Human diploid cells have how many chromosomes?
a. 12
b. 23
c. 46
d. 69
e. 92
ANSWER: c
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Enzymes decrease the overall free energy change in a chemical reaction.
Answer the following statement true (T) or false (F)
A modification that occurs to a nuclear gene that alters gene expression without modifying the DNA sequence is called _______ inheritance
A. extranuclear B. cytoplasmic C. maternal effect D. epigenetic E. nuclear
Which of the following is NOT true about the tempo of evolution?
a) Evolution always occurs gradually, with small changes over long periods of time. b) Rapid evolutionary changes by punctuated equilibrium proceed by a process different from natural selection. c) Scientific evidence now shows that gradualism, as proposed by Darwin, is wrong. d) Gaps in the fossil record mean that some creatures went extinct and then made a comeback. e) None of the above is true concerning the current view of the tempo of evolution.
Which of the following is not found in the plasma membrane:
A. lipids B. DNA C. carbohydrates D. cholesterol E. proteins