Regular coiling & twisting of polypeptide chain caused by H-bonding in between NH & CO occurs in _.
Correct answer: B. Secondary structure
- A. Primary structure
- B. Secondary structure
- C. Tertiary structure
- D. Quaternary structure
Explanation
The secondary structure of proteins includes α-helices and β-sheets. These structures form due to hydrogen bonding between NH and CO groups of the polypeptide backbone. This bonding stabilizes the regular coiling and folding patterns.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Macromolecules
Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
Practise Macromolecules
299 free Macromolecules MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Macromolecules questions
The structure shown below represents:
_ is/are a non-reducing sugar.
Monosaccharides contain _ carbon atoms.
Alanine, lysine and tryptophan are:
Amino acids react with each other such that -COOH group of one amino acid reacts with the -NH2 group of another amino acid to give a condensed structure as shown below. What is the name of the circled part of this structure?
In an aqueous solution, amino acids exist in an ionic form as shown below. This ionic form of amino acid is known as: