Which of the following is a step in a PCR?
A. DNA is cooled to a temperature at which the hydrogen bonds holding the strands break.
B. The primers anneal to the complementary sequences on the template DNA
C. DNA gyrase enzyme relieves the supercoiling ahead of the replication fork.
D. The DNase I synthesizes a new strand of DNA that is complementary to the template DNA.
B
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In higher animals, including humans, meiosis results in the production of
(a) egg cells (ova). (b) gametes. (c) sperm cells. (d) all of the above.
When a transposable element inserts into a gene, it can (select all correct choices):
A. interfere with transcription. B. cause errors in RNA processing. C. disrupt the open reading frame. D. cause the gene to duplicate itself. E. cause the gene to delete itself.
Which is true of heterotrophs?
A) They capture light energy. B) They cannot be unicellular. C) They store energy in the form of heat. D) They can function as autotrophs in an emergency. E) They can obtain energy from consuming phototrophs.
If two gene loci are on nonhomologous chromosomes, genes at these loci are expected to assort independently
Indicate whether the statement is true or false