Four of the five choices listed below are features of
plasma membrane extensions. Select the exception.
a. amyloplast
b. centriole
c. microtubule
d. basal body
e. 9 + 2 array
Answer: a
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During glycolysis a single glucose molecule is converted into two ____________________ molecul Fill in the blank(s) with the appropriate word(s)
Which of the following is a correct statement about sugar movement in phloem?
a) Only phloem cells with nuclei can perform sugar movement. b) Sugar is translocated from sinks to sources. c) Movement can occur both upward and downward in the plant. d) Sugar transport does not require energy. e) Diffusion can account for the observed rates of transport.
The initial effect of ionizing radiation on a cell is that it causes
A) DNA to break. B) bonding between adjacent thymines. C) base substitutions. D) the formation of highly reactive ions. E) the cells to get hot.
Color blindness is caused by heritable mutations in cone photoreceptors. How many cone types does the retina of a colorblind individual typically contain?
A. Only one B. Two C. Three D. Four E. Five