After DNA unwinds and becomes single-stranded in a PCR reaction, the temperature is lowered to allow the ____ to
hybridize with the DNA template.
a. vectors
b. primers
c. tracers
d. restriction enzymes
e. DNA ligase
ANSWER: b
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In common English, "linkage" refers to one event that tends to occur when another does. In genetics, linkage has a precise meaning. It refers to the transmission of
A) two genes that have the same effect. B) two genes on different chromosomes. C) two genes on the same chromosome. D) genotype and phenotype to an offspring.
Genetic recombination is possible because of ________ during or after meiosis.
A. independent assortment B. fertilization with a nonrelated gamete C. crossing over D. All of these are correct.
Shown below is a hypothetical DNA sequence from a virus. Also shown is the sequence of the mRNA that is synthesized from this DNA.DNA sequence:5'-AGCACCTGCCGAATGGGCCAAATCCTGCCGAATAAA-3'3'-TCGTGGACGGCTTACCCGGTTTAGGACGGCTTATTT -5'mRNA sequence (G* = G cap):5'-G*AGCACCUGCCGCCUGCCGAAUAAAAAAA....-3' What is the base sequence of the intron in the template strand of the DNA?
A. 3'-GGACGGCTTATTT-5' B. 3'-GCTTACCCGGTT-5' C. 3'-TTACCCGGTTTA-5' D. 3'-TCGTGGACGGC-5'
Chlorine has an atomic number of 17, and argon has an atomic number of 18. From this information alone, you can predict that:
A) argon has more neutrons than chlorine. B) argon is more chemically reactive than chlorine. C) chlorine has more neutrons than argon. D) chlorine is more chemically reactive than argon. E) argon will more readily ionize than chlorine.