What type of reaction occurs during photosynthesis when hydrogen atoms are transferred from water to carbon
dioxide to form a carbohydrate?
a. redox reaction
b. anaerobic reaction
c. catabolic reaction
d. oxidation reaction
e. hydrolytic reaction
a
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Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal?
A) Sodium and glucose compete for the same binding site in the cotransporter. B) Glucose entering the cell down its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient. C) Sodium ions can move down their electrochemical gradient through the cotransporter whether or not glucose is present outside the cell. D) The cotransporter can also transport potassium ions. E) A substance that blocks sodium ions from binding to the cotransport protein will also block the transport of glucose.
Nematode worms and annelid worms share which of the following features?
A) a digestive tract with two openings (a mouth and an anus) B) molting C) presence of a circulatory system D) presence of segmentation E) absence of species with parasitic lifestyles
The autoclave treatment may be monitored by
A. heat-sensitive tape. B. heat-resistant endospores of Geobacillus stearothermophilus. C. pressure indicators alone. D. waiting for contaminants to appear on freshly poured media. E. heat-sensitive tape AND heat-resistant endospores ofGeobacillus stearothermophilus.
The pattern of distribution for a certain species of kelp is clumped. The pattern of distribution for a population of snails that live on the kelp would be
A) clumped. B) random. C) uniform.