A primary function of the nucleus in eukaryotic cells:

A) to transport proteins outside of the cell
B) to synthesize proteins from mRNA
C) to produce ATP that powers the cell
D) to contain the cells hereditary material
E) none of these


Ans: D) to contain the cells hereditary material

Biology & Microbiology

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The perception of a certain pitch of sound depends partly on

A. which bones of the middle ear are moved. B. the amplitude of the sound waves. C. whether it is the round window or oval window that vibrates. D. which hair cells of the cochlea are stimulated. E. where particles settle in the semicircular canals.

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Viral genomes are always linear, double-stranded DNA

Indicate whether the statement is true or false

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As urine moves through a nephron, it is modified by ions, water, and other materials either being secreted into the fluid or by efflux of substances out of the urine

However, such modifications do not occur in which one of the following regions of the nephron? A) loop of Henle B) collecting duct C) Bowman's capsule D) proximal tubule E) distal tubule

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What are similar cells that are grouped together and perform a common function called?

A) tissues B) organs C) organ systems D) accessory organs

Biology & Microbiology