Which type of RNA is translated within a cell?
A) tRNA
B) mRNA
C) rRNA
D) siRNA
E) all of the above
B
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In a molecule of methane, CH4, each hydrogen atom shares an orbital with the carbon atom. The total number of
shared electrons in CH4 is ____.
a. 1 b. 2 c. 4 d. 5 e. 8
A rising antibody titer a few days apart indicates
A.) the patient had a past case of the disease. B.) the patient has a current infection. C.) nothing, people always have antibodies in their serum. D.) All of these choices are correct.
The humerus fits into what at the shoulder?
A. clavicle B. acetabulum C. acromion process D. olecranon process E. glenoid cavity
Gehring tested the hypothesis that the Pax6 gene acts as a master regulator of eye development by engineering Drosophila Pax6 genes to be expressed in Drosophila antennae. What happened, and did it support or refute his hypothesis?
A. A compound eye developed on the antenna; this supports the hypothesis. B. A compound eye developed on the head; this supports the hypothesis. C. The antenna developed normally; this falsified the hypothesis. D. The antenna developed where the eye normally would be; this supports the hypothesis. E. The antenna developed where the eye would normally be; this falsified the hypothesis.