Pol III holoenzyme of E. coli is composed of:
A. three Pol III cores, two ? clamps, two clamp loaders.
B. two Pol III cores, two ? clamps, and one clamp loader.
C. two Pol III cores, two ? clamps, and two clamp loaders.
D. three Pol III cores, two ? clamps, one clamp loader.
E. three Pol III cores, three ? clamps, one clamp loader.
D
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An individual that is homozygous for an allele will produce two bands on an electrophoresis gel. (A homozygous individual only produces one kind of protein for a trait so will only produce one band on a gel electrophoresis.)
A. true B. false
The first step of the scientific method is to
a. ask a question. b. construct a hypothesis. c. observe carefully. d. formulate a prediction.
A(n) ________ protects the internal organs of ray-finned fishes
A) exoskeleton made of cartilage B) notochord C) internal bony skeleton D) exoskeleton made of chitin E) internal cartilage skeleton
Photosynthesizers take in carbon dioxide, whereas decomposers ________ carbon dioxide
A) yield up B) take in C) fix D) destroy