Which letter in the figure above corresponds to closed sodium and potassium channels?
A) A
B) B
C) C
D) D
E) E
Answer: A
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In animal eggs, once fertilization occurs, ________ are the second messengers that trigger egg activation.
Fill in the blank(s) with the appropriate word(s).
Plant roots that are in a horizontal position grow down because
A. Cells on the upper side elongate more than those on the lower side. B. Auxins are stimulating cells on the lower side to elongate more. C. Auxins are being pulled to the upper side. D. Auxins are having no influence on this process. E. Statoliths are pushing auxins to the upper side.
What are the odds that a 35 year old woman will give birth to a child with a chromosomal abnormality?
a. 1/1,000 b. 1/80 c. 1/50 d. 1/500 e. 1/20
Which of the following represents the correct sequence of events for translation in eukaryotes?
a. eIF-2 binds to GTP, the ribosome scans mRNA for AUG, GTP is hydrolyzed b. the ribosome scans mRNA for AUG, eIF-2 binds to GTP, GTP is hydrolyzed c. GTP is hydrolyzed, eIF-2 binds to GTP, the ribosome scans mRNA for AUG d. eIF-2 binds to GTP, GTP is hydrolyzed, the ribosome scans mRNA for AUG