Which set of substances requires either channel or transport proteins in order to cross the cell membrane? O A. H20, NaCl, C,H1206 O B. N2, H20, NH3 O C. NaCI, NH2CONH2, 02 O D. N2, H20, C6H1206 SUBMIT
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- Proteins like albumin in the blood maintain water inside the blood vessels using A. Osmotic pressure B. Active diffusion C. Active transport D. DiffusionWhich one of the following structures between two adjacent cells is an effective transport pathway? A Plasmalemma B Plasmodesmata C Plastoquinones D Endoplasmic reticulumHow can substances be transported across a membrane against their concentration gradient? A. If the plasma membrane is fully hydrophobic. B. The plasma membrane is permeable to all small molecules. C. Some membrane proteins act as channels for specific molecules to enter the cell. D. Some membrane proteins are ATP-dependent carrier molecules.
- The cytoplasmic connections from cell to cell are known as: A middle lamella B plasmodesmata C cell membrane system D endoplasmic reticulumHigh Surface area to volume ratio allows cells to do what quickly? a) Move materials around inside the cell b) Move materials in and out of the cell c)Communicate to other cells d) DividePlant cells use their ________ to regulate water concentration. a. central vacuole b. water sac c. cell wall
- What kind of membrane proteins trigger a change in cellular activity in response to a stimulus? A. Receptor proteins B. Enzymes C. Adhesion proteins D. Transport proteinsCompared with a smaller cell, a larger cell of the sameshape has(A) less surface area.(B) less surface area per unit of volume.(C) the same surface-area-to-volume ratio.(D) a smaller cytoplasm-to-nucleus ratioWhat controls the direction of movement of ions across the membrane? A. Peripheral proteins B. Channel proteins C. Plasmodesmata D. Carrier proteins
- a) Difference between Endocytosis and exocytosis b) Difference between DNA vs RNA vs Protein c) Difference between PCR vs DNA replication d) Difference between Sympathetic vs Para-sympathetic nervous systemThe diffusion of water across a selectively permeable membrane is called? A. Active transport B. Facilitated diffusion C. Osmosis D. Cell membraneActive transport of a substance across a membrane requiresa. a gradient b. the expenditure of ATP c. water d. diffusion