The DNA of a cell is analyzed and found to contain 28 percent thymine. What percent of the DNA would by cytosine?
A) 28 percent B) 22 percent C) 25 percent D) 50 percent
Answer: B
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Clonal libraries used to determine the sequence of a microbial genome using the whole-genome shotgun approach are typically generated by
A. cloning large DNA fragments produced by breaking chromosomal DNA with ultrasonic waves. B. cloning large DNA fragments produced by restriction endonuclease cleavage. C. cloning small gene sized DNA fragments produced by breaking chromosomal DNA with ultrasonic waves. D. cloning random PCR fragments amplified from genomic DNA.
____ describe the movement (and rates therein) of carbon between different reservoirs
Fill in the blank with the appropriate word.
The conditions normally present in food such as moisture, acidity and nutrients are referred to as
A. extrinsic factors. B. intrinsic factors. C. endogenous factors. D. exogenous factors
If humans reproduced by parthenogenesis,
a. males would need to produce more sperm. b. the number of males in the population would most likely increase. c. the number of females in the population would most likely increase. d. the children would be identical to their parents. e. there would be no need for mitosis.