The following dipeptide is called:
Correct answer: B. Glycyl alanine
- A. Glycyl glycine
- B. Glycyl alanine
- C. Alaninyl alanine
- D. Alaninyl glycine
Explanation
Left residue is glycine (-CH2-NH2), right residue is alanine (α- C bears a CH3). They are joined by a peptide bond from glycine's carbonyl to alanine's NH → glycyl-alanine. Left residue is glycine (-CH2-NH2), right residue is alanine (α-C bears a CH3). They are joined by a peptide bond from glycine's carbonyl to alanine's NH → glycyl-alanine.
Last updated
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.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 calorie = _ Joules.
A carbohydrate that cannot be acid hydrolyzed is called a:
A chemist isolated a protein from a crab and wanted to determine its molecular weight. Which of the following method would have given the best result for him?
A dipolar charged but overall electrically neutral ion is called:
A disease caused by Plasmodium parasite is: