The three parts making up a nucleotide are
A. a purine, a pyrimidine, and a ribose sugar.
?B. a five-carbon sugar, a phosphate group, and a nitrogenous base.
?C. an adenine, a guanine, and a cytosine.?
D. a double helix, a single strand, and a chromosome.?
E. a phosphorous, a deoxygenated ribose, and an amino acid.
B
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A dancer performs a pirouette in which plane?
A. sagittal B. frontal C. transverse D. longitudinal
The thick and thin filaments are made up of ________, respectively
A) the dark and light bands B) the H zone and the Z disc C) T tubules and terminal cisterns D) myosin and actin
Briefly discuss the role of the myosin heads in the sliding filament mechanism of muscle contraction
What will be an ideal response?
Excess interstitial fluid is collected and returned to the blood by the ________.
A. venules B. capillaries C. lymph nodes D. lymphoid system