Biochemistry Mock Test 2

10%

Question 1 of 10

1. Which of the following is false about lysozyme?

The substrate of lysozyme is peptidoglycan

It is an antibacterial agent found in tears and egg white

It is a bisubstrate enzyme

Lysozyme cleaves (β1 → 4) glycosidic C-O bonds between two types of sugar residue in the molecule NAM and NAG

Question 1 of 10

Question 2 of 10

2. Which of the following is the smallest division?

Filament

Fibril

Fiber

Actin

Question 2 of 10

Question 3 of 10

3. Which of the following antibody first reaches the site of infection?

IgM

IgE

IgG

IgA

Question 3 of 10

Question 4 of 10

4. Contractile protein of a muscle is __________

Troponin

Myosin

Tropomyosin

Tubulin

Question 4 of 10

Question 5 of 10

5. His⁹³ is also called ________

His F5

His F8

His F7

His F6

Question 5 of 10

Question 6 of 10

6. Where do T-lymphocytes develop into fully competent but not activated T-cells?

The thymus gland

The bone marrow

The thyroid gland

The lymph nodes

Question 6 of 10

Question 7 of 10

7. Which of the following enzyme catalyzes a reaction that introduces reduced nitrogen ito cellular metabolism?

Bacterial dinitrogenase reductase

Bacterial glutamine synthase

Phosphatase

Bacterial dinitrogenase oxidase

Question 7 of 10

Question 8 of 10

8. Which of the following is false about allosteric feedback inhibition?

Conversion of L-leucine to L-isoleucine

If the isoleucine concentration decreases, the rate of threonine dehydration increases

Bacterial enzyme system is the first known example

Threonine dehydratase is inhibited by isoleucine

Question 8 of 10

Question 9 of 10

9. In the binding of oxygen to myoglobin, the relationship between the concentration of oxygen and the fraction of binding sites occupied can best be described as ___________

Parabolic

Linear with a positive slope

Linear with a negative slope

Hyperbolic