Biology · Chemistry

Biomolecules and Enzymes

1,432 Questions

This topic focuses on biomolecules, specifically proteins, enzymes, and amino acids. It includes questions on enzyme structures, protein folding, and catalysis. These concepts are crucial for medical and biology competitive exams.

Enzyme catalysisProtein structuresAmino acid synthesisPolypeptide chainsBiomolecule properties

Biomolecules and Enzymes Questions

Multiple choice

Why are animal proteins called first class proteins?

  1. They release energy in absence of energy in the body.

  2. They repair the damaged tissues in the body.

  3. They contain all the amino acids.

  4. They protect the body from diseases.

  5. They cushion the internal organs.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Animal proteins are called first class proteins because they contain all the amino acids.

Multiple choice

Which of the following is not correct about proteins?

  1. It is known to form tissues in the body.

  2. Nitrogen is its main constituent.

  3. It can be directly stored in the body.

  4. It can release energy when the body is in its need.

  5. It gets converted into urea and excretes out of the body with urine.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The protein is not stored in the body. Hence, this statement is incorrect.

Multiple choice

Which of the following sets represents essential amino acids?

  1. Tryptophan, Histidine, Aspartic acid, Proline, Leucine

  2. Valine, Leucine, Tryptophan, Lysine, Histidine

  3. Alanine, Proline, Aspartic acid, Glycine, Cysteine

  4. Valine, Leucine, Aspartic acid, Glycine, Cysteine

  5. Alanine, Valine, Lysine, Glycine, Tryptophan
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Correct answer 

Multiple choice

Which of the following statements is/are not correct?

P. Coordination number of iron in rubredoxin is 6. Q. Oxidation state of iron in transferrin is 2. R. Haemosiderin is a cell Fe storage protein. S. The protein coat of ferritin is a hollow sphere of 24 polypeptide chains.

  1. P and Q

  2. P and R

  3. P and S

  4. Q and R

  5. R and S
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct. This option is wrong because haemosiderin is a cell Fe storage protein and protein coat of ferritin is a hollow sphere of 24 polypeptide chains.