Consider the Calvin-Benson cycle and the noncyclic photosynthetic pathway. Why is the cyclic
pathway so important? What will be an ideal response?
The Calvin-Benson cycle uses 18 ATP and 12 NADPH to produce one molecule of glucose. But, the
noncyclic photosynthetic pathway produces ATP and NADPH at a one-to-one ratio. As a result there
would be insufficient ATP. But the cyclic pathway produces only ATP, thus allowing the extra ATP
to be produced
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What term describes a relationship in which two species have a prolonged close association?
a. symbiosis b. commensalism c. mutualism d. predation e. parasitism
DNA replication involves all of the following steps except
a. separation. b. joining. c. production of single-stranded DNA molecules. d. complementary base pairing. e. polymerization.
What does DNA ligase do?
a. breaks the hydrogen bonds between base pairs b. seals gaps between assembled nucleotides c. provides energy for nucleotide assembly d. acts as an initiator to start the replication process e. seals the ends of the replicated DNA molecule
How many cholera bacteria must be ingested in order to become ill?
a. 100,000 b. 500,000 c. 1,000,000 d. 10,000,000 e. 100,000,000