Before a cell divides, its DNA must be replicated to
A) provide a backup copy of DNA in case the original DNA is damaged during mitosis.
B) replace the DNA lost during transcription.
C) supply each new cell with a full set of the genetic material.
D) replace genetic instructions used by the original cell.
E) use as an energy source during cytokinesis.
C
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Which layer of the diagram identifies the area where a hypodermic needle would be placed for an injection of a drug?
A) A
B) B
C) C
D) N
E) K
What is the function of antidiuretic hormone (ADH)?
A. Causes large urine volume B. Stimulates loss of water by the kidneys C. Stimulates retention of water by the kidneys D. Causes a darkening of the skin
The function of the protein, dystrophin, is to:
a. Anchor actin filaments to the plasma membrane b. Conduct an action potential to the sarcoplasmic reticulum c. Form regular arrays of actin filaments within the I-band d. Regulate the binding of myosin to actin e. Transport calcium into t-tubules
In transamination, the amino group of an amino acid is
A) converted to ammonia. B) converted to urea. C) transferred to a keto acid. D) absorbed by water. E) transferred to acetyl-CoA.