How can injecting a person with a killed-bacteria vaccine protect that individual from a disease?
A) The proteins of the killed bacteria remain in the body, and live bacteria later prey on them instead of live tissues.
B) The proteins of the killed bacteria bind with receptors in the body so that live bacteria can't bind with them later.
C) The proteins of the killed bacteria stimulate the production of antibodies, which can be utilized later in response to infection.
D) The proteins of the killed bacteria give the person a mild form of the disease, which conditions the body not to respond to later infection.
C
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What is responsible for the high processivity of the Pol III holoenzyme?
A. The dNTP loader complex ensures continuous replication. B. Because it has three polymerase cores, it can replicate three times as much DNA. C. The hand-shaped structure of the polymerase core grasps the template DNA. D. The ? sliding clamp allows Pol III to stay associated with the DNA template as each nucleotide is added. E. The "thumb" structure of the Pol III polymerase core holds the DNA template tightly.
The highest magnification generally used to study
cells is provided by the a. transmission electron microscope. b. compound light microscope. c. phase contrast microscope. d. scanning electron microscope. e. Nomarski process light microscope.
“Tardigrada” means
a. tough exoskeleton. b. many proglottids. c. slow walker. d. short digestive system. e. coelom.
The hardening of the arteries is known as ____
a. arteriosclerosis b. atherosclerosis c. high cholesterol d. a heart attack e. angioplasty