If a cell's DNA is damaged, the products of _____ genes interact to advance, delay, or stop the cell cycle
a. checkpoint
b. master
c. homeotic
d. onco
e. repair
a
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Studies of glucose transport in liposomes have revealed that:a
glucose is transported against a concentration gradient. b. the binding of glucose triggers a conformational change in the carrier protein. c. the transport of solutes via carrier proteins is faster than via channel proteins. d. glucose phosphates move readily across the membrane by simple diffusion. e. glucose moves readily across the membrane by simple diffusion
Why are there two fat feedback signals?
What will be an ideal response?
Which of the following would be found in a reptile but NOT in an amphibian?
a) mammary glands b) "jelly"-covered egg c) aquatic larva using gills to breathe d) internal fertilization
Which condition would be most likely to cause stomata to open?
A) high levels of carbon dioxide in a leaf B) hot, dry weather and strong winds C) sunrise on a clear morning D) a cool night setting in