Molecular Biology Quiz 46 (20 MCQs)

Quiz Instructions

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1. How do food and nutrients like vitamins, along with exercise, affect thehuman body?

Correct Answer: C) They help people maintain their health.

2. Which of the following are proteins?I CollagenII GlycogenIII InsulinIV Immunoglobulins

Correct Answer: B) I, III and IV only.

3. A mutation in which only one nucleotide is altered is called a:

Correct Answer: C) Point Mutation.

4. Scientists who first determined that DNA is the genetic material were led by

Correct Answer: A) Oswald Avery.

5. In gel electrophoresis the ..... charge is close to the wells and the ..... charge is on the opposite end because phosphates are .....

Correct Answer: D) Positive, negative, negative.

6. Which of the following correctly represents the pathway taken by the genetic code during protein synthesis?

Correct Answer: A) DNA-mRNA-ribosome-tRNA-protein.

7. Using a virus to enter a cell and replace defective genes with healthy genes is called

Correct Answer: D) Gene therapy.

8. What bio molecule do mutations first manifest themselves in?

Correct Answer: C) DNA.

9. Experiment that radioactively labeled the proteins and DNA of bacteriophages to determine if DNA or protein was the transforming agent

Correct Answer: D) Hershey & Chase.

10. Before cells can divide, what must be copied?

Correct Answer: C) DNA.

11. Between which atoms do hydrogen bonds form in water?

Correct Answer: B) Oxygen and hydrogen atoms in different water molecules.

12. The enzyme that creates m-RNA

Correct Answer: C) RNA polymerase.

13. The process by which one strain of bacterium is apparently changed into another strain is called

Correct Answer: B) Transformation.

14. Assembles RNA during transcription

Correct Answer: A) RNA Polymerase.

15. Which is likely to occur if an individual consumes an abundance of carbohydrates but remains very inactive?

Correct Answer: D) Extra glucose is stored as body fat, causing weight gain.

16. Why are plasmids sometimes given an antibiotic resistance gene?

Correct Answer: C) So that scientists can identify which cells have the rDNA plasmid.

17. Part of the base sequence of a mRNA molecule is:UACGGAWhat is the base sequence of the DNA sense strand that corresponds to this?

Correct Answer: D) TACGGA.

18. How much ATP does cellular respiration ideally make?

Correct Answer: D) 36 ATP.

19. What is required to replicate DNA?

Correct Answer: B) Free nucleotides carrying A, C, G and T bases.

20. The first step of transcription is

Correct Answer: C) Initiation.