Which of the following characterize the Calvin cycle?
A. Produces oxygen
B. Produces glucose as an end product
C. Produces carbon dioxide and water
D. A process that requires light
E. Nitrogen is fixed into an organic form
Answer: B
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Scientists recently cloned Louis Pasteur and put him back to work in a modern lab. He promptly developed a gel that breaks down proteins. Since he hasn't been around for some time,
he's unsure what the best application for his invention might be. Help him out. What pathogenic item in this gel would be most effective and safe at eliminating? A. Viroids on the surface of agricultural plant tissues B. Prions inside the central nervous system of cows C. Viruses on the surface of the skin D. Bacteria in the intestines of human beings E. The fungus that causes athlete's foot between people's toes
Some individual hormones have so many different effects because
1.they influence gene transcription. 2.they trigger a second messenger system that produces a cascade of effects. 3.there are a great many different cells in different tissues that have specific receptors for the hormone. 4.the hormone is carried throughout the body and only a small amount is needed to produce its effect. 5.all of the choices
In which part of the chloroplast do the carbon fixation reactions take place?
a. lumen b. stroma c. granum d. mesophyll e. thylakoids
In a replication fork, how do the leading and lagging strands differ?
a. In the lagging strand, new DNA is synthesized 3?–5?. b. Each strand is replicated by a unique type of polymerase. c. The lagging strand is replicated discontinuously. d. DNA polymerase proceeds more slowly on the lagging strand. e. The lagging strand is subject to more error and requires more repair.