Exam 2

Question 1

An acquatic microbe that can grow only on the surface of water is probably which of the following?

Answer 1

A phototroph

Question 2

Nitrogen is a growth limiting nutrient for many microbes because…

Answer 2

only a few microbes can produce ammonia from N2 gas

Question 3

Which of the following bacteria can grow in a lab incubator at 37 degrees C on a typical petri platewith nutrient agar medium?

Answer 3

a mesophilic aerobe

Question 4

A colony forming unit is the number of cells….

Answer 4

that produce one colony

Question 5

Which of the following is an indirect method for measuring the number of microbes in a sample?

Answer 5

Turbidity

Question 6

Pleomorphic bacteria

Answer 6

vary in size and shape

Question 7

Which bacteria cell structure is responsible for separating the chromosomes during binary fussion?

Answer 7

Cytoplasmic membran

Question 8

Which of the following bacteria live in environments similar to those that may have existed on the early Earth?

Answer 8

Deeply branching bacteria

Question 9

Which firmicute bacterium forms endospores and causes tetanus?

Answer 9

Clostridium

Question 10

Listeria is responsible for….

Answer 10

contaminated milk and meat

Question 11

the fussion of two gametes produces a

Answer 11

zygote

Question 12

replication of DNA occurs during

Answer 12

interphase

Question 13

when mitosis occurs without cytokinesis, which of the following is produced?

Answer 13

Coencytes

Question 14

The …… is the entire interwoven mass of one multicellular fungal organism

Answer 14

mycelium

Question 15

Single-celled organisms called ciliates are….

Answer 15

protozoa

Question 16

viruses are primarily classified according to their….

Answer 16

type of nucleic acid

Question 17

put the following stages of lytic replication cycle in order from earliest to latest states?

Answer 17

Attachment, entry, synthesis, assembly, release

Question 18

the enzyme lysozyme is critical for which stage(s) of bacteriophage T4 infection cycle?

Answer 18

Attachment

Question 19

which of the following infectious particles DO NOT have protein in their structure?

Answer 19

Viroids

Question 20

What is the name of the human prion disease

Answer 20

variant Creutzfeldt-Jakob disease

Question 21

A(n) ______ culture referes to a pure culture

Answer 21

axenic

Question 22

A(n) ______ is the motile feeding form of protozoa

Answer 22

tropozoite

Question 23

A(n) ______ is the extracellular form of a virus

Answer 23

virion