Biology Biomolecules - Online Test

Q1. Enzymes catalysing in the link together of two compounds are
Answer : Option B
Explaination / Solution:

Ligases catalyses the linking together of 2 compounds, e.g.,enzymes which catalyse joining of C-O, C-S, C-N, P-O etc. bonds.

Q2. The protein portion of an enzyme is called as
Answer : Option B
Explaination / Solution:

Apoenzyme: The polypeptide or protein part of the enzyme is called the apoenzyme and may be inactive in its original synthesized structure. The inactive form of the apoenzyme is known as a proenzyme or zymogen.

Q3. Nicotinamide can be synthesised in human body from
Answer : Option A
Explaination / Solution:

Tryptophan is an amino acid needed for normal growth in infants and for nitrogen balance in adults. Nicotinamidecan be synthesized in human body from tryptophan.

Q4. Important site for formation of glycoproteins and glycolipids is
Answer : Option B
Explaination / Solution:

Synthesis of glycoproteins and glycolipids take place in Golgi apparatus inside the cell. Golgi apparatus is located near nucleus of the cell.

Q5. Most abundant mineral in body fluids are
Answer : Option C
Explaination / Solution:

Most abundant mineral in body fluids are and ions. These ions are responsible for generation of impulses and its transfer through neuron cells.

Q6. The oils have
Answer : Option C
Explaination / Solution:

Oils have lower melting point (e.g., gingely oil) and hence remain as oil in winters.

Q7. The diagram represent

Answer : Option B
Explaination / Solution:

The diagram shown is a uracil which is a pyramidine belonging to nitrogen bases.

Q8. Arachidonic acid has
Answer : Option A
Explaination / Solution:

Arachidonic acid has 20 carbon atoms including the carboxyl carbon. Molecular formula- C20H32O2.

Q9. Which of the following are aromatic amino acids?
Answer : Option D
Explaination / Solution:

Based on number of amino and carboxyl groups, there are acidic (e.g., glutamic acid), basic (lysine) and neutral (valine) amino acids. Similarly, there are aromatic amino acids (tyrosine, phenylalanine, tryptophan).

Q10. Which is the neutral amino acid?
Answer : Option C
Explaination / Solution:

Side chains which have pure hydrocarbon alkyl groups (alkane branches) or aromatic (benzene rings) are non-polar. Examples include valine, alanine, leucine, isoleucine, phenylalanine.