Friedrich Miescher is credited with _____
a. proposing DNA as the hereditary material
b. finding that proteins are the physical basis of inheritance
c. defining the laws of inheritance
d. being the first person to describe and extract DNA
e. determining that proteins are composed of unlimited combinations of twenty amino acids
ANSWER: d
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A cell cycle checkpoint for S phase would likely inhibit progression through the cell cycle if _____
a. there are not enough proteins for division to continue b. ATP supply in the cell is low c. there is DNA damage d. the temperature of the cell is too low e. surrounding cells are dividing
Cellular slime molds can be distinguished from
plasmodial slime molds on the basis of a. reproductive structures. b. spore formation. c. number of nuclei per cell. d. slime trails. e. food requirements.
Metaphase II arrest is mediated by ________, a biochemical activity present in mature eggs
Fill in the blank with correct word.
The carrying capacity of an area decreases if
A. the waste products are not removed. B. the birthrate lowers. C. more food is available. D. All of these answers are true.