Which of the following is NOT a common step in creating a genomic library?
A) Fragment DNA into small segments.
B) Hybridize DNA sequences to form inserts of a target size range.
C) Ligate DNA into vectors.
D) Transform the vectors into a host.
Answer: B
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The taxonomy of the methanogens is based on
A) phenotypic analysis. B) phylogenetic (comparative nucleic acid sequencing) analysis. C) phenotypic and phylogenetic analyses. D) neither phenotypic nor phylogenetic analysis.
Which of the following organelles is not generally found in animal cells?
A) food vacuole B) centriole C) endoplasmic reticulum D) central vacuole E) mitochondrion
Phytoestrogens in plants ____
a. increase the production of megaspores b. function in the production of eggs c. increase the speed at which pollen tubes reach the egg d. aid in the nuclear fusion of egg and sperm e. have nothing to do with plant reproduction
When calcium levels rise, the ____ secrete(s)
____, which ____ osteoclast activity. a. parathyroids; calcitonin; suppresses b. thyroid; calcitonin; suppresses c. thyroid; calcitonin; enhances d. thyroid; PTH; suppresses e. parathyroids; PTH; enhances