Which of the following proteins is found only in the RNA polymerase holoenzyme?

A) Alpha
B) Beta
C) Epsilon
D) Sigma
E) Rho


D

Biology & Microbiology

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What is the role a species plays in an ecosystem?

A) ecological niche B) trophic level C) biophilia D) biomass

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Osmosis refers to the diffusion of ________ across a membrane

Fill in the blank(s) with correct word

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Which of the following is not a type of temperate grassland?

A) veld B) pampas C) prairie D) chaparral

Biology & Microbiology

Which of the following enzymes would you expect to find in the virion of a retrovirus, but NOT in a bacteriophage?

A) lysozyme B) methylase C) restriction enzymes D) reverse transcriptase

Biology & Microbiology