Which of the following statements about DNA is FALSE?
A. A eukaryotic genome is made up of many DNA molecules.
B. A strand of DNA is made up of many nucleotides.
C. One chromosome is made up of many DNA molecules.
D. A DNA double helix contains both covalent bonds and hydrogen bonds.
E. All of these are TRUE.
Answer: C
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Which of the following fluid compartments is not a partner in immune function?
A. Intracellular fluid B. Extracellular fluid C. Lymphatic system D. Blood stream
The ultimate source of energy for almost all living organisms is:
a. heat. b. glucose. c. carbohydrates. d. lipids. e. the sun.
Thymine is used in DNA despite the fact that it is energetically more expensive to synthesize than uracil because
A) spontaneous deamination reactions convert cytosine to uracil at a fairly high rate. B) uracil is more sensitive to ultraviolet (UV) damage. C) uracil is more susceptible to depurination. D) uracil can only bind with ribose, not deoxyribose. E) thymine is less likely to undergo spontaneous deamination than uracil.
Metabolic channeling involves the localization of ________ in different parts of a cell in order to influence the activity of metabolic pathways.
A. inhibitors B. repressors C. substrates and enzymes D. activators