B) P Only A and B are cell to the cytoplasm of an adjacent cell through E) A, B,
ID: 87454 • Letter: B
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B) P Only A and B are cell to the cytoplasm of an adjacent cell through E) A, B, and Care all B intermediate flawsMs ED gapjanctions membrane? 23, which of the folkomine typesof mossowles are the major structural components of the cell A) phospholipids and B) nucleic acids and proteins C phospholioids and proteins DO proteins and cellulose E) glycoproteins and cholesterol 24 a hypotonic solution an animal cell will A)lyse (burst, B) experience forgor, C) neither gain mor lose water, D shrivel, ED lote water initially and then experience turgor, 25 Which the following statements regarding enzymes is true? A) Enzymes decrease the free energy change of a reaction. B) Enzymes increase the rate of reaction, catalyze. c Enzymes are permanently akered bythe reactions they Do A and B 20, cells are ofen bound to the extracellular matrix by in the plasma membrane. A) carbohydrates BU cholesterol C phospholipids D proteins ribosomes Whe dse ollowing would likely move through the lipidbilayer of a plasma membrane most rapidly? A CO2 Boas amino acid 2a AN Mowing membrane activities reguire energy from ATP hydrolysis except A) facilitated diffusion, ions moving our of the cell isms moving into cellExplanation / Answer
21. E) A, B and C are all correct.
Both sodium and potassium are pumped out of the cell against their concentration gradients and the proton pumps also undergo conformational change.
22. A) Plasmodesmata
Plasmodesmata is a junction like structure that joins cytoplasm to cytoplasm and thus ions can travel directly from cytoplasm to cytoplasm.
23. A) phospholipids and cellulose
Major cellular components are the phospholipids that form the bilayer of the cellular membrane.
24. D) Shrivel
The cells shrink in a hypertonic solution as water moves out of the cell in order to make an isotonic environment.
25. B) Enzymes increase the rate of a reaction
Enzymes make a reaction faster by bringing down the activation energy, though the free energy of a reaction remains unchanged.
26. D) proteins
27. A) CO2
Gases move fastest as they do not need a carrier to pass through, neither are they bound by size.
28. A) Facilitated diffusion
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