Errors made during replication are primarily corrected by (base-excision/mismatch/nucleotide-excision) repair.
Fill in the blank(s) with the appropriate word(s).
mismatch
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A large number of copies of any DNA segment can be obtained by:
a. introducing foreign DNA into a microorganism so that it can be replicated. b. stimulating increased transcription of the appropriate sequence of mRNA. c. stimulating increased translation of the appropriate DNA molecule. d. inducing the production of DNA from proteins. e. stimulating reverse transcription of tRNA.
Which of the following is an adaptation that enhances the uptake of water and minerals by roots?
A) mycorrhizae B) cavitation C) active uptake by vessel elements D) rhythmic contractions by cortical cells E) pumping through plasmodesmata
A child dies following a series of chronic bacterial infections. At the autopsy, the physicians are startled to see that the child's white blood cells are loaded with vacuoles containing intact bacteria. Which of the following explanations could account
for this finding? A) A defect in the Golgi apparatus prevented the cells from processing and excreting the bacteria. B) A defect in the rough endoplasmic reticulum prevented the synthesis of the antibodies (defensive proteins) that would have inactivated the bacteria. C) A defect in the cell walls of the white blood cells permitted bacteria to enter the cells. D) A defect in the lysosomes of the white blood cells prevented the cells from destroying engulfed bacteria.
The genotype of an individual with the dominant phenotype can be determined best by reproduction with
a. a homozygous recessive individual. b. an individual with the dominant phenotype. c. a heterozygote. d. None of these are correct.