Which of the following is noted when comparing DNA and RNA?
A) Adenine pairs with different bases in DNA and RNA.
B) Thymine pairs with different bases in DNA and RNA.
C) No sugar is present in either molecule.
D) Hydrogen bonding is important only in DNA.
E) Only DNA has a backbone made up of sugars and phosphates.
A
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The term "junk DNA" is no longer used because these regions of DNA have been found to be associated with all of the following except
A) miRNAs. B) speciation. C) binding sites for regulatory regions. D) All of the above have been associated with "junk DNA." E) None of the above have been associated with "junk DNA."
In Pavlov's dog experiment, what were the original and conditioned stimuli?
A. original stimulus: food, conditioned stimulus: metronome B. original stimulus: saliva, conditioned stimulus: food C. original stimulus: metronome, conditioned stimulus: experimenter D. original stimulus: experimenter, conditioned stimulus: saliva E. original stimulus: metronome, conditioned stimulus: saliva
Why are roots essential for terrestrial plants?
A. They allow plants to obtain sun energy. B. Roots are not essential for plants, as plants can function without roots. C. They absorb carbon dioxide needed for photosynthesis. D. They absorb water and minerals needed for growth.
Some of the structural components of Staphylococcus act as virulence factors. Which of the following components inhibits chemotaxis and phagocytosis, inhibits proliferation of mononuclear cells?
A. Capsule B. Peptidoglycan C. Protein A D. Teichoic acid E. Slime layer