Which of the following is the homeostatic
control for respiration?
a. carbon dioxide concentrations
b. oxygen concentrations
c. ATP concentrations
d. activity rates
e. more than one of these is the homeostatic
control for respiration
A
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Anaphylaxis is the name given to allergic reactions caused by IgE-mediated release of mast cell granules
Indicate whether this statement is true or false.
Many animals share homologues of the gene PAX6, which is important in the development of ________
a. legs b. eyes c. segmentation d. wings
The genetic code
A) contains sense codons and nonsense codons. B) uses a quartet code to encode the codons. C) relies on codons made up of DNA. D) has 60 codons. E) encodes for 18 amino acids.
Which one of the following is the main reason that a typical eukaryotic gene is able to respond to a far greater variety of regulatory signals than a typical prokaryotic gene or operon?
(a) Eukaryotes have three types of RNA polymerase. (b) Eukaryotic RNA polymerases require general transcription factors. (c) The transcription of a eukaryotic gene can be influenced by proteins that bind far from the promoter. (d) Prokaryotic genes are packaged into nucleosomes.