Glucose moves through a protein transporter down its concentration gradient into the cell. This is an example of ____
a. diffusion
b. endocytosis
c. exocytosis
d. osmosis
e. facilitated diffusion
ANSWER: e
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Clonal selection is the idea that:
A. sequence information from the antigen is copied into the DNA of a B cell. B. genomic rearrangement responds to the presence of antigen to produce the correct antibody. C. the ability of an antibody to bind antigen results in mitotic cell division. D. Two answer options are correct: genomic rearrangement responds to the presence of antigen to produce the correct antibody AND the ability of an antibody to bind antigen results in mitotic cell division.
Placoid scales are found on:
a. lungfish. b. sharks. c. ray-finned fish. d. lob-finned. e. snakes.
With regards to prokaryotes and eukaryotes, all of the following are true, EXCEPT
What will be an ideal response?
The basic categories of hormones are peptide or proteins, steroids, and aminoacid derivatives. The chemical properties of each hormone type determine someof its functional properties and how it must interact with receptors to signal to the cell.A new hormone is discovered. Tests reveal that it is small, hydrophilic, and degraded by a protease. What type of hormone is it?
A. Amino acid derivative B. Steroid C. Peptide D. Prostaglandin E. Glucocorticoid