Biochemistry Mock Test 10

10%

Question 1 of 10

1. Which of the following regulatory sequence allows transcription to continue?

Sequence 1

Sequence 4

Sequence 3

Sequence 2

Question 1 of 10

Question 2 of 10

2. Which of the following is not the classified form of conjugated proteins?

Glycoproteins

Metalloproteins

Lipoproteins

Complete proteins

Question 2 of 10

Question 3 of 10

3. In 3° structure of proteins, folding and shaping is done by ____________

Polar interactions

None of the mentioned

Hydrogen bonding

Hydrophobic interactions

Question 3 of 10

Question 4 of 10

4. What does it mean when we say that water acts as a “heat buffer”?

It increases the temperature of an organism as the temperature of the surroundings increases

It keeps the temperature of an organism relatively constant as the temperature of the surroundings fluctuates

It decreases the temperature of an organism as the temperature of the surroundings increases

It increases the temperature of an organism as the temperature of the surroundings decreases

Question 4 of 10

Question 5 of 10

5. Which of the following inactivates the 60S subunit of eukaryotic ribosomes?

Chloramphenicol

Cycloheximide

Ricin

Diphtheria toxin

Question 5 of 10

Question 6 of 10

6. The lactose repressor is encoded by ____________

Lac-l

Lac-Y

Lac-A

Lac-Z

Question 6 of 10

Question 7 of 10

7. In which of the following cases the first base of anticodon pairs with two codons?

When the first base of anticodon is inosine

When the first base of anticodon is A or G

When the first base of anticodon is A or C

When the first base of anticodon is G or U

Question 7 of 10

Question 8 of 10

8. Which of the following does not affect the stability of an α-helix?

Occurrence of alanine and glycine residues

Electrostatic repulsion

Interaction between R groups spaced three residues apart

Bulkiness

Question 8 of 10

Question 9 of 10

9. Bacteria have ____________

50S ribosomes

60S ribosomes

80S ribosomes

70S ribosomes

Question 9 of 10

Question 10 of 10

10. The eukaryotic mRNA binding to the ribosomes is facilitated by ____________

T-RNA

Shine Dalgarno sequence

Poly-A tail

7-methyl guanosine cap

Question 10 of 10