The only gene that has been positively identified with the onset of Alzheimer disease encodes a protein that _____
a. is involved in cholesterol metabolism
b. breaks down neurotransmitters
c. maintains the health of striatum cells
d. attaches amino acids to tRNA molecules
e. breaks down fatty deposits around neurons
a
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Why would a female song bird choose to mate with a male that has a large song repertoire? Because
A. females tend to select traits that are well developed to judge fitness of a male. B. females judge by feather color and voice of the male. C. a long song allows the female to study the male for any physical defects before mating. D. immature males have a long varied song where older, less fit males will have a short song. E. females only judge fitness by physical appearance, not song repertoire.
In the absence of a repressor, where will RNA polymerase bind to a prokaryotic operon to initiate transcription?
a. transcriptional start site b. operator c. promoter d. coding region
Which is not true about the value of 3-D printing in regenerating organs?
A) It is used to create the scaffolding to hold the tissue. B) It is used to apply the cells to the scaffolding. C) It is used to create complicated organs. D) All of these are true.
All of the following statements about fungi are true except
a. All fungi are unicellular b. All fungi have eukaryotic cells c. Fungi are heterotrophic d. Many fungi can decompose plant material