Transcription in eukaryotes requires which of the following in addition to RNA polymerase?

A) start and stop codons
B) ribosomes and tRNA
C) several transcription factors
D) aminoacyl-tRNA synthetase


C

Biology & Microbiology

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The biologically available carbon that is produced within large, lentic rivers and lakes is called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Molecular motors working with microtubules:

a. Are calcium-dependent ATPases b. Use microtubule singlets and doublets c. Use microtubule singlets and triplets d. Two of the above e. None of the above

Biology & Microbiology

The invasion of the land by amphibians posed a number of challenges requiring evolutionary innovations. Which one of the following does NOT match a challenge with a corresponding adaptation found in amphibians?

A. The force of gravity was greater without water's buoying effect, selecting for well-muscled legs. B. Eggs dry out in a terrestrial environment, selecting for the amniotic egg. C. Additional oxygen was needed for larger muscles, selecting for the partially-divided heart and pulmonary circuit. D. Gills tend to collapse out of the water, selecting for lungs and cutaneous respiration.

Biology & Microbiology

Ethylene oxide is

A. a halogen. B. sporicidal. C. used as an antiseptic against anaerobes. D. the active agent in household bleach. E. only effective with high heat.

Biology & Microbiology