Carbohydrate
Aldolases splits fructose 1,6 biphosphate into

glyceraldehyde 3- phosphate
glyceraldehyde 3- phosphate and dihydroxyacetone phosphate
None of these
dihydroxyacetone phosphate

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Carbohydrate
Which of the following statements about the energy needs of cells is false?

The most usable energy for cells comes from the rapid combustion of glucose
Many cellular reactions have an associated activation energy
The laws of thermodynamics force cells to acquire energy
Without a continuous input of energy, cell disorder will increase

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Carbohydrate
The glycosidic bond

both (b) and (c)
in maltose is not hydrolyzed in lactose intolerant humans
joins glucose and fructose to form sucrose
in sucrose is hydrolyzed by bees

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Carbohydrate
The multistep pathways of metabolism are efficient because they

use the same substrate for all of the enzymes in the pathway
spread the enzymes for a pathway into several different organelles
locate all of the enzymes for a pathway in the same place within the cell
use the same enzyme for all of the substrates in the pathway

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Carbohydrate
When living organisms are cooled below some critical body temperature, the metabolic reactions within their cells cease to function properly. This malfunction occurs because

enzyme active sites become permanently bound to substrates
the activation energy for the reaction is raised
their enzymes lose the proper three-dimensional shape
there is insufficient molecular motion for substrates to interact

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