In DNA, the linkages between different nitrogenous bases are
H-bonding correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Biomolecules and Polymers
#hydrogen bonds
21 public questions tagged with this topic.
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Which nucleic acid base pairs with two hydrogen bonds in DNA?
Adenine pairs with thymine in DNA via two hydrogen bonds, contributing to the double helix stability.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
How many hydrogen bonds are formed between adenine and thymine in DNA?
Adenine and thymine form two hydrogen bonds in DNA, contributing to base pairing stability.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
How many hydrogen bonds are formed between guanine and cytosine in DNA?
Guanine and cytosine form three hydrogen bonds in DNA, contributing to the stability of the double helix.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Nucleic Acids - Structure - Nucleotides, Sugars and Base Pairing
Which bond stabilizes the alpha-helix in proteins?
Hydrogen bonds between the -NH and -C=O groups of the peptide backbone stabilize the alpha-helix structure.
Ref: NCERT Class 12 Chemistry > Chapter 14: Biomolecules > Topic: Proteins - Structure, Classification and Denaturation
Which type of bonds are broken when DNA is denatured at high temperatures?
Hydrogen bonds between complementary base pairs are broken during DNA denaturation, allowing strand separation in processes like PCR.
Ref: NCERT Class 12 Biology Chapter 9: Biotechnology: Principles and Processes Polymerase Chain Reaction - PCR and Applications
Which type of bond stabilizes the two strands of the DNA double helix?
Hydrogen bonds between complementary base pairs stabilize the DNA double helix.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Structure Double Helix and Packaging - Nucleosome
Which of the following bonds stabilizes the tertiary structure of proteins?
Disulfide bonds between cysteine residues help stabilize the tertiary structure of proteins.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
Which type of bond stabilizes the secondary structure of proteins?
Hydrogen bonds stabilize the alpha-helix and beta-sheet structures in the secondary structure of proteins.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzyme Action and Factors Affecting Enzyme Activity
The maximum number of hydrogen bonds that can form between NHâ‚‚-NHâ‚‚ (hydrazine) and water is:
4 is obtained by applying the relevant formula or quantitative relationship to the given parameters. In Chemical Bonding, numerical problem-solving requires understanding the mathematical relationships between biological variables. The calculation involves substituting the provided values into the appropriate equation and solving systematically. The other options (1, 2, and 3) result from common calculation errors such as using incorrect formulas, misidentifying variables, inverting ratios, or making arithmetic mistakes.
Ref: Campbell Biology, Urry et al., 12th Ed.
Which of the following hydrogen bonds is the strongest?
O-H---O is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of O-H---O directly address what is being asked. Among the other options, O-H---N, N-H---O, and N-H---N do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.
Which of the following molecules can form the weakest hydrogen bond?
N-H---F is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of N-H---F directly address what is being asked. Among the other options, O-H---O, O-H---N, and N-H---N do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.
