Biochemistry Mock Test 9

10%

Question 1 of 10

1. Repressors bind to ____________

Promoter

Operator

Hormone response element

Enhancer

Question 1 of 10

Question 2 of 10

2. Which of the following enzymes remove supercoiling in replicating DNA ahead of the replication fork?

Helicases

Primases

Topoisomerases

DNA polymerases

Question 2 of 10

Question 3 of 10

3. Changing twist from the relaxed state requires adding energy and increases the ____________

Strain over molecule

None of the above

Stress along molecule

Forces in molecule

Question 3 of 10

Question 4 of 10

4. Actinomycin D is an inhibitor of ____________

Transcription

Replication

Translation

None of the mentioned

Question 4 of 10

Question 5 of 10

5. Which of the following is true about DNA polymerase?

It can synthesize DNA in the 5’ to 3’ direction

It can synthesize mRNA in the 3’ to 5’ direction

It can synthesize DNA in the 3’ to 5’ direction

It can synthesize mRNA in the 5’ to 3’ direction

Question 5 of 10

Question 6 of 10

6. Cellular DNA is uncondensed throughout ____________

Telophase

Interphase

Prophase

Anaphase

Question 6 of 10

Question 7 of 10

7. Which of the following is the precursor for auxin?

Valine

Arginine

Tryptophan

Phenylalanine

Question 7 of 10

Question 8 of 10

8. Glutathione peroxidase contains a covalently bound ____________

Calcium atom

Magnesium atom

Copper atom

Selenium atom

Question 8 of 10

Question 9 of 10

9. RNA primer is removed from the Okazaki fragment by ____________

DNA polymerase II

DNA polymerase III

RNA polymerase

DNA polymerase I

Question 9 of 10

Question 10 of 10

10. The enzyme of E.coli is a nuclease that initiates the repair of double stranded DNA breaks by homologous recombination is?

RNA polymerase

DNA polymerase

DNA glycosylase

DNA ligase

Question 10 of 10