Using radioactive tracers to determine the interactions of bacteriophages and their host bacteria, Hershey and Chase demonstrated without question that
A.) genes are composed of protein molecules.
B.) DNA and proteins are actually the same molecules located in different parts of cells.
C.) bacteria inject their DNA into the cytoplasm of bacteriophages.
D.) DNA is the molecule that stores genetic information in cells.
Ans: D.) DNA is the molecule that stores genetic information in cells.
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Kelps require ____ substrates in order to grow
a. rocky b. muddy c. silty d. sandy e. porous
Which of the following neurotransmitters is mismatched?
a. acetylcholine : muscle contraction b. endorphins : pain relief c. norepinephrine : response to stress d. serotonin : sexual function e. dopamine : reward -based learning
The multiple stomach chambers of cattle and other
__________ allow them to maximize the nutrients they get from plant food. Fill in the blank(s) with the appropriate word(s).
Choose the pencil that has the lowest potential energy
A) A pencil on your desk B) A pencil falling from your desk C) A pencil hitting the ground after falling from your desk D) A pencil laying on the ground