In order for a G protein to be active:
A. the alpha subunit must bind GTP.
B. the beta and gamma subunits must
separate from the alpha subunit.
C. both the beta and gamma subunits must
bind GTP.
D. the alpha subunit must bind GTP and the
beta and gamma subunits must separate
from the alpha subunit.
D
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In an F+ × F- conjugation, the donor is the ________ strain.
A. F- B. F+ C. both F+ and F- (It is a reciprocal exchange) D. neither F+ nor F- (There is no exchange)
The primary reservoir for calcium that is released during excitation-contraction coupling in a skeletal muscle fiber is the
A. sarcoplasmic reticulum. B. endoplasmic reticulum. C. transverse tubules. D. Golgi bodies. E. troponin.
Genes that have been altered and may cause cancer are called
1.proto-oncogenes. 2.oncogenes. 3.totipotent genes. 4.controlled genes. 5.constitutive genes.
Woolly Spider Monkeys are Old World Monkeys found in Africa that exhibit ancestral features.
Indicate whether the statement is true or false.