When looking at plant and animal cells with an electron microscope, you notice that the plant cells have more Golgi membranes than the animal cells. This is most likely because unlike in animal cells, in plant cells the Golgi apparatus is involved in the production of:
A. chloroplasts.
B. mitochondria.
C. cytoplasm.
D. cell walls.
Answer: D
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How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?
A. 0 because mRNA has only anticodons B. 6 C. 27 D. 9 E. 3
Adenylyl cyclase catalyzes the reaction in which:a
PIP2 is split. b. ATP is converted to cAMP. c. GTP is converted to GDP. d. a protein is phosphorylated. e. calcium ions bind calmodulin.
Clostridium perfringens infections are commonly associated with:
A. antibiotic treatment. B. immunosuppression. C. preexisting lung disease. D. contamination of wounds. E. consumption of water contaminated with sewage.
Mammals and birds are descendents of reptiles, but are not included within the taxon Reptilia. As a taxon Reptilia is...
A. monophyletic. B. a supergroup. C. polyphyletic. D. paraphyletic. E. a kingdom.