CBSE Class 11 Biology HOTs Biomolecule

MULTIPLE CHOICE QUESTIONS

Question. Who coined the term zymase? 
(a) Pasteur
(b) Buchner
(c) Kuhne
(d) Sumner
Answer. B

Question. Which is the derivative of amino acid ?
(a) Epinephrine
(b) Estrogen
(c) Progesterone
(d) All of these
Answer. A

Question. Apoenzyme is 
(a) protein
(b) lipid
(c) sugar
(d) vitamin
Answer. A

Question. Which one of the following statements regarding starch and cellulose is not correct?
(a) Both of them are of plant origin.
(b) Both of them are polymers.
(c) Both of them give colour with iodine.
(d) Both of them are made up of glucose molecules.
Answer. C

Question. Which of the following type of enzyme is not matched correctly with the molecule that it breaks down? 
(a) Amylase–starch
(b) Lipase–starch
(c) Protease–proteins
(d) Disaccharidase–sugars
Answer. B

Question. Gamma globulins are synthesized inside
(a) liver
(b) kidney
(c) bone marrow
(d) lymph and lymphoid tissues
Answer. A

Question. Refer the given structure of adenylic acid. In this identify A.

(a) Glycosidic bond
(b) Phosphate bond
(c) Ester bond
(d) Ionic bond
Answer. C

Question. The figure given below show three velocitysubstrate concentration curves for an enzyme reaction. What do the curves a, b and c depict respectively?

(a) a - normal enzyme reaction,b - competitive inhibition,c - non-competitive inhibition.
(b) a - enzyme with an allosteric modulator added, b - normal enzyme activity,c - competitive inhibition.
(c) a - enyzme with an allosteric stimulator,b - competitive inhibitor added,c - normal enzyme reaction.
(d) a - normal enzyme reaction,b - non-competitive inhibitor added,c - allosteric inhibitor added.
Answer. A

ASSERTION REASON QUESTIONS

Directions : These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following five responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.

Question. Assertion : Enzymes have active sites and substrates have reactive sites on their surface respectively.
Reason : Active and reactive sites push the enzyme and substrate molecules away from each other.
Answer. D

Question. Assertion : Vegetable oils are fats which are present in plant cells in soluble form.
Reason : Vegetable oils occur only in cells of embryo. 
Answer. D

Biomolecule

Question. What do you mean by PUFA?
Answer. Poly Unsaturated Fatty Acid

Question. Identify the secondary protein and quaternary proteins in following examples. Trypsin, Haemoglobin protein, Myosin protein, Actin protein, Albumin, globulin.
Answer. Secondary Protein: Myosin protein, Actin protein, Albumin, globulin, Trypsin Tertiary Protein: ( Hemoglobin protein )

Question. What is histone protein. Where it is found in cell. Mention the function of it in eukaryotic cell.
Answer. Basic proteins rich in lysine , found in nucleoplasm. Binds with negatively charged DNA forming Octamers called nucleosome.