Which group of eukaryotes LACK alveoli?
A) apicomplexans
B) ciliates
C) dinoflagellates
D) oomycetes
Answer: D
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Which of the following levels of ecological organization is arranged in the correct sequence from most to least inclusive?
A) community, ecosystem, organism, population B) ecosystem, community, population, organism C) population, ecosystem, organism, community D) organism, population, community, ecosystem E) organism, community, population, ecosystem
What will happen to a cyanobacterium that has its photosystem II (PSII) blocked?
A) Additional electron acceptors, such as NADP+, will be required to oxidize oxygen and overcome the lost PSII process. B) Anoxygenic photosynthesis only using photosystem I (PSI) could occur by using cyclic photophosphorylation and an alternative electron donor such as H2S. C) It will die from being unable to obtain energy for photosynthesis. D) Photons will generate excessive reactive oxygen species and the cyanobacterium will die as a consequence.
Place the following events of bacterial conjugation in order from first to last.
a - DNA replication b - an enzyme joins F factor DNA ends c - sex pilus shortens d - DNA transfer e - an enzyme cuts F factor DNA A. a, b, c, d, e B. c, e, d, b, a C. e, a, c, d, b D. c, e, a, d, b E. c, e, a, b, d
What is the molecular basis of familial hypercholestremia?
a. HDL enters cells using a specific receptor on the cell surface d. LDL exits cells using a specific receptor on the cell surface b. LDL enters cells using a specific receptor on the cell surface e. receptor-mediated exocytosis c. HDL exits cells using a specific receptor on the cell surface