According to the accompanying figure, what is the order in which the genes will be transferred to an F- cell during
conjugation?
a. c-d-a-b
b. d-a-b-c
c. b-c-d-a
d. a-b-c-d
e. d-c-b-a
ANSWER: d
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The KN-1 gene in maize is normally expressed
a. in primary meristems, where it initiates the process of differentiation. b. in apical meristems, where it maintains the undifferentiated state. c. in apical meristems, where it initiates the process of differentiation. d. in primary meristems, where it maintains the undifferentiated state. e. in lateral meristems, where it initiates the process of secondary growth.
A chemostat is continuous culture system that is designed to promote and prolong exponential growth and prevent bacteria from entering stationary phase. How might this work?
a. Chemostats include detoxifying agents that inactivate growth-inhibiting toxins that develop during continued microbial growth. b. Chemostats provide a continued source of fresh nutrients and remove wastes and dead bacterial cells. c. Chemostats promote the formation of endospores, which enable the long-term survival of the bacteria. d. Chemostats include growth-promoting agents that prolong microbial growth.
Protein is typically part of the globular filtrate.
a. true b. false
On the pH scale, numbers below 7 indicate acidic solutions
Indicate whether the statement is true or false