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.
A. sarcoplasmic reticulum.
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The two types of transposable elements are DNA transposable elements (DNA TEs) and long terminal repeats (LTRs)
A. true B. false
Although birds, fish, mammals, reptiles and amphibians are different, evidence of their evolutionary
links is provided by a. chemical analysis. b. comparison of adult body forms. c. comparison of ways in which their embryos develop. d. time of gestation. e. comparing life expectancies.
If a DNA sequence on one strand is ATCGATG, what is the corresponding sequence on the other strand?
a. TAGCTAC b. UAGCUAC c. TUGCUTC d. ATCGATG e. TTACGTC
Urey and Miller's experimental setup was able to produce all twenty of the amino acids found in proteins. Some amino acids contain the element oxygen. What starting material in the Urey-Miller experiment was source of this element?
a) methane b) ammonia c) hydrogen gas d) water e) electrical sparks