Which of the following is NOT a characteristic of shade leaves on a plant?
A. less mesophyll tissue
B. lacking an epidermal layer
C. more air spaces
D. more chlorophyll production
Answer: B
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What is the main benefit of having hemoglobin in the blood?
A. It increases the amount of oxygen that can be carried in the blood. B. It keeps oxygen separated from carbon dioxide within the blood. C. It increases the solubility of carbon dioxide in the blood plasma. D. It is an important source of iron for body cells. E. All of the answer options are correct.
Arrestin binding to GPCRs __________.
a) causes the binding of additional G proteins b) stabilizes G proteins c) causes denaturation of G proteins d) stabilized GPCRs e) prevents further activation of additional G proteins
Which of the following can be sensed by plants? I) gravity II) pathogens III) wind IV) light
A) only I and III B) only I, II, and IV C) only II, III, and IV D) I, II, III, and IV
Enzymes work to speed up a chemical reaction by:
A) increasing the activation energy of the reaction. B) lowering the activation energy of the reaction. C) heating up the substrate. D) attaching coenzymes to the substrate. E) supplying the energy needed for the reaction.