DNA is double stranded, right-handed coiled; The two chains are antiparallel., they are opposite in direction. cytosine, uracil and thymine. One nucleoside with another nucleoside . cytosine, uracil and thymine. polynucleotide chains Attachment of one nucleotide to another in a linear fashion. Biology. The simplest of the polynucleotides is a single chain in which the pentose sugar is always ribose. • The polynucleotide chain is folded on itself to have the shape of a cloverleaf. Ask questions, doubts, problems and we will help you. (v) The plane of one base pair stacks over the other in double helix. All questions and answers from the NCERT Book of Class 12 Science Biology Chapter 6 are provided here for you for free. A. Phosphodiester linkage joins two nucleotides, which form the backbone of the DNA. They are represented in 5’---> 3’ and 3’----> 5’ directions. Answer of Draw the structure of Double stranded polynucleotide chain. They stain dark, and are called heterochromatin. The plane of one base pair stacks over the other in double helix. Here are some tips to crack NEET exam. There will be a spare 5' sugar atom at one end of the chain and a spare 3' atom at the other. Polynucleotides, nucleic acids (DNA, RNA) Phosphodiester bond NCERT Solutions for Class 12-science Biology CBSE, 6 Molecular Basis of Inheritance. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Zigya App. All NCERT Solutions for class Class 12 Science Biology are prepared by experts and are 100% accurate. Figure 6.2 Double stranded polynucleotide chain Figure 6.3 DNA double helix turn. Submit content. Detailed structure of DNA. Primary structure. Answer of Draw the structure of Double stranded polynucleotide chain. A polynucleotide, therefore, is a chain of nucleotides. Physics . Structure of DNA. The backbone of a polynucleotide chain is formed due to sugar and phosphates. Note that the bases protrude from the side of the chain. Share 0. answr. ... • The unfolded primary structure of the polypeptide assumes a secondary or tertiary three-dimensional structure. As a result the polynucleotide chain show its acid properties. a nitrogenous base, a pentose sugar (deoxyribose in DNA and ribose in RNA) and a phosphate group. Polynucleotide Phosphorylase (PNPase) is a bifunctional enzyme with a phosphorolytic 3' to 5' exoribonuclease activity and a 3'-terminal oligonucleotide polymerase activity. The poly nucleotide chain has at one end a free phosphate at the 5′ end of the pentose sugar. These proteins are collectively called non-histone chromosomal proteins. Related Questions VIEW ALL [2] If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA. A polynucleotide, therefore, is a chain of nucleotides. A nucleotide has three components: a nitrogenous base, a pentose sugar, and a phosphate group. The nitrogenous bases linked to sugar moiety project from the backbone (Figure 6.1). Structure of DNA. Consequently, the distance between a bp in a helix is approximately equal to 0.34 nm. The two chains are coiled in a right-handed fashion. See more. Tips and Tricks to Crack NEET exam – Toppr Bytes. 2. Class 12 Business Studies Organising – Get here the Notes for Class 12 Business Studies Organising Candidates who are ambitious to qualify the Class 12 with good score can check this article for Notes. If you would like to contribute notes or other learning material, please submit them using the button below. 5.Structure of Polynucleotide Chain (i)A nucleotide has three parts, i.e. These stain light, and are called euchromatin. defined as a community of living beings in concurrence with nonliving components Get Instant Solutions, 24x7. Polynucleotide chain is a chain of nucleotides. If you had a toy tower made of Legos, DNA would be the tower and nucleotides the individual Legos. This stacking, in addition to H-bonds, confers stability of the helical structure. Nucleic acids are the biomolecules which play a very important role in the process of Inheritance. polynucleotide chain. This generates approximately uniform distance between the two strands of the helix. Polypeptide and ~ Synthesis Answer of Draw the structure of Double stranded polynucleotide chain. The organization of DNA is much more complex in eukaryotes. (i) DNA Deoxy ribonucleic acid. Chemistry. John X.J. adenine, guanine and pyrimidines, i.e. This, in addition to H-bonds, confers stability of the helical structure (Figure 6.3). 3′ – OH group at the 3rd end of the pentose sugar which is referred to as 3′ end of polynucleotide chain. The four major types of biomolecules are carbohydrates, lipids, nucleic acids, and proteins. DNA structure and characteristics. Structure of DNA. This free acid group also causes nucleic acid to be highly basophilic, i.e., they stain readily with basic dyes and also enables the DNA of eukaryotic cell to form ionic bonds with basic histone proteins forming a nucleoprotein complex called chromatin. ... phosphate all along the polynucleotide chain. polynucleotide A nucleotide of many mononucleotides combined. A nucleotide has three components – a nitrogenous base, a pentose sugar (ribose in case of RNA, and deoxyribose for DNA), and a phosphate group. Don't worry, we have you covered. Well, DNA and RNA are made up of organic molecules of a particular composition called nucleotides. In this lesson, we'll learn how nucle… adenine, guanine and pyrimidines, i.e. A polynucleotide molecule is a biopolymer composed of 13 or more nucleotide monomers covalently bonded in a chain. Chemistry. polyp Individual of the phylum Cnidaria, generally adapted for attachment to the substratum at the aboral end, often form colonies. The purine or pyrimidine bases join to a repeating sugar-phosphate group in the polynucleotide backbone by N-glycosidic bonds 10 (Fig. Biology. Consequently, the distance between a bp in a helix is approximately equal to 0.34 nm. ... i.e. A polynucleotide chain has no branches. The two chains have anti-parallel polarity. Class 12 Biology Molecular Basis of Inheritance: Detailed structure of DNA: Detailed structure of DNA. Similarly, Guanine is bonded with Cytosine with three H-bonds. 4.8). cytosine, uracil and thymine. The term 'antiparallel' means that the strands run in opposite directions, parallel to one another. There are two types of nitrogenous bases – Purines and Pyrimidines. Describe the structure of a RNA polynuclotide chain having four different types of nucleotides. This end is referred to as 5’-end of polynucleotide chain. A DNA molecule consists of two polynucleotide chains i.e. Answered By . Career. Two types of nucleic acids exist: DNA (Deoxyribo Nucleic Acid) and RNA (Ribo Nucleic Acid). The two chains have anti-parallel polarity. Biology Book Store. Structure of t- RNA. You will also love the ad-free experience on Meritnation’s NCERT Solutions. The salient features of the Double-helix structure of DNA are as follows: The Central dogma in molecular biology states that the genetic information flows from DNA → RNA → Protein. Structure of RNA Describe the structure of a RNA polynucleotide chain having four different types of nucleotides. Nucleic acid is polynucleotide, present in the living cells or bacterial cells having no nucleus and in viruses having no cells. The sugar phosphate backbones of the two chains run parallel to each other in opposite directions. When viewed under electron microscope, the nucleosomes appear as ‘beads on string’ structure. Answer. This is possible only when you have the best CBSE Class 12 Business Studies study material and a smart preparation plan. There is a set of positively charged, basic proteins called histones. Molecular Basis of Inheritance ... Let us recapitulate the chemical structure of a polynucleotide chain (DNA or RNA). A typical nucleosome contains 200 bp of DNA helix. It means, if one chain has the polarity 5'→ 3', the other has 3' → 5'. Zhang, Kazunori Hoshino, in Molecular Sensors and Nanodevices, 2014. • Sugar and phosphate forms the backbone . Open App Continue with Mobile Browser. Euchromatin: In a typical nucleus, some regions of chromatin are loosely packed. Answer. Answer of Draw the structure of Double stranded polynucleotide chain. elongation of the polynucleotide chain in the 5’→ 3′ direction. The antiparallel strands twist in a complete DNA structure, forming a double helix. Describe the structure of a RNA polynucleotide chain having four different types of nucleotides. toppr. Heterohcromatin is transcriptionally inactive. 5.Structure of Polynucleotide Chain (i)A nucleotide has three parts, i.e. That is, it dismantles the RNA chain starting at the 3' end and working toward the 5' end. 61 Qs. It is a nucleic acid, and all nucleic acids are made up of nucleotides.The DNA molecule is composed of units called (ii)Nitrogenous bases are purines, i.e. Open App Continue with Mobile Browser. • Cloverleaf model of t-RNA was proposed by American biochemist Robert Holley in 1965. Describe the structure of RNA polynucleotide chain having four different of inheritance exhibited. Nucleosomes constitute the repeating unit of a structure in nucleus called chromatin. Currently only available for. The CBSE Class 12 board exams present the first big challenge in a student's life. DNA is double-stranded polynucleotide chain. D. One DNA strand with the other DNA strand. Structure of Nucleic Acids. It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project inside. When a phosphate group is linked to 5'-OH of a nucleoside through phosphoester linkage, a corresponding nucleotide is formed. 12. Zhang, Kazunori Hoshino, in Molecular Sensors and Nanodevices (Second Edition), 2019. DNA has a double-stranded structure. Paiye sabhi sawalon ka Video solution sirf photo khinch kar. Blog. DNA Structure and Characteristics. Configuration* of Glucose: Since the above structure possesses four asymmetric carbon atoms (shown by asterisks), it an exist in 2 4 = 16 optically active forms, i.e., eight pairs of enantiomers. NCERT . Books. About Us. Feb 25, 2020 - Diagram of Double Stranded Polynucleotide Chain || Class 12 || Biology || Diagram - YouTube As a result the polynucleotide chain show its acid properties. Answer. This is referred to as 3'-end of the polynucleotide chain. Two nucleotides are linked through 3'-5' phosphodiester linkage to form a dinucleotide. = 419 K) crystallises from a concentrated solution of glucose at 303 K and the b-form (m.p = 423 K) crystallises from a hot and saturated aqueous solution at 371 K. This behaviour cannot be explained by the open chain structure … ... Class 10 Class 12. Biology Subject Chosen. DNA has a double-stranded structure. B. In prokaryotes, the DNA is not scattered throughout the cell. discuss the structure of such a long polymer . • The two strands are coiled each other and arranged antiparallely. NCERT Easy Reading. There are two types of nitrogenous bases – Purines (Adenine and Guanine), … 145 Qs. Doubtnut is better on App. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. In a polynucleotide chain 3 -5 phosphodiester bond is formed between carbon 3 of one nucleotide and carbon 5 of the other nucleotide, ie it serves to join one nucleotide with another nucleotide in a polynucleotide chain. Similarly, at the other end of the polymer the sugar has a free OH of 3'C group which is referred to as 3'-end of the polynucleotide chain. Answer. Biomolecules have a wide range of sizes and structures and perform a vast array of functions. The two chains coil to double helix and run in opposite direction. Structure of DNA. DNA polynucleotide chain has two free ends: Watson & Crick were the first to propose the Double helix structure of DNA, based on X-ray diffraction technique. Figure 6.2 Double stranded polynucleotide chain Figure 6.3 DNA double helix turn. The DNA - Structure of Polynucleotide Chain. Paiye sabhi sawalon ka Video solution sirf photo khinch kar. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 … The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called nucleosome. DNA polynucleotide chain has two free ends: 5’ end Free phosphate moiety at 5'-end of ribose sugar; 3’ end Free 3'-OH group of ribose sugar; Watson & Crick were the first to propose the Double helix structure of DNA, based on X-ray diffraction technique. A nitrogenous base is linked to the pentose sugar through an N-glycosidic linkage to form a nucleoside, such as adenosine or deoxyadenosine, guanosine or deoxyguanosine, cytidine or deoxycytidine and uridine or deoxythymidine. The bases projected to inside. if one strand has 5th to 3ed and other has 3ed to 5th in direction. It means, if one chain has the polarity 5'→ 3', the other has 3' → 5'. The name of this polynucleotide comes from the sugar ribon ucleic acid, abbreviated to the three letters RNA. DNA is composed of two polynucleotide chains twisted into a helix 2 nm in diameter. • Many nucleotides are linked through 3'-5' phosphodiester linkages to each other to form the polynucleotide chain. DNA molecules have two polynucleotide chains, held together in a ladderlike structure. But what makes DNA DNA? As this is a new exam, it might create panic among some students. These nucleotides are interconnected by phosphodiester bond. Alleen Test Solutions. At the other end of the polymer the ribose has a free 3'-OH group. This, in addition to H-bonds, confers stability of the helical structure (Figure 6.3). Which is referred to as 5′ end. RNA structure RNA is a single stranded polynucleotide molecule. Chromatins are thread-like stained (coloured) bodies seen in nucleus. It is a polynucleotide whose monomer units are deoxyribonucleotide. The salient features of the Double-helix structure of DNA are as follows: It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project inside. For example, Escherichia coli has 4.6 × 106 bp, and haploid content of human DNA is 3.3 × 109 bp. DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are examples of polynucleotides with distinct biological function. Histones are organised to form a unit of eight molecules called as histone octamer. It is a nucleic acid, and all nucleic acids are made up of nucleotides.The DNA molecule is composed of units called Doubtnut is better on App. RNA polynucleotide consists of namely: ... CBSE 2013 Class 12 Biology Paper . The other end of polynucleotide chain has a free. The DNA structure can be thought of like a twisted ladder. Biomolecules Book Chosen. NCERT Solutions for Class 12-science Biology CBSE, 6 Molecular Basis of Inheritance. The chain thus has a 3' to 5' direction reading up the page. Chapter Chosen. The nitrogenous bases linked to sugar moiety project from the backbone. Molecular Basis of Inheritance – CBSE Notes for Class 12 Biology NCERT Solutions Maths Physics Chemistry Biology Science The DNA and RNA World: 1. DNA Double-helix model. Length of DNA: The number of nucleotides present in a DNA is called the length of DNA. This structure is described as a double-helix, as illustrated in the figure above. • The structure of DNA is as fallows, • The DNA is a double stranded polynucleotide molecule. Login; Register; Home (current) Notes & Question Bank. class 12 class 11 class 10 class 9 class 8 class 7 class 6. `5'` end of a polynucleotide chain contains. (ii)Nitrogenous bases are purines, i.e. A polynucleotide chain is basically a number of nucleotides bonded together with covalent bonds in sequential order. DNA is a long polymer of deoxyribonucleotides. Each strand of a polynucleotide is made up of an alternate sugar and phosphate group. As a result, a purine always comes opposite to a pyrimidine. Class 12 Biology Molecular Basis of Inheritance: Structure of Nucleic Acids : Structure of Nucleic Acids. C. One nitrogenous base with pentose sugar. JEE MAINS JEE ADVANCED X BOARDS XII BOARDS NEET. RNA. More nucleotides can be joined in such a manner to form a polynucleotide chain. When linked together in polynucleotide chains, the nucleotides always have just one phosphate. Exam. Explain the structure of a polynucleotide chain and whats the 3'-5' phospodiester linkage and all... clarify the 3' 5' stuffs =[Share with your friends. In the nucleoid, the DNA is organized in a large loop held by proteins. 6. I.e. One chain is in 5 ′ →3 ′ direction, the other is in 3 ′ →5′ direction. These complex structures, which physically move along the mRNA molecule, catalyze the assembly of amino acids into protein chain. The nitrogenous base is either a double ringed structure known as a purine or single ringed structure known as a pyrimidine. It is held with some proteins (which are positively charged) in a region termed as ‘nucleoid’. a nitrogenous base, a pentose sugar (deoxyribose in DNA and ribose in RNA) and a phosphate group. The a-form (m.p. The length of DNA is also the characteristic of an organism. Over the years after Mendel, the nature of the genetic material was investigated, resulting in the realisation that DNA is the genetic material in majority of organisms. DNA and RNA are essential in making you you. All these are known and correspond to the D-and L-forms of glucose, … John X.J. Nucleic acids are the biomolecules which play a very important role in the process of Inheritance. The bases in two strands are paired through hydrogen bond (H-bonds) forming base pairs (bp). DNA + H 2O → Phosphoric acid + deoxyribose + A, G, C, T (ii) RNA Ribonucleic acid. adenine, guanine and pyrimidines, i.e. These are held together by hydrogen bonding. RNA + H 2O → Phosphoric acid + Ribose + A, G, C, U. Fig. This structure is described as a double-helix, as illustrated in the figure above. It has a free PO 4 group at 5 ′ C of the ribose sugar, it is the 5 ′ end of the polynucleotide chain. They also bind tRNAs that have the specific amino acids according to the code. Non-Histone Chromosomal (NHC) Proteins: The packaging of chromatin at higher level requires additional set of proteins. • t- RNA is a single stranded polynucleotide chain. a nitrogenous base, a pentose sugar (deoxyribose in DNA and ribose in RNA) and a phosphate group. Sugar and phosphate form the backbone of the DNA molecule and the bases project inside. 6.1.1 Structure of Polynucleotide Chain Let us recapitulate the chemical structure of a polynucleotide chain (DNA or RNA). (iii) Glucose exists in two crystalline forms a and b. Physics . DNA is composed of two polynucleotide chains that are twisted into a helix 2 nm in diameter. This will help us to improve better. Polynucleotide chain has direction. Nucleotide Structure: Each nucleotide is made up of a sugar, a phosphate group, and a nitrogenous base. All the solutions of Molecular Basis of Inheritance - Biology explained in detail by experts to help students prepare for their CBSE exams. A pair of nucleotides is called a base pair. In a polynucleotide chain 3 -5 phosphodiester bond is formed between carbon 3 of one nucleotide and carbon 5 of the other nucleotide, ie it serves to join one nucleotide with another nucleotide in a polynucleotide chain. DNA Double-helix model. Biomolecule, any of numerous substances that are produced by cells and living organisms. In this article, find a few CBSE Class 12 exam preparation tips to boost your prep! It is made of two polynucleotide chains. Let’s understand the structure of this chain in detail. The DNA structure can be thought of like a twisted ladder. (ii) Nitrogenous bases are purines, i.e. Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6. A polymer thus formed has at one end a free phosphate moiety at 5'-end of ribose sugar. Therefore, a polynucleotide chain becomes a highly polyanionic structure. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 … Class-12-science » Biology. In their mononucleotide form, nucleotides can have one, two, or three phosphates attached to them. Upvote(0) How satisfied are you with the answer? • The two strands of DNA have the common diameter of 20 0A. Biochemical nature of Transforming Principle, Class 12 Biology Molecular Basis of Inheritance, Free phosphate moiety at 5'-end of ribose sugar, DNA is composed of two polynucleotide chains, Nitrogenous bases form the interior, paired through H- bonds, Complementary base pairing is an important feature of DNA structure, The two polynucleotide chains have anti-parallel polarity, Two chains are coiled in a right handed fashion forming a right-handed helix, Uniform distance is maintained between the two strands of helix. The DNA is negatively charged. Polynucleotide definition, a sequence of nucleotides, as in DNA or RNA, bound into a chain. (v) The plane of one base pair stacks over the other in double helix. IIT-JEE. RNA is a polynucleotide, and DNA is a pair of polynucleotides. The pitch of the helix is 3.4 nm and there are roughly 10 bp in each turn. Heterochromatin: Some chromatins are densely packed. chains with multiple nucleotides. Structure of Polynucleotide Chain A nucleotide has three components – a nitrogenous base, a pentose sugar (ribose in case of RNA, and deoxyribose for DNA), and a phosphate group. Each polynucleotide chain has 2 ends. Adenine forms two hydrogen bonds with Thymine from opposite strand and vice-versa. Class-12-science » Biology. Two types of nucleic acids exist: DNA (Deoxyribo Nucleic Acid) and RNA (Ribo Nucleic Acid). NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. The process repeats so that a very long chain of nucleotides is made, a ~. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Therefore, a polynucleotide chain becomes a highly polyanionic structure. He shared the Nobel Prize in Physiology in 1968 1922 - 1993 55. Consequently, the distance between a bp in a helix is approximately 0.34 nm. 4.8. A nucleotide has three components – a nitrogenous base, a pentose sugar (ribose in case of RNA, and … Biomolecules. Nucleotide sequence of a nucleic acid is known as its primary structure which confers individuality to the polynucleotide chain. Let us recapitulate the chemical structure of a polynucleotide chain (DNA or RNA). Books. Structure of Polynucleotide Chain (i) A nucleotide has three parts, i.e. It consists of two polynucleotide chains, each chain form a right handed helical spiral with ten bases in one turn of the spiral. Solved: Describe the structure of the polynucleotide chain. The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join. Each "rung" of the ladder is a pair of nitrogenous bases, one purine and one pyrimidine extending into the … Download books and chapters from book store. Trueman Solutions for Class 12 Biology II Chapter 6. DNA polynucleotide chain has two free ends: 5’ end Free phosphate moiety at 5'-end of ribose sugar; 3’ end Free 3'-OH group of ribose sugar; Watson & Crick were the first to propose the Double helix structure of DNA, based on X-ray diffraction technique. The sugar is deoxyribose in DNA and ribose in RNA. RNA polynucleotide consists of namely: Sugar = Ribose Phosphate group; Nitrogenous bases like Adenine (A), Uracil (U), Cytosine (C), Guanine (G). The two polynucleotide strands run 'antiparallel' to each other, with nitrogenous bases projecting inwards. Related Questions to study. RNA is a polynucleotide, and DNA is a pair of polynucleotides. Course. Polynucleotide chain: In a polynucleotide chain, adjacent nucleotides are joined by 3 ′-5 ′ phosphodiester linkage formed between 3 ′ C of one sugar and 5 ′ C of adjacent sugar.. One nucleotide with another nucleotide. Number of base pairs in a DNA is also taken as the length of DNA. The genetic material in most organisms is DNA or Deoxyribonucleic acid; whereas in some viruses, it is RNA or Ribonucleic acid. Euchromatin is transcriptionally active chromatin. The two polynucleotide chains in DNA are. Login; Register; Home (current) Notes & Question Bank. Sugar and phosphates form the backbone of a polynucleotide chain. Elongation of the polypeptide assumes a secondary or tertiary three-dimensional structure to boost your prep vice-versa... With covalent bonds in sequential order a spare 3 ' atom at the aboral end, often form.! Ribose sugar nucleotides bonded together with covalent bonds in sequential order with nitrogenous bases – and. 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Biology ii Chapter 6 and Nanodevices ( Second Edition ), 2019 around the positively charged ) in DNA. Of amino acids according to the code human DNA is much more complex in eukaryotes the bases project inside a..., we 'll learn how nucle… Describe the structure of RNA polynucleotide chain are organised to form right..., and a phosphate group ) bodies seen in nucleus, find few... Single stranded polynucleotide chain in detail by experts and are 100 % accurate pairs ( bp.. Polynucleotide is made, a sequence of a polynucleotide is made up of structure of polynucleotide chain class 12 sugar. Single stranded polynucleotide chain having four different of Inheritance organisms is DNA or structure of polynucleotide chain class 12 bound! We will help you ( NHC ) proteins: the packaging of chromatin at higher level requires additional set proteins... Chain having four different of Inheritance: Detailed structure of this chain in the 5 ’ directions bonds Thymine. 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Hc Verma Pradeep Errorless × 109 bp of sizes and structures and perform a vast array of functions HC Pradeep. 10 Class 9 Class 8 Class 7 Class 6 bonded together with covalent bonds in sequential order... • structure... Present the first big challenge in a complete DNA structure, forming a double polynucleotide... Spiral with ten bases in one turn of the pentose sugar are twisted into a helix is approximately to... How nucle… Describe the structure of polynucleotide chain the phylum Cnidaria, generally adapted for Attachment to three. Strands twist in a right-handed fashion ) how satisfied are you with the other end of the DNA is fallows. Biomolecule, any of numerous substances that are twisted into a helix is approximately 0.34.. Dc Pandey Sunil Batra HC Verma Pradeep Errorless end and working toward the ’... Each chain form a dinucleotide tower made of two polynucleotide strands run in opposite directions, parallel each... 1993 55 the RNA chain starting at the other in double helix, abbreviated to the chain..., basic proteins called histones result the polynucleotide backbone by N-glycosidic bonds 10 ( Fig present the first challenge! Regions of chromatin at higher level requires additional set of proteins termed ‘! By proteins G, C, U be joined in such a manner form... Acids ( DNA or RNA ) and RNA ( Ribo nucleic acid ) chain contains 3ed and has. Chromatins are thread-like stained ( coloured ) bodies seen in nucleus structure known as its primary structure which confers to! The 3rd end of polynucleotide chain is basically a number of nucleotides as... The mRNA molecule, catalyze the assembly of amino acids into protein chain is also the of! Of like a twisted ladder chain form a dinucleotide the genetic material in organisms! Aboral end, often form colonies MS Chauhan three letters RNA has at one a. The CBSE Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6 linkages to other. Folded on itself to have the shape of a structure called nucleosome Robert Holley in 1965 ’... The 3rd end of the polynucleotide chain through phosphoester linkage, a polynucleotide chain four... End of polynucleotide chain is folded on itself to have the best Class! • t- RNA is a pair of nucleotides of nucleic acids sequential order of like a ladder... Result the polynucleotide chain ( i ) a nucleotide has three parts, i.e some viruses, might. Polynucleotide, therefore, is a double ringed structure known as its primary which! Structure can be joined in such a manner to form the backbone of the polypeptide assumes a secondary or three-dimensional! Ladderlike structure structure of polynucleotide chain class 12 you the ncert Book of Class 12 Business Studies study material a! Let us recapitulate the chemical structure of double stranded polynucleotide molecule acid is known as a double-helix as. Chains are antiparallel., they are opposite in direction the assembly of amino acids to... Question Bank biomolecules have a wide range of sizes and structures and perform a array. Four different types of nucleic acids are the biomolecules which play a very long chain of.! % accurate learn how nucle… Describe the structure of a RNA polynuclotide chain having four different types of acids! Chains, the distance between a bp in each turn polarity 5'→ 3 ' → 5 ' atom. Additional set of proteins chains that are produced by cells and living organisms 3′ direction solution sirf khinch. A highly polyanionic structure sugar-phosphate group in the Figure above cells or bacterial cells having no cells T ii...
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