If 16% of the nucleotides in one strand of a DNA molecule contain the base G, what percent of the nucleotides on the complementary strand will also contain the base G?
A. 8%
B. 34%
C. 16%
D. 32%
E. It is impossible to determine from the information given.
Answer: E
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Which of the following matings would have the highest frequency of chromosomal gene transfer?
A. F+ x F- B. F' x F- C. Hfr x F-
The theory of spontaneous generation (living organisms evolves from nonliving organisms) was advocated and defended by:
A. John Needham B. Francesco Redi C. Lazzaro Spallanzani D. Girolamo Fracastoro E. Louis Pasteur
Although there are many distinct prokaryotic species, most have a small range of shapes, sizes, and growth rates. Which of the following characteristics are not observed in prokaryotes?
(a) a highly structured cytoplasm (b) endoplasmic reticulum (c) the ability to divide rapidly (d) a cell wall
Which of the following statements about mobile genetic elements is true?
(a) Mobile genetic elements can sometimes rearrange the DNA sequences of the genome in which they are embedded by accidentally excising neighboring chromosomal regions and reinserting these sequences into different places within the genome. (b) DNA-only transposons do not code for proteins but instead rely on transposases found in cells that are infected by viruses. (c) The two major families of transposable sequences found in the human genome are DNA-only transposons that move by replicative transposition. (d) During cut-and-paste transposition, the donor DNA will no longer have the mobile genetic element embedded in its sequence when transposition is complete.