Amino acids are transferred to the ribosome to be incorporated into a growing polypeptide chain by
A) aRNA.
B) mRNA.
C) rRNA.
D) tRNA.
E) pRNA.
D
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Vision impairment as a result of old age and the loss of elasticity in the lens is called ________
A) Diplopia B) Myopia C) Astigmatism D) Presbyopia
According to the sliding filament mechanism of muscle contraction, the muscle fibers of one motor unit slide in closer together between the muscle fibers of adjacent motor units
Indicate whether the statement is true or false
Lack of intrinsic factor leads to
A. pernicious anemia. B. gall stones. C. gastric ulcers. D. heartburn. E. None apply.
The general senses
A) involve receptors that are relatively simple in structure. B) are located in specialized structures called sense organs. C) are localized to specific areas of the body. D) cannot generate action potentials. E) are limited to the skin.