Chpt 20

Question 1

virus enters a cell, makes copies of itself, and causes the cell to burst. host cell is lysed and destroyed.

Answer 1

Lyctic Infection

Question 2

the viral DNA that is embedded in the host’s DNA.

Answer 2

Prophage

Question 3

small piece of circular DNA.

Answer 3

Plasmid

Question 4

protein coat surrounding a virus.

Answer 4

Capsid

Question 5

virus that contains RNA as their genetic information.

Answer 5

Retrovirus

Question 6

ball-shaped bacteria.

Answer 6

Cocci

Question 7

rod-shaped bacteria.

Answer 7

Bacilli

Question 8

spiral or corkscrew-shaped bacteria.

Answer 8

Spirilla

Question 9

(most animals including humans) take in organic molecules for both
energy and a supply of carbon.

Answer 9

Chemoheterotroph

Question 10

use sunlight for energy, but they also need to take in organic
compounds as a carbon source.

Answer 10

Photoheterotrophs

Question 11

use light energy to convert carbon dioxide and water to carbon
compounds and oxygen.

Answer 11

Photoautotrophs

Question 12

make organic compound molecules from carbon dioxide (they do not
require light as a source of energy).

Answer 12

Chemoautotrophs

Question 13

organisms that require a constant supply of oxygen in order to live.

Answer 13

Obligate Aerobes

Question 14

must live in the absence of oxygen.

Answer 14

Obligate anaerobes

Question 15

can survive with or without oxygen.

Answer 15

Facultative anaerobes

Question 16

a form of asexual reproduction where the bacteria divides in to two
identical cells.

Answer 16

Binary Fission

Question 17

a type of sexual reproduction in bacteria.

Answer 17

Conjugation

Question 18

structures called spores make it possible for some bacteria to survive harsh conditions.

Answer 18

Endospores

Question 19

recycle nutrients

Answer 19

Decomposers

Question 20

the process of converting nitrogen gas into a form plants can use.

Answer 20

Nitrogen Fixation

Question 21

virus that infects bacteria.

Answer 21

Bacteriophage