A type of horizontal gene transfer in prokaryotes in which a cell receives DNA from another cell through sex pili is:
a. Transformation
b. Replication
c. Transduction
d. Conjugation
e. Fixation
Answer: d. Conjugation
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As DNA polymerase synthesizes a new phosphodiester bond, all the following occur except:
A. amino acid residue extracts H+ from 3' hydroxyl of deoxyribose. B. oxygen of 3' hydroxyl attacks ? phosphoryl group of nucleoside triphosphate. C. phosphate is displaced and protonated by an acidic amino acid residue. D. hydrogen bonds between DNA strands help position nucleotides. E. metal ions lower pKa within the active site to facilitate base catalysis.
This technique has thousands of DNA sequences on a slide and is used to determine which are active at the time
A) microarray B) PCR C) recombinant DNA D) translation
Which of the following is a density-dependent population-controlling factor?
A) tsunami B) influenza outbreak C) volcanic eruption D) earthquake
If you wear gloves and eye protection in the lab, why do you need a lab coat?
A) to protect your eyes from the liquid that could be splashed and to protect your eyes from being rubbed with contaminated gloves B) to protect your clothes from being touched with contaminated gloves and spills C) to protect your hands from being contaminated with ocular fluid