What is active transport?

A) Movement of molecules into or out of a cell down a concentration gradient
B) Rapid movement of molecules in a solution
C) Movement of molecules into or out of a cell against a concentration gradient
D) Movement of molecules into or out of a cell using special proteins and not requiring an expenditure of energy
E) Diffusion of molecules within a cell


C

Biology & Microbiology

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Protists and bacteria are grouped into different domains because _____

A) protists eat bacteria B) bacteria are not made of cells C) protists have a membrane-bounded nucleus, which bacterial cells lack D) bacteria decompose protists E) protists are photosynthetic

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What cavities develop from the ventral cavity?

A. thoracic, abdominal, and pelvic B. cranial and thoracic C. pelvic and abdominal D. cranial and vertebral E. cranial, vertebral, and thoracic

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If a hiker picked up a mollusk on a trail in a rain forest, what class would it belong to?

A. Polyplacophora B. Cephalopoda C. Gastropoda D. Bivalvia

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Translate the correct answer from the above question into tRNA.

A. CCA - TAT - TCG B. CCA - UAU - UCG C. GGU - AUA - AGC D. GGT - ATA - AGC

Biology & Microbiology