Which plant cell structure is comprised of approximately 300 chlorophyll molecules and about 40 carotenoid
pigments, organized together to optimize the capture of light energy?
a. reaction center
b. chlorophyll
c. antenna complex
d. cytochrome complex
e. stomata
ANSWER: c
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Which of the following is an aggregate fruit?
a. peas b. acorns c. pineapples d. strawberries e. cherries
Amniocentesis involves sampling
a. the fetus directly. b. the fetal cells floating in the amniotic fluid. c. sperm. d. blood cells. e. placental cells.
Which of the following carries amino acids to ribosomes, where amino acids are linked into the
primary structure of a polypeptide? a. mRNA b. tRNA c. hnRNA d. rRNA e. rDNA
The process of carbon dioxide fixation refers to ________.
A. reaction of carbon dioxide with water to form carbonic acid B. release of carbon dioxide during catabolic reactions C. release of carbon dioxide during anabolic reactions D. reduction of carbon dioxide and incorporation into organic molecules that are assimilated