Which of the following is not true of viruses?
A. Viruses replicate by binary fission.
B. Viruses consist of one or more molecules of DNA or RNA enclosed in a coat of protein and sometimes in other more complex layers.
C. Viruses can exist in two phases: intracellular and extracellular.
D. Viruses are acellular.
Answer: A
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Membrane potential will affect the directional movement of
A. Glucose (C6H12O6) B. Cholesterol C. Potassium (K+) D. Oxygen (O2)
Which of the following molecules are biologically active?
A. L – sugars B. L – amino acids C. only amino acids that are optically inactive D. only sugars that lack chiral centers E. All of these molecules are biologically active.
Metaphase II arrest is mediated by ________, a biochemical activity present in mature eggs.
Fill in the blank(s) with the appropriate word(s).
Diana has been fasting for a few days and decides to go for a short run before breaking her fast. The glucose she needs for her run will come from________.
A. cellular respiration B. insulin C. glycolysis D. breaking glycogen down to small molecules E. breaking starch down to small molecules