Molecular Biology Mock Test 7

10%

Question 1 of 10

1. Once the tRNA is aminoacylated, EF-Tu binds to the tRNA at the ____________

Variable loop of tRNA

Amino acid

5’ end of the tRNA

3’ end of the tRNA

Question 1 of 10

Question 2 of 10

2. The cAMP-dependent protein kinase has how many subunits?

Question 2 of 10

Question 3 of 10

3. Nonsense mutation is also known as ___________

Missense mutation

Stop mutation

Frame shift mutation

Reverse mutation

Question 3 of 10

Question 4 of 10

4. The regulatory molecules bind to the catalytic site of an enzyme to regulate its activity.

False

True

Question 4 of 10

Question 5 of 10

5. Which of the following about the enhancers is false?

They function as promoter sequences

They function in orientation

They are tissue specific

They work as both cis and trans-acting sequences

Question 5 of 10

Question 6 of 10

6. The activation of GTPase activity of the enzyme EF-Tu occurs after its binding to the aminoacylated tRNA.

False

True

Question 6 of 10

Question 7 of 10

7. Enhancers are a unit of multiple functional sequence elements that together regulates the expression of a gene.

False

True

Question 7 of 10

Question 8 of 10

8. Which of the following is true about tryptophan operon?

Tetramer of identical subunits

The RNA product is very stable

The Trp repressor binds to the tryptophan

The Trp repressor is the product of the Trp operon

Question 8 of 10

Question 9 of 10

9. Ubiquitin degradation mechanism recognizes ____________

Nuclear protein

Cytosolic protein

Both cytosolic and nuclear proteins

Structural protein

Question 9 of 10

Question 10 of 10

10. In O-linked glycoproteins, the carbohydrates may be attached to how many amino acids?

Question 10 of 10