Quiz 5

Question 1

___________ is the name of the genus of gram-positive rod-shaped bacteria used in the production of fermented milk products.

Answer 1

Lactobacillus

Question 2

The genus ___________ contains species of bacteria that divide in three perpendicular planes to yield packets of eight or more cells.

Answer 2

Sarcina

Question 3

Based on metabolism and on oxygen requirements, teh genus Clostridium is classified as ________ and _______.

Answer 3

Fermentative, anaerobic

Question 4

The homofermentative genus of lactic acid bacteria that contains organisms of dairy significance is:

Answer 4

Lactococcus

Question 5

How is Agrobacterium tumefaciens used in biotechnology?

Answer 5

It is used to genetically modify plants because it inserts tumor-producing genes into the plant, but the turmor-producing genes are replaced with a gene of interest such as insecticide.

Question 6

In what types of food are Clostridium botulinum endospores typically found?

Answer 6

Vegetables

Home-canned foods

Question 7

All endospore-forming bacteria are ecologically related because they are found in nature primarily in:

Answer 7

soil

Question 8

How does botulism toxin cause flaccid paralysis?

Answer 8

It attacks neuromuscular junction which causes paralysis. The muscles no longer communicate with neurons and death occurs from suffication (paralysis of the diaphragm)