Biology

1. Michaelis constant K_m is equal to

K₁ x K₂/ K₃

K₁/K₂ – K₃

K₂ – K₃/K₁

K₂ + K₃/K₁

Question 1 of 15

2. Apoenzyme is

Lipid

Sugar

Vitamin

Protein

Question 2 of 15

3. Which one of the following statements regarding starch and cellulose is not correct?

Both of them are of plant origin.

Both of them are polymers

Both of them are made up of glucose molecules

Both of them give colour with iodine.

Question 3 of 15

4. Which of the following set of three items are not true as each set belongs to the category mentioned against them

Rennin, helicase and Hyaluronidase-Enzyme

Lysine, glycine, thiamine-Amino acids

Myosin, oxytocin and gastrin – Hormones

Optic nerve, occulomotor, vagus-Sensory nerves

Question 4 of 15

5. Which of the following gives Fehling’s test?

Pectin

Cellulose

Sucrose

Glucose

Question 5 of 15

6. Proteins are

Polynuckeotides

Polyglycol

Polysaccharides

Polyamides

Question 6 of 15

7. Which statement is true?

Adenine has 4 nitrogen atoms

Cytosine has 3 nitrogen atoms

Guanosine has 3 nitrogen atoms

Uracil has 5 nitrogen atoms

Question 7 of 15

8. Alpha-keratin is a protein, present in

Eggs

Skin

Lymph

Blood

Question 8 of 15

9. Gamma globulins are synthesized inside

Bone marrow

Lymph and lymphoid tissues

Kidney

Liver

Question 9 of 15

10. Which of the following contain β-1, 4 linkage?

Lactose

Sucrose

Maktise

Fructose

Question 10 of 15

11. Which is the derivative of amino acid?

Progesterone

Estrogen

Epinephrine

All of these

Question 11 of 15

12. An example of competitive inhibition of an enzyme is the inhibition of

Carbonic anhydrase by carbon dioxide

Hexokinase by glucose-6-phosphate

Succinic dehydrogenase by malonic acid

Cytochrome oxides by cyanide

Question 12 of 15

13.

The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme greengram-phosphatase. What does the graph indicate?

At higher substrate concentration the pH increases

Presence of an enzyme inhibitor in the reaction mixture

The rate of enzyme reaction is directly proportional to the substrate concentration

Formation of an enzyme-substrate complex

Question 13 of 15

14. The figure given below show three velocity substrate 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 – enzyme 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

Question 14 of 15

15. The total number of nitrogenous bases in human genome is estimated to be about

3.1 billion

35 million

3.5 million

35 thousand

Question 15 of 15

Test Name	Micro & Macro molecules Test
Subject	Biology
Test Type	MCQs
Total Question	15
Total Marks	30
Total Time	15 Mints
Test Help For	Biology Subject Test Prep. All Admission Test Preparation. All Medical Colleges Admission Test GRE Subject Test. Science Test preparation.

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