22. The main function of cellulose, a. to store genetic information. b. as a sto

Question

22. The main function of cellulose, a. to store genetic information. b. as a storage compo c. as a storage compound for energy in animal cells. d. as a component of biological membranes. e. to provide mechanical strength to plant cell walls. the most abundant organic compound on Earth, is und for energy in plant cells. 23. The component of aerobic respiration that produces the most ATP per a. the electron transport chain. b. the citric acid cycle. c. glycolysis. d. lactic acid fermentation. e. alcoholic fermentation mole of glucose is 24. Lipids are a. insoluble in water. b. important for energy storage. c. hydrophobic. d. important constituents of biological membranes. e. All of the above 25. According to the chemiosmotic theory, the energy for the synthesis of ATP as electrons flow down the respiratory chain is provided directly by the a. hydrolysis of GTP. b. reduction of NAD c. diffusion of protons. d. reduction of FAD. e. hydrolysis of ATP. 26. A molecule that has an important role in limiting what gets into and out of cells is a. glucose. b. maltose c. a phospholipid. d. a fat. e. a phosphohexose. 27. Phosphorylation of ADP to ATP is endergonic, whereas the hydrolysis of ATP to ADP is exergor two reactions are therefore a. substrates. b. endergonic. c. kinetic. d. activated. e. linked

Explanation / Answer

1) The correct option is e. to provide mechanical strength to plant cell walls.

Cellulose is the component of wood. It is most abundant on the surface of the Earth. It provides strength and rigidity. It forms the cell walls of plants, which provides mechanical strength.

2) The correct option is a. the electron transport chain.

The electron transport chain of the cellular respiration process. which produces maximum ATP.

3) The correct option is e. All of the above.

Lipids are non-polar and hydrophobic. They are insoluble in water. They are used for long term energy storage. They also contain more energy per gram than carbohydrates. They are essential component of biological membranes and waterproof covering.

4) The correct option is c. diffusion of protons.

The energy for the synthesis of ATP during the flow of electrons down the respiratory chain is provided directly by the diffusion of protons. Protons move through ATP synthase and ADP is turned into ATP.

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