Which of the following statements is TRUE
about NADPH?
a. It is an enzyme.
b. It is the oxidized form of NADP+.
c. It is generated n the light-dependent
reactions of photosynthesis.
d. It accepts hydrogen and electrons from
carbohydrates.
e. It obtains energy from ATP.
C
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An intrauterine device works to prevent pregnancy by _____
a. changing the pH of the uterus so sperm cannot live b. changing the chemistry of the uterus so sperm cannot live c. interfering with sperm movement or implantation d. killing sperm e. preventing ovulation
If you were to design a long-term research study to determine why there are no human births in Lapland during the months of August, September, and October, you would need to also examine a comparison population of humans in which births took place every month. The primary reason for including a comparison population within the design of this experiment would be to:
A. test the effects of more than one variable at the same time. B. act as a control that would ensure that the results obtained are due to a difference in only one variable. C. prove that there are no births in Lapland during August, September, and October. D. accumulate more facts that could be reported to other scientists.
In addition to underground roots, cycads produce about ground corraloid roots that resemble branching coral. These roots harbor
a. weevils b. green algae c. ovules d. cyanobacteria e. endophytic fungi
The capacity for some tRNAs to recognize more than one codon in mRNA is explained by a phenomenon called
a. redundancy. b. wobble. c. a reading frameshift. d. degeneracy.