Glycylalanine has how many peptide linkages:
Correct answer: A. One
- A. One
- B. Two
- C. Three
- D. None
Explanation
The term 'dipeptide' indicates that the molecule is composed of two amino acids linked by a single peptide bond. In glycylalanine, glycine and alanine are joined through the formation of a peptide linkage, which involves the removal of a water molecule (a process called condensation). This results in only one peptide linkage. Options suggesting more than one peptide linkage are incorrect because they imply additional amino acids or bonds that do not exist in a simple dipeptide. Option D is incorrect because a dipeptide must have at least one peptide bond.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Biological Molecules
The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, 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 Biology questions like this
Biology is on 8 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 Biological Molecules questions
A glucopyranose having hydroxyl group -OH, on carbon atom 1, below the ring is called:
Select the one which show characteristics like polymer of beta glucose, 1,4 glycosidic linkage?
Cotton is the pure form of:
It is not fibrous:
Most abundant protein:
Enzymes, antibodies. hormones and hemoglobin are examples of: