An enzyme that cleaves internal phosphodiester bonds of a DNA molecule is a (n)

A. ligase.
B. exonuclease.
C. methylase.
D. endonuclease.


Answer: D

Biology & Microbiology

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Eukaryotic and archaeal cells are able to regulate cellular processes at which of the following levels?

A. Mutational B. Translational C. Transcriptional D. Physiological E. Posttranscriptional

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Digestion of starches begins in the:a

mouth. b. stomach. c. duodenum. d. jejunum. e. large intestine

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Which of these biological molecules contain genetic information?

A) Nucleic acids B) Carbohydrates C) Proteins D) Lipids

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Which of the following statements regarding the function of mitosis is false?

A) Mitosis allows organisms to grow. B) Mitosis promotes genetic diversity. C) Mitosis is necessary for asexual reproduction in eukaryotes. D) Mitosis promotes repair tissues.

Biology & Microbiology