Which stage of photosynthesis, if any, can function in the dark?
A. Stage 2 (the Calvin cycle)
B. Stage 1 (the light reactions)
C. Both Stage 1 (the light reactions) and Stage 2 (the Calvin cycle)
D. Neither Stage 1 (the light reactions) nor Stage 2 (the Calvin cycle)
Answer: A
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Nurse cells
A. transcribe bicoid mRNA and then transport it to the embryo. B. translate bicoid mRNA into protein. C. induce the embryo to transcribe and translate bicoid mRNA. D. transport Bicoid protein to the embryo. E. translate bicoid mRNA into protein and transport the protein to the embryo.
Which best describes the energy of activation?
a. A type of exergonic reaction b. A type of endergonic reaction c. The energy required to break existing bonds d. The catalysts needed to raise a reaction's rate e. The enzymes required to lower a reaction's rate
What is most likely to occur when an individual is exposed to UV radiation?
A. The melanocytes will produce melanin, the melanin is distributed into epidermal cells, a steroid is converted into vitamin D and stem cells can mutate leading to cancer. B. The melanin will produce melanocytes, the melanocytes are then distributed into epidermal cells, a steroid is converted into vitamin D and stem cells can mutate leading to cancer. C. The melanocytes will produce melanin, the melanin is distributed into epidermal cells, vitamin D is converted into a steroid and stem cells can mutate leading to cancer. D. The melanocytes will produce melanin, the melanin is distributed into dermal cells, a steroid is converted into vitamin D and stem cells can mutate leading to cancer.
A type of active transport is
A. diffusion B. membrane assisted transport C. osmosis D. facilitated transport (movement from high to low concentration requiring the assistance of a protein).