Unit 2 Characteristics of Living Things Regents Review LE

Front

A fully functioning enzyme molecule is arranged in a complex three-dimensional shape. This shape determines the...

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specific type of molecule it interacts with during a reaction

Front

What type of organic molecule is used to cut a segment of DNA for insertion into a bacterium's DNA?

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a carbohydrate

Front

Which statement best describes enzymes?

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The rate of activity of an enzyme might change as pH changes.

Front

Hydrogen peroxide (H2O2) is a toxic by-product of cellular metabolism in aerobic organisms. The reaction below occurs within the cells to prevent the accumulation of hydrogen peroxide. In the reaction to the right, catalase functions as an...

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enzyme in the breakdown of hydrogen peroxide

Front

The graph illustrates that enzymes 1, 2, and 3

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work best at different pH levels

Front

Which section of the graph includes the point at which the enzyme started to denature? Options: I, II, III, IV

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III

Front

Which substance plays a major role in most of the chemical reactions that occur in a living cell? Options: water, glycogen, glycerol, maltose

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water

Front

Which compound is inorganic?
Options: glucose, carbon dioxide, ethane, stearic acid (Cl8H36O2)

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carbon dioxide

Front

Which elements are present in all organic compounds?

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hydrogen and carbon

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The building blocks for a starch molecule are...

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simple sugars