16 s) Cell wa bi Cell membrane c) Lysnome (di Vacaniae 7 Which sype of slution w

Question

16 s) Cell wa bi Cell membrane c) Lysnome (di Vacaniae 7 Which sype of slution will cause celis to swell or even to bunst (a) Ishonic solution b) Hypotonic selution ic) Hypertionic solution (4) Oumotic solution 18 Oligoaccharides are long cais of lis nked to pot and phospheolipids on the surface of cells (a) Tur (hi False 9 Which one of the follerwing can causc the interor of the seuron to have a momentary positive chargs (a) Opening of potssim leak channels (b) Activity of the Na K ATP (c) Opening of voltage gated sodium channcls 4) Opening of soltage gated potassim chanmcs 20 is a protein that contributes to the asymmctric arrangement of the phospholipid bilayer (a) Flippas (hi Spectrin (c) Scamblases (d) transferasc 21. Glycolipids ave only found in the sytoplasmic part of the plasma membran (a) True (bj False is a membrane protcin the lie entirely outside on either side of the bilayer and it is covalently attached to lipid molecules within the membrane (a) Protein attachod b) Tranimembrane protein (c) Lipid-linked (d) monolayer associated ? helix 23. Which statement best describes the plasma membrane (a) It is freely permeable to all substances (b) It is sclectively permeable to certain substances (c) It is nonpermeable to all substances (d) More than 1 is correct 24 The nat force diving an uncharged molccule across the plasma membrane by passive transpot is (a) Concentration gradient (b) Charge of the moleculc (c) Membrane potentia d) More than one is correct 25. A cell is recognized by other tissue members as "self by its surface (a) Glycoprotcins (b) Lipids (d) Membrane proteins 26 lon channels are not continuously open and are highly selective 27. Initiating an action potential works best at short distances 28. The net force driving a charged molecule across the plasma membrane by passive transport is (a) True (b) False (a) True (b) False (a) Concentration gradient (b) Charge of the molecule (c) Membrane potential (d) More than one is correct 29 Chemical signal released by nerve cells is (a) Ligand (b) Neurotransmitter Nerve cells are the only cells with a resting membrane potential? (a) True (c) Proteins (d) Glycogen 30 (b) False

Explanation / Answer

16.(a) Cell wall

Explaination- Plant cells are enclosed by a rigid structure called cell wall. When plant cell is placed in a hypotonic solution it takes in water by osmosis and starts swelling.The cell wall prevents cell from bursting due to its rigidity.

17.(b) Hypotonic solution

Explaination - Hypotonic solution have a lower concentration of solute than the inside the cell. When cell placed in a hypotonic solution water goes into the cell through osmosis to balance the solute concentration on both outside and inside.when concentration difference is high then excess entry of water may cause cytolysis.

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