What is the role of DNA helicase during the S phase of interphase?
A) DNA helicase unwinds the two strands of DNA.
B) DNA helicase removes the RNA primer and replaces it with DNA.
C) DNA helicase catalyzes the addition of nucleotides to the new DNA strands.
D) DNA helicase builds RNA primers on the existing DNA strands.
Answer: A
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The filtration membrane consists of the
A. podocytes, basement membrane, and macula densa. B. capillary epithelium, podocytes, and macula densa. C. podocytes, capillary endothelium, and basement membrane. D. parietal layer and visceral layer. E. basement membrane, capillary epithelium, and macula densa.
Which of the following is the last step in the sequence of events happening when cyclic AMP acts as a second messenger?
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cAMP acts with the target cell's DNA to carry out the chemical messenger's action
Indicate whether the statement is true or false