A replication fork is:
a. observed only in prokaryotic chromosomes.
b. observed only in nondividing cells..
c. a Y-shaped structure where parental DNA strands are separated by helicase.
d. a site where one DNA strand serves as a template, but the other strand is not replicated.
e. created by the action of the enzyme RNA polymerase
c
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Which of the following function: location relationship is INCORRECT?
A. acetyl CoA formation; cytosol B. citric acid cycle; mitochondria matrix C. oxidative phosphorylation; mitochondria inner membrane D. glycolysis; cytosol E. electron transport chain and ATP synthase; mitochondria inner membrane
Where do axons of olfactory receptors synapse with interneurons?
a. olfactory bulb b. ganglia c. spinal cord d. nasal cavity e. peripheral nerve
The advantage of having memory cells in specific defenses is that
A) they remain in an active state, continuously producing antibodies. B) if exposed to an antigen a second time, they quickly become plasma cells. C) they prevent production of other proteins so that antibodies can be produced. D) they produce antibodies and can become phagocytic. E) they prevent viruses from entering the body a second time.
Describe the mechanism by which PrP is infectious
What will be an ideal response?