Biology Answers

Discuss natural selection in action by citing a popular example.

(a) Distinguish between a virus, viroid and prion.

(b) What is a bacteriophage?

(c) What are the 3 basic viral shapes?

(d) During the lysogenic cycle of s virus, what happens to the viral nucleus acid after it is injected into the host cell?

1. What are the two components shared by all viruses?

2. Viruses are generally considered to be non living. Should viroids and prions also be viewed as non living. Why or why not?

3. A wart is caused by a virus that may lie dormant for years before any symptoms appear. Does this resemble a lytic or Lysogenic infection? Explain.

Where does glycolysis occur in the cell

Predict which of the following cellular processes would be directly affected by the improper functioning of mitochondria. Explain your choice(s). a) gain or loss of water by a cell b) facilitated diffusion of glucose into or out of a cell c) pumping ions by a sodium-potassium pump d) moving hydrogen ions (protons) against their gradient by a hydrogen ion pump *

1.During the lysogenic cycle of virus, what happens to the viral nucleic acid after it is injected into the host cell? [1]

2.Explain relationship between shingles and chickenpox. [2]

1. Viruses are generally considered to be non living. Should viroids and prions also be viewed as non living? Why [2]

2.A wart is caused by a virus that may lie dormant for years before symptoms appear. Does this resemble a lytic or lysogenic infection. Explain [2]

Give one gene of interest

How can we keep the application of recombinant DNA technologies ethica as a scientist, student, and as a citizen?