What type of signal transduction process is first initiated when an odorant binds with a receptor on a cilium of an
olfactory receptor?
a. Ionotropic receptors lead to the synthesis of cyclic AMP.
b. G protein receptors lead to the synthesis of cyclic AMP.
c. Ca2+ gated chloride channels lead to the synthesis of cyclic AMP.
d. Ionotropic receptors lead to the activation of G proteins.
e. Cyclic AMP gated channels lead to the activation of G proteins.
b
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Which of the following does not influence the strength of a stimulus?
1.frequency of action potentials 2.how many axons are responding 3.size of the action potentials 4.which axons are responding
A correct equation for photosynthesis is
A. SUN + 6O2 + 6CO2 ® C6H12O6 + 6H2O. B. SUN + C6H12O6 + 6O2 ® 6CO2 + 6H2O. C. SUN + 6CO2 + 6H2O ® C6H12O6 + 6O2. D. SUN + 6CO2 ® 6H2O + C6H12O6 + 6O2.
A human cell has a mutation in the gene that encodes the enzyme that generates lactate from pyruvate, rendering that enzyme completely non-functional. Assuming that there is ample glucose present, how would this cell generate energy in the presence of oxygen?
A. aerobic respiration B. glycolysis coupled with ethanol fermentation C. primarily through the break down of proteins into amino acids D. This cell would have no way to generate energy under these conditions because it cannot carry out the reactions needed for glycolysis
Auxin is a plant hormone that causes cells to shorten and allow plant growing tips to move toward the sun.
Answer the following statement true (T) or false (F)