Biology

1. mark review An example of competitive inhibition of an enzyme is the inhibition of

Hexokinase by glucose-6-phosphate

Carbonic anhydrase by carbon dioxide

Cytochrome oxides by cyanide

Succinic dehydrogenase by malonic acid

Question 1 of 15

2. mark review Which statement is true?

Cytosine has 3 nitrogen atoms

Adenine has 4 nitrogen atoms

Guanosine has 3 nitrogen atoms

Uracil has 5 nitrogen atoms

Question 2 of 15

3. mark review Which is the derivative of amino acid?

Epinephrine

Estrogen

All of these

Progesterone

Question 3 of 15

4. mark review Alpha-keratin is a protein, present in

Skin

Lymph

Blood

Eggs

Question 4 of 15

5. mark review Which of the following contain β-1, 4 linkage?

Sucrose

Fructose

Maktise

Lactose

Question 5 of 15

6. mark review Apoenzyme is

Sugar

Protein

Vitamin

Lipid

Question 6 of 15

7. mark review Gamma globulins are synthesized inside

Bone marrow

Liver

Kidney

Lymph and lymphoid tissues

Question 7 of 15

8. mark review

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

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

Formation of an enzyme-substrate complex

Presence of an enzyme inhibitor in the reaction mixture

Question 8 of 15

9. mark review Which of the following gives Fehling’s test?

Cellulose

Pectin

Glucose

Sucrose

Question 9 of 15

10. mark review 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 10 of 15

11. mark review Michaelis constant K_m is equal to

K₂ – K₃/K₁

K₁ x K₂/ K₃

K₁/K₂ – K₃

K₂ + K₃/K₁

Question 11 of 15

12. mark review Which one of the following statements regarding starch and cellulose is not correct?

Both of them are made up of glucose molecules

Both of them are of plant origin.

Both of them give colour with iodine.

Both of them are polymers

Question 12 of 15

13. mark review Proteins are

Polysaccharides

Polyglycol

Polyamides

Polynuckeotides

Question 13 of 15

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

Optic nerve, occulomotor, vagus-Sensory nerves

Rennin, helicase and Hyaluronidase-Enzyme

Myosin, oxytocin and gastrin – Hormones

Lysine, glycine, thiamine-Amino acids

Question 14 of 15

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

35 thousand

3.1 billion

3.5 million

35 million

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.

Test By Subject	Biology
Test By Topics	Biology Subject

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