How can microarrays help us understand cellular functions?
a. Microarrays let us study different cellular structures under different conditions.
b. Microarrays let us directly measure protein expression in individual cells.
c. Microarrayslet us identify which portions of a genome were being expressed in a cell at a particular time.
d. Microarrays let us identify which DNA sequences are present in a particular cell type under certain conditions.
e. Microarrays let us identify which portions of a genome serve as regulatory sequences.
ANSWER: c
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What might happen over time if two bird species competed for the same seed resource and one preferred larger seeds while the other species preferred smaller ones?
A) Species would repeatedly switch between small and large seeds. B) Beak sizes might shift over time. C) Both species would die out via competition. D) Seed size will shift larger over time.
N-Ras, K-Ras, and H-Ras are best described as
a) Three unrelated oncogenes that each cause sarcomas b) Three different cancer-causing mutations found in the same ras gene c) Different activation states of the Ras protein d) Three closely related genes that likely evolved from a single ras gene
Your younger brother has cut himself with a rusty knife he found in the garden. The wound is not life threatening, but it is deep enough that it makes you concerned. You would ________
A) take him to an ER B) make an appointment with his primary health care provider C) take him to a DO D) make an appointment with his physician
The type of exercise that creates new blood vessels and makes the heart pump more efficiently is ________
Fill in the blank(s) with correct word