Photorespiration _____
A) generates carbon dioxide and consumes ATP and oxygen
B) generates ATP and sugars and consumes oxygen and carbon dioxide
C) generates oxygen and consumes ATP, carbon dioxide, and sugars
D) consumes carbon dioxide and generates ATP, sugars, and oxygen
A
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In mitosis, the main difference between plant and animal cells is that
A. plants do not undergo cytokinesis. B. plants produce a cell plate to segregate the daughter nuclei, while animals form a cleavage furrow. C. plants have a central vacuole, while animal cells do not. D. plants produce a cell membrane in cytokinesis, while animals form a cell plate. E. in plants, kinetochore microtubules shorten and draw chromosomes toward the poles; in animals, polar microtubules lengthen to push chromatids apart.
In order for something to be considered a skeleton, it must contain bone or some other hard substance.
Answer the following statement true (T) or false (F)
How is the 4-letter language of nucleic acids converted into the 20-word language of amino acids?
a. The 4 nucleic acid bases combine in 2-letter combinations that define different amino acids. b. The 4 nucleic acid bases combine in 3-letter sequences that define different amino acids. c. Triplets of the 2-letter nucleic acid bases are translated into the 20 different amino acids. d. The 4 bases each specify 1 amino acid, which give rise to the remaining 16 amino acids. e. The 4 bases are first converted into tRNA molecules, which can each attach to 5 amino acids.
What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?
A) All plants would experience increased rates of photosynthesis. B) C3 plants would have faster growth; C4 plants would be minimally affected. C) C4 plants would have faster growth; C3 plants would be minimally affected. D) C3 plants would have faster growth; C4 plants would have slower growth.