What strategy does the body use for blood glucose homeostasis?
A. release of hormones by the brain
B. energy stores in bone allow for quick glucose release
C. glucose usage by the brain is shut down when necessary
D. the action of two antagonistic effectors
D. the action of two antagonistic effectors
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As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find that 30,000 molecules of ATP were consumed, but only 20,000 molecules of NADPH were consumed. Where did the extra ATP molecules come from?
A) photosystem II B) photosystem I C) cyclic electron flow D) linear electron flow E) chlorophyll
Somatic cell nuclear transfer is a type of
a. embryo cloning. b. adult cloning. c. therapeutic cloning. d. artificial twinning. e. stem cell cloning.
The fact that RNA can catalyze reactions necessary for replication gave rise to:
a. microspheres. b. biodiversity. c. protein synthesis. d. the RNA world hypothesis. e. the Urey-Miller experiment.
In humans, genes make up ______ percent of the DNA.
A) less than 5 B) about 10 C) about 50 D) 100 E) about 75