Cyclins are a family of closely related proteins that
A) regulate the cell cycle.
B) produce p53.
C) cause cancer.
D) work to heal wounds.
Ans: A) regulate the cell cycle.
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Volume is the measurement of
(a) a line, extending from one point to another. (b) the space an object occupies. (c) the quantity of matter present in an object. (d) the degree of hot or cold of an object.
Answer the following statements true (T) or false (F)
1. The electronegativity of an atom is a measure of its ability to attract electrons to its outer shell from another atom. 2. Table salt forms from sodium and chloride via hydrogen bonding. 3. Molecules are generally rigid structures and rarely change shape. 4. The presence of salt helps prevent oceans from freezing.
Very small and very large human newborns are less likely to survive than those born at an intermediate weight due to
____.
a. sexual selection b. artificial selection c. disruptive selection d. directional selection e. stabilizing selection
The most detailed image of the surface of a cell would be found on a ____
a. light micrograph from a phase contrast microscope b. transmission electron micrograph c. scanning electron micrograph d. light micrograph from a light microscope e. transmission electron micrograph