Nitrogen is present in___________?
Correct answer: B. proteins
- A. carbohydrates
- B. proteins
- C. lipids
- D. carbonates
Explanation
Proteins contain nitrogen because their amino acids have amino groups, written as -NH2, in addition to carbon, hydrogen, and oxygen. Most carbohydrates and lipids do not contain nitrogen in their basic structures, so students may choose lipids if they incorrectly generalize that all major organic molecules have the same elements.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Proteins
Proteins are polymers of amino acids joined by peptide bonds, and their function depends on primary, secondary, tertiary and quaternary structure. The topic covers fibrous and globular proteins, enzymes, antibodies, hormones and transport proteins, as well as denaturation by heat or extreme pH.
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 Proteins questions
Peptide bonds are important in protein because they:
The following is an example of a globular protein:
The secondary structure of proteins is stabilized by:
Proteins are made from amino acids by the process of ______________?
enzymes are actually composed of ___________?
Which of the following is a disease caused by deficiency of protein in children?