Biology

Biology, 08.10.2019 08:10, andreastyles1603

Passive transport is characterized bya. the expenditure of atpb. no use of energyc. movement of molecules from a low concentration to a high concentrationd. movement of molecules from a high concentration to a low concentratione. a and cf. b and d

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Biology, 05.07.2019 21:00, StupidFatChipmunk

There are two main ways in which molecules are transported into and out of cells - active transport and passive transport. which of the following statements is true of passive transport? a. molecules move up a concentration gradient during passive transport. b. endocytosis and exocytosis are two forms of passive transport. c. carrier proteins are sometimes used during passive transport. d. energy, in the form of atp, is essential for passive transport.

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Biology, 01.10.2019 06:50, jayqq4240

Two types of transport of molecules across a cell membrane are: transport 1: solute molecules move across the cell membrane along their concentration gradient; requires no energy expenditure. transport 2: solute molecules move across the cell membrane against their concentration gradient; requires expenditure of energy. which statement is correct? a) transport 1 describes passive transport by diffusion. b) transport 2 describes passive transport by the na+/k+ pump. c) transport 2 describes passive transport by a carrier protein. d) transport 1 describes facilitated transport of substances through the membrane.

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Biology, 08.10.2019 08:30, elizabethprasad2

Which of the following statements is correct about diffusion? a) it may require a transport protein. b) it is a passive process in which molecules move from a region of higher concentration to a region of lower concentration. c) it requires an expenditure of energy by the cell. d) it involves movement of molecules down a concentration gradient and may require a transport protein. e) it is an active process in which molecules move from a region of lower concentration to one of higher concentration.

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Chemistry, 12.10.2019 04:30, waves2114

Which of the following statements about passive transport is correct? a. passive transport permits the solute to move in either direction, but the net movement of the population of solute molecules occurs down the concentration gradient of the molecule. b. passive transport operates independently of diffusion. c. in passive transport, solute movement stops when the solute concentration is the same on both sides of the membrane.

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