Egg-laying mammals ____
a. hatch fully developed young from their eggs
b. are monotremes
c. are hairless
d. are confined to South America
e. bear their young into permanent pouches
ANSWER: b
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During photorespiration, which of the following molecules acts as a substrate for the rubisco enzyme?
A. CO2 B. O2 C. H2O D. N2
P53 is a ____
a. transcription factor that turns on expression of cell division inhibiting proteins b. protein encoded by an oncogene c. protein that promotes entry into the cell cycle when DNA is undamaged d. hormone used to treat cancer e. growth promoting factor
Salted and pickled foods can last unrefridgerated for many years because
A. the extreme salt or pH concentration denatures the proteins, including enzymes. B. the concentration gradient of salt or vinegar causes osmosis into the food. C. equilibrium with the environment has occured. D. the concentration gradient of salt or vinegar causes osmosis out of the food. E. the concentration gradient of salt or vinegar causes osmosis out of the food and the extreme salt or pH concentration denatures the proteins, including enzymes.
An example of a homology is that birds and humans are both bipedal.
a. true b. false