SAT II Biology M : Other Cell Structures

Study concepts, example questions & explanations for SAT II Biology M

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Example Questions

Example Question #6 : Cell Biology

____________ are hollow tubes made up of polymerized tubulin that provide support throughout the cell. 

Possible Answers:

Flagella

Cilia

Fibrae 

Microtubules

Actin

Correct answer:

Microtubules

Explanation:

Microtubules are hollow tubes made up of polymerized tubulin that provide support throughout the cell. 

Example Question #1 : Other Cell Structures

Which of the following characteristics are true of all enzymes? 

Possible Answers:

Enzymes do not alter the equilibrium constant.

Enzymes are not used up in the reaction.

None of the answer choices are correct.

Three of the answer choices are correct.

Enzymes are sensitive to temperature and pH.

Correct answer:

Three of the answer choices are correct.

Explanation:

Enzymes do not alter the equilibrium constant because enzymes are not consumed in the reaction.

Hint: Write out the equation for the equilibrium constant and notice that there is no variable for enzymes. 

Enzymes are sensitive to temperature and pH, as high temperatures and very low pH can cause denaturation of an enzyme. Enzymes are only optimal at certain pH and temperature ranges.

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