A somatic cell from a corn plant normally contains 20 chromosomes. How many sister chromatids would that cell contain during G2 of the cell cycle?
A. 20
B. 10
C. 40
D. 0
Answer: C
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Which regulatory mechanism is important in keeping glycolysis and the citric acid cycle in relative balance to each other?
A. Citrate inhibits phosphofructokinase 1. B. ADP up-regulates phosphofructokinase 1. C. ATP inhibits phosphofructokinase 1. D. AMP inhibits phosphofructokinase 1.
The ___ Echinoderm lineage is composed of sea stars, each with a central disk surrounded by 5 to 20 "arms."
a. Echinoidea b. Ophiuroidea c. Crinoidea d. Holothuroidea e. Asteroidea
The USDA's nutrition plate indicates that as a guideline, about __________ of your dietary plate should contain fruits and vegetables.
A. 25% B. 75% C. 33% D. 50%
Sporulation generally occurs under which of the following circumstances?
A) when conditions are unfavorable or there are insufficient nutrients B) when microbes are exposed to a new, favorable environment C) when microbes are under little stress and can become dormant D) when resources become highly abundant