Some animal viruses may enter a ____ stage in which the virus remains in the cell in inactive form
a. latent
b. virulent
c. temperate
d. transformation
e. lytic
ANSWER: a
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Genes that affect the __________ system often affect behavior. Fill in the blank(s) with the appropriate word(s)
Aging may be attributed to
a. genetics. b. free radical damage. c. a decline in DNA repair mechanisms. d. changes in structural proteins. e. all of these.
A scientist studied DNA replication in a test tube. He added single-stranded DNA template strands, DNA polymerase, and radioactively-labeled nucleotides. After replication occurred, he tested the DNA to find out which strands now contained radioactive nucleotides. What is the best prediction of his results?
A) Only the template strands will contain radioactive nucleotides. B) Only the newly-synthesized strands will contain radioactive nucleotides. C) Both the template strands and the newly-synthesized strands will contain radioactive nucleotides. D) Neither the template strands nor the newly-synthesized strands will contain radioactive nucleotides
Scientists studying human behavior observe brain activity in an MRI for many patients. They show photos of babies to adults and look at which part of the brain lights up. They conclude that the part that lights up is in control of that response.
What will be an ideal response?