The function of upstream promoter elements in eukaryotes, such as enhancers and silencers, is to:
a. serve as binding sites for RNA polymerase.
b. regulate the efficiency of transcription initiation.
c. regulate RNA polymerase binding to the TATA box.
d. encode enhancer and silencer proteins.
e. add methyl groups to genes.
b
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What will be an ideal response?
In response to LH and FSH, testes secrete ____
Fill in the blank with the appropriate word.
The duck-billed platypus shares which of the following traits with non-mammalian animals?
a. teeth. b. lack of cloaca. c. laying eggs. d. hair. e. females produce mile.
What happens when plants are illuminated with directional light from the side instead of from directly overhead?
A. Auxin is transported away from the lighted side. B. More auxin is produced. C. Auxin receptors are activated. D. Less auxin is produced. E. Auxin is transported toward the lighted side.