The process of transcription refers to the use of information encoded in ____ to make ____
a. RNA; a complementary DNA copy
b. DNA; a polypeptide
c. DNA; a complementary RNA copy
d. a polypeptide; RNA
e. RNA; a polypeptide
ANSWER: c
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Four of the five flower responses listed below follow
24-hour cycles. Select the exception. a. solar tracking b. flowers open in the morning c. circadian rhythm d. photoperiodism e. flowers close at night
12 H2O + 12 NADP+ + 18 ADP + Pi ? 6 O2 + 12 NADPH + 18 ATP summarizes the __________
reactions of photosynthesis. a. carbon fixation b. light-dependent c. light-independent d. CAM e. electron transport
Speciation, or the formation of new species, is
A) a form of microevolution. B) responsible for the diversity of life. C) necessary for natural selection and adaptation. D) an event that has occurred only a few times in the history of the planet.
Low levels of the neurotransmitter dopamine can lessen the ability to focus effectively on tasks. However, high levels of dopamine can result in feelings of motivation. How would you classify dopamine and why?
A) Dopamine is excitatory because it enhances motivation levels. B) Dopamine is inhibitory because it diminishes the ability to focus. C) Dopamine is both inhibitory and excitatory because it can enhance motivation levels but diminish the ability to focus.