little explanations with each answers please SAMPLE PROBLEMS (S-2; K) 1. Which b

Question

little explanations with each answers please

SAMPLE PROBLEMS (S-2; K) 1. Which best describes a DNA virus? d. It lacks RNA. e. It has complex symmetry. a. It is an animal virus. b. Its genome is double stranded. c. It has a plant host A virus that infects corn (Zea mays) must be classified as a(n) a. DNA virus b. RNA virus c. phage. (5-2; K) 2. d. animal virus e. plant virus. Which describes a rod-shaped virus? a. It must have DNA as the genetic material. b. It must have RNA as the genetic material. c. It has both DNA and RNA as the genetic material d. It has helical symmetry. e It has 70S ribosomes (S-3; U) 3. (5-3; U) 4. What is contained in the capsid? a. viral genome b. host genome c. tail d. envelope e. flagella Which occurs first during the lytic cycle of phages? a. penetration b. attachment c. release (5-4; U) 5. d. biosynthesis of viral components e. viral assembly What is a prophage? a. b. c. d. (5-5; U) 6. It is an infectious bacteriophage. It is the free DNA of a lytic phage. It is the DNA of a temperate phage contained in the host genome. It is ssDNA.

Explanation / Answer

1)- option e is correct because they have icosahedral , helical or complex symmetry.

2)- option b is correct because maize chlorotic mottle virus infect Zea mays which is an RNA virus.

3)- option a is correct because it have linear dsDNA genome.

4)-option a is correct because it encloses the genetic material of viruses.

5)- option b is correct because the first stage of lytic cycle is attachment.

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