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.
Answer: C
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In the Watson–Crick model of DNA structure, the polynucleotide chains ____
a. are of unequal length b. are arranged with the bases forming the backbone of the helix c. form covalent bonds between uracil and adenine d. are oriented in the same direction e. are oriented in opposite directions
Under which conditions are the processes of weathering, leaching, and input of organic material from plants into soil maximized?
A) warm temperatures and abundant water B) cool temperatures and abundant water C) cool temperatures and scarce water D) warm temperatures and scarce water
A biological species is defined as a population whose members can interbreed, although the offspring may be infertile.
a. true b. false
How would two unrelated individuals with the same color skin compare?
A) They would have similar alleles for melanin production. B) They would have similar alleles for repetitive DNA segments. C) They would have similar alleles for nose shape. D) They would be no more likely to have similar alleles for any gene than any two random individuals.