What makes RNA a unique nucleic acid?
A) RNA is composed of two strands held together by hydrogen bonds.
B) RNA contains a nitrogenous base known as uracil.
C) RNA is built from building blocks known as a nucleotide.
D) RNA contains a sugar known as deoxyribose.
Answer: B
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A)Receptor-mediated endocytosis B)Osmosis C)Active transport mechanisms D)Carrier-mediated facilitated diffusion E)Phagocytosis
Why is muscle tone the most important stabilizing factor for most joints?
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The difference between the maximum arterial pressure and the minimum arterial pressure is called the
A. mean arterial pressure. B. diastolic pressure. C. pulse pressure. D. cardiac pressure. E. systolic pressure.
Which is the last stage in pre-embryonic development?
A. Morula B. Blastocyst C. Fertilization D. Cleavage