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which of the following statements about nuclear transport is true?
a) mRNAs and proteins transit the nucleus through different types of nuclear pores.

b) "Nuclear import receptors bind to proteins in the cytosol and bring the proteins to the nuclear pores, where the proteins are released from the nucleus."

c) "Nuclear pores have water-filled pass through in a nonselective fashion."

d) Nuclear pores are made up of many copies of a single protein.

Answer :

(c)Tiny, water-soluble molecules can nonselectively move through water-filled passageways in nuclear pores.

Does metoprolol function as a nonselective beta blocker?

Abstract.Background:Compared to carvedilol, which is a non-selective beta-blocker with additional alpha(1)-adrenoceptor blockades, metoprolol is a beta(1)-selective beta-adrenergic antagonist.

What type of drug is propranolol?

Since propranolol, timolol, or nadolol have virtually little cardioselectivity, they have a higher risk for bronchoprovocation.

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