Q: Which of the following best represents the overall equation for cellular respiration?

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

Which of the following best describes the function of enzymes in biological systems?

Accepted Answer

Enzymes lower the activation energy of biochemical reactions, increasing the reaction rate.

Question 2

In the enzyme investigation lab, catalase breaks down hydrogen peroxide. What are the products of this reaction?

Accepted Answer

$$2H_2O_2 \rightarrow 2H_2O + O_2$

Question 3

A student tests the effect of temperature on catalase activity. Which result would you expect if the temperature is increased beyond the enzyme's optimal range?

Accepted Answer

The enzyme will denature, causing a sharp decrease in activity.

Question 4

Which of the following best represents the overall equation for cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 5

During the Poison Case Study, a poison inhibits the electron transport chain in mitochondria. What is the most likely immediate effect on ATP production?

Accepted Answer

ATP production will decrease because the proton gradient cannot be maintained.

Question 6

Which molecule is the primary energy currency of the cell, and what is its full name?

Accepted Answer

ATP, Adenosine Triphosphate

Question 7

In the ATP Candy Modeling activity, what happens when the terminal phosphate group is removed from ATP?

Accepted Answer

Energy is released for cellular work.

Question 8

Which of the following best describes the relationship between photosynthesis and cellular respiration?

Accepted Answer

Photosynthesis stores energy in glucose, while cellular respiration releases energy from glucose.

Question 9

A poison blocks the function of ATP synthase in the mitochondria. Which step of cellular respiration is directly affected?

Accepted Answer

Electron Transport Chain

Question 10

During the Algae Bead Photosynthesis & Respiration lab, what color change in the indicator would you expect if photosynthesis is occurring at a high rate?

Accepted Answer

The indicator becomes more basic (blue) due to decreased CO$$_2.$$

Question 11

Which of the following is a correct summary of the light-dependent reactions of photosynthesis?

Accepted Answer

They use light energy to split water, producing ATP, NADPH, and O$$_2.$$

Question 12

If a plant is placed in the dark, which process will continue and which will stop?

Accepted Answer

Photosynthesis will stop; cellular respiration will continue.

Question 13

Which of the following best explains why enzymes are specific to their substrates?

Accepted Answer

Enzymes have active sites with shapes complementary to their substrates.

Question 14

A student adds a competitive inhibitor to an enzyme-catalyzed reaction. What is the most likely effect?

Accepted Answer

The inhibitor binds to the active site, decreasing enzyme activity.

Question 15

Which of the following is a product of the Krebs cycle?

Accepted Answer

NADH

Question 16

In the context of the labs, why is it important to include a control group in an experiment?

Accepted Answer

To ensure that the results are due to the variable being tested and not other factors.

Question 17

Which of the following best describes the role of oxygen in cellular respiration?

Accepted Answer

Oxygen is the final electron acceptor in the electron transport chain.

Question 18

A student measures the mass of a plant before and after a week of growth in the light. Which process is primarily responsible for the increase in mass?

Accepted Answer

Photosynthesis

Question 19

Which of the following is a correct equation for photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6O_2$$

Unit 3 Lab Packet Study Guide: Enzymes, Cellular Respiration, ATP, and Photosynthesis

Guida di studio - Domande di pratica

Study guide - Flashcard