Which type of white blood cells produces defensive proteins called antibodies?
A. Natural killer cells
B. B cells
C. Phagocytic cells
D. T cells
Answer: B
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Match each of the proteins involved in DNA replication with its function
a. DNA helicase b. Topoisomerase II c. Single-stranded binding proteins d. DNA polymerase _____ Attaches DNA nucleotides to an RNA primer _____ Unwinds the DNA duplex _____ Relieves the stress on the replication fork caused by unwinding _____ Proofreads the growing DNA strands and replaces mismatched nucleotides _____ Prevents strands of DNA from rejoining after being unwound What will be an ideal response?
The intensity of an electrical impulse is reflected in the
a. frequency of action potentials. b. magnitude of action potentials. c. duration of action potentials. d. intensity of action potentials. e. the frequency and duration of action potentials.
Of the following list, which antibiotics affect protein synthesis?
A. Penicillin B. Ciprofloxacin C. Chloramphenicol D. Tetracycline E. Both tetracycline and chloramphenicol are correct.
The primary photosynthetic pigment molecule, chlorophyll a, is an orange pigment.
a. true b. false