What growth conditions would you use to enrich for ammonia-oxidizing bacteria?
A) aerobic mineral media with ammonia and bicarbonate incubated in the dark
B) anaerobic mineral media with acetate and ammonia incubated in the dark
C) aerobic mineral media with acetate and ammonia, incubated in the dark
D) anaerobic mineral media with ammonia and nitrate incubated in the dark
Answer: A
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If the yellow mottle virus begins its infection of a cell by using its genome as mRNA, which of the following would you expect to be able to measure?
A) replication rate B) transcription rate C) translation rate D) accumulation of new ribosomes E) formation of new transcription factors
To increase the rate of a reaction you could:
A. Add more products. B. Decrease the temperature. C. Add more reactants. D. remove a catlyst
Cell autonomous genes affect only those cells in which they are expressed. Which group of early developmental genes are not cell autonomous?
What will be an ideal response?
By what mechanism might transposons contribute to gene duplication?
a) Transposons may promote unequal crossing over during meiosis. b) Transposon insertion may disrupt an exon. c) Transposons may promote accidents in meiosis, leading to polyploidy. d) Transposons cause failure of chromosomes to segregate during mitosis. e) Transposons may lead to slippage of DNA polymerase during DNA replication.