In order for a substance to transfer a phosphate to ADP in a substrate-level phosphorylation reaction, which of the following must be true?
A. The phosphate donor must have a lower oxidation-reduction potential than ATP.
B. The phosphate donor must have a higher oxidation-reduction potential than ATP.
C. The phosphate donor must have a higher phosphate transfer potential than ATP.
D. The phosphate donor must have a lower phosphate transfer potential than ATP.
Answer: C
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If isolated plant cells with a water potential averaging -0.5 MPa are placed into a solution with a water potential of -0.3 MPa, which of the following would be the most likely outcome?
A) The pressure potential of the cells would increase. B) Water would move out of the cells. C) The cell walls would rupture, killing the cells. D) Solutes would move out of the cells. E) The osmotic pressure of the cells would decrease.
Which one of the following sexually transmitted diseases is characterized by a primary phase that affects the genitals, and secondary and tertiary phases that spread throughout the body?
A) chlamydia B) genital warts C) hepatitis B D) syphilis E) gonorrhea
In human ABO blood types, what description applies to the alleles for A and B because they're both expressed?
What will be an ideal response?
Water ecosystems become eutrophic when there is ________.
A. nutrient enrichment of waters B. acidification of waters C. nutrient removal from waters D. deoxygenation of waters