A toxic substance has been found to inhibit glucose transport into mammalian cells. If this substance is administered
to a hamster, the likely cause of death would be a lack of ____ production.
a. NAD+
b. ATP
c. GTP
d. CO2
e. FAD
ANSWER: b
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Chaperone-type proteins that stabilize other proteins in response to environmental stresses such as salinity, drought,
heat, and cold are ____.
a. systemins b. phytoalexins c. PR proteins d. R genes e. heat-shock proteins
One hypothesis proposes that an asteroid impact at the end of the ___________ led to the extinction of dinosaurs. Fill in the blank(s) with the appropriate word(s)
The major types of molecules found in the membrane are
1.sugars and lipids. 2.lipids and proteins. 3.lipids and DNA. 4.lipids and RNA. 5.proteins and DNA.
What is a disadvantage of the exoskeleton?
a. It cannot be replaced if damaged. b. It must be shed to accommodate growth. c. It is easily penetrated by predators. d. It requires high ATP levels for continuous growth. e. It does not permit movement of the organism.