Chapter 5 quiz- BIOL

Which one of the following is most similar to the mechanism of an enzyme inhibitor? A) keeping someone from parking by parking in their designated spot B) driving the wrong way on a one-way street C) forgetting to put a cap back on a pen D) changing the tires on a car

A) keeping someone from parking by parking in their designated spot

An object at rest has no ______ energy, but it may have ______ energy resulting from its location or structure. A) kinetic... potential B) kinetic... conserved C) potential... kinetic D) stored... potential

A) kinetic... potential

Which component of the following reaction is the substrate? sucrose + sucrase + water → sucrase + glucose + fructose A) sucrose B) sucrase C) glucose D) fructos

A) sucrose

Which one of the following is true? A) An enzyme's function depends on its three-dimensional shape. B) Enzymes work generally on a broad range of substrates. C) Enzymes are used up in chemical reactions. D) Enzymes emerge changed from the reactions they catalyze.

An enzyme's function depends on its three-dimensional shape.

Ten kilocalories are equivalent to ______ calories. A) 1,000 B) 10,000 C) 0.1 D) 100

B) 10,000

What compound directly provides energy for cellular work? A) C6H12O6 B) ATP C) DNA D) fat

B) ATP

When two solutions that differ in solute concentration are placed on either side of a selectively permeable membrane, and osmosis is allowed to take place, the water will ______. A) exhibit a net movement to the side with lower water concentration B) exhibit a net movement to the side with higher water concentration C) exhibit a net movement to the side with lower solute concentration D) exhibit an equal movement in both directions across the membrane

A) exhibit a net movement to the side with lower water concentration

Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach. This enzyme is a protein. Which of the following processes could be responsible for its secretion? A) endocytosis B) exocytosis C) phagocytosis D) passive transport

B) exocytosis

Facilitated diffusion across a biological membrane requires ______ and moves a substance ______ its concentration gradient. A) energy... down B) transport proteins... down C) energy and transport proteins... against D) transport proteins... against

B) transport proteins... down

Enzymes increase the rate of a reaction by ______. A) increasing the temperature of the substrates B) contributing electrons to the reaction C) decreasing activation energy D) changing the pH of the substrates

C) decreasing activation energy

When a person cries, tears are exported from cells through the process of A) facilitated diffusion. B) active transport. C) endocytosis. D) exocytosis.

C) endocytosis

A balloon permeable to water but not to glucose contains a 10% glucose solution. A beaker contains a 5% glucose solution. Which of the following is true? A) The solution in the beaker is hypertonic relative to the solution in the balloon. B) The solution in the balloon is isotonic; the solution in the beaker is hypertonic. C) When placed in the beaker, the balloon will lose water by osmosis. D) The solution in the balloon is hypertonic relative to the solution in the beaker.

D) The solution in the balloon is hypertonic relative to the solution in the beaker.

In a hypotonic solution, a plant cell will ______. A) undergo plasmolysis B) become flaccid C) burst D) become turgid

D) become turgid

The sum total of all the chemical reactions that occur in organisms is called ______. A) summation B) cellular synthesis C) replication D) metabolism

D) metabolism

Diffusion is an example of ______. A) phagocytosis B) active transport C) endocytosis D) passive transport

D) passive transport