Messenger RNA editing is an example of gene expression at the _________ level.

a) preternatural
b) post-translational
c) post-transcriptional
d) translational
e) transcriptional


Ans: e) transcriptional

Biology & Microbiology

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All of the following describe characteristics of sclerenchyma cells, except which? 

A. Their function is primarily to transport oxygen and carbon dioxide throughout the leaf. B. They have thick, tough secondary walls. C. Their secondary walls may be impregnated with lignin. D. They form fibers and sclereids. E. They lack living protoplasts when mature.

Biology & Microbiology

Which of the following is an abiotic factor?

a. symbiotic relationships b. prey populations c. annual precipitation d. parasites

Biology & Microbiology

The protein coat of a virus is also referred to as its:

a. cell wall. b. capsomer. c. armor. d. capsid. e. antigen.

Biology & Microbiology

Which of the major macromolecules—lipids, carbohydrates, proteins, and nucleic acids—contain nitrogen atoms (N)?

A. Lipids and nucleic acids B. Carbohydrates and proteins C. Carbohydrates and lipids D. Nucleic acids and proteins

Biology & Microbiology