11. Many types of cells have stores of lipids in their cytoplasm, usually seen a
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11. Many types of cells have stores of lipids in their cytoplasm, usually seen as fat droplets. What is the lipid most commonly found in these droplets? (a) cholesterol (b) palmitic acid (c) Isoprene (d) triacylglycerol 12. Chemical reactions carried out by living systems depend on the ability of some organisms to capture and use atoms from nonliving sources in the environment. The specific subset of these reactions that break down nutrients in food can be described as (c) anabolic (d) biosynthetic (a) catabolic (b) metabolic 13. Oxidation is the process by which oxygen atoms are added to a target molecule. Generally, the atom that is oxidized will experience which of the following with respect to the electrons in its outer shell? (a) a net gain (c) no change (d) an equal sharing (b) a net loss 14. Catalysts are molecules that lower the activation energy for a given reaction. Cells produce their own catalysts called (a) proteins (b) enzymes (c) cofactors (d) complexes G° indicates the change in the standard free energy as a reactant is converted to product. Given what you know about these values, which reaction below is the most favorable? 15. (a) ADP + Pi ATP (b) glucose 1-phosphate glucose 6-phosphate (c) glucose + fructose sucrose (d) glucose > CO2+ H20 AGo +7.3 kcal/mole AG 1.7 kcal/mole AGo +5.5 kcal/mole AGo686 kcal/moleExplanation / Answer
11) Triacyl glycerol is the answer.It is mainly composed of glycerol and fatty acid.
12) the answer is (a) (catabolic).Catabolic is the breakdown of larger molecule into smaller molecule.Anabolic can't be the answer as it is the formation of large molecule from smaller one.metabolic is the anabolic+ catabolic.biosynthetic reactions are the reaction which synthesise somethings.
13) The answer is b (net loss).As oxidation involves the loss of electron.Gain of electron is the featurw of reduction.
14) The answer is b (enzymes).Enzymes are biocatalyst which convert reactant into product.
15) The answser is d.
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