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Home  arrow Chapter 5: The Working Cell  arrow Student Home  arrow Pre-Test

Pre-Test



This activity contains 10 questions.

Question 1.

The plasma membrane is selectively permeable. Which of the following can pass freely through the membrane with no assistance?

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Question 2.
In oil-based liquids, phospholipids are arranged so that their _____ face outward and their _____ are orientated inward.


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Question 3.
The movement of molecules from an area of higher concentration to an area of lower concentration is called _____.


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Question 4.
When water moves toward the solution with the _____ solute concentration, the solution is _____.


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Question 5.

Our cells require glucose to produce energy. Consider a cell where the external concentration of glucose has dropped to 5%, but the internal concentration is at 20%. How does the cell obtain more glucose?

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Question 6.
Energy can be classified as either potential or kinetic. Which of the following is an example of kinetic energy?


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Question 7.
Reactions can be exergonic or endergonic. Which of these reactions is endergonic?


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Question 8.
Through an _____ reaction, ATP is hydrolyzed into ADP by _____ and _____ energy.


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Question 9.

During enzymatic reactions, substrates are converted to products. A property of enzymes that facilitates this reaction is that they are catalysts and therefore _____.

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Question 10.
Lactase is essential for digesting lactose in milk. This enzyme is specific for this sugar. Why?


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