What is the average number of replication forks per DNA replication cluster in a mammalian cell nucleus?

a. 8000
b. 4000
c. 200
d. 40


Ans: d. 40

Biology & Microbiology

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The process of post-transcriptional gene silencing triggered by micro-RNA molecules that stop translation is called ____

a. RNA interference b. micro-interference c. translational interference d. transcriptional disruption e. disruptive genetic silencing

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Factors that can alter the level of expression of a gene include

_____ an increase in environmental temperature. _____ an increase in salinity. _____ exposure to UV radiation. _____ presence of a particular energy substrate.

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Detection and response to environmental cues or stimuli are primarily functions of

a. metabolism. b. the nervous system. c. catabolism. d. the endocrine system. e. thermodynamics.

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Which of the following is believed to have given rise to eukaryotes?

A. Ectosymbiosis B. Endosymbiosis C. Episymbiosis D. Ectendosymbiosis

Biology & Microbiology