Which of the following are characteristics of ribozymes? Select one or more that apply

A. cleavage of phosphodiester bonds
B. loss of activity at higher temperatures
C. self-splicing
D. removal of nucleotides from precursor RNAs
E. found in eukaryotes, not bacteria


A, B, C, D

Biology & Microbiology

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The light-independent reactions of plants function to make organic molecules using carbon dioxide as a carbon source. What is the electron source that helps reduce carbon dioxide to sugars and other organic molecules?

A) NADH B) NADPH C) ATP D) electrons from oxygen

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The Karen Ann quinlan case is an example of

a. withholding treatment b. active euthanasia c. withdrawing treatment d. physician-assisted suicide e. b and d.

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Which plant hormone will cause the stomata to close?

a. Ethylene b. Auxins c. Cytokinins d. Abscisic acid e. Gibberellins

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Facilitated transport requires the use of ATP.

a. true b. false

Biology & Microbiology