Question 1

Which of the following best describes the process of hydrolysis in biological systems?

Accepted Answer

The breakdown of a molecule using water

Question 2

What is the primary function of ATP in cellular metabolism?

Accepted Answer

To transfer energy for cellular work

Question 3

Which equation correctly represents the breakdown of ATP to release energy?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{Phosphate} + \mathrm{Energy}$$

Question 4

Enzymes lower the activation energy of a reaction by:

Accepted Answer

Stabilizing the transition state and bringing substrates together

Question 5

Which of the following factors can affect enzyme activity and shape?

Accepted Answer

pH and temperature

Question 6

Which cell structure is present in both prokaryotic and eukaryotic cells?

Accepted Answer

Cell membrane

Question 7

What is the main difference between eukaryotic and prokaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus, prokaryotic cells do not

Question 8

During cellular respiration, which molecule is the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen

Question 9

Which stage of cellular respiration produces the most ATP molecules?

Accepted Answer

Oxidative phosphorylation (electron transport chain)

Question 10

Which of the following is the correct word formula for cellular respiration?

Accepted Answer

Glucose + Oxygen → Carbon dioxide + Water + ATP energy

Question 11

In photosynthesis, what is the main purpose of glucose production?

Accepted Answer

To provide energy for cellular respiration

Question 12

Which enzyme is responsible for breaking down glucose during cellular respiration?

Accepted Answer

Hexokinase

Question 13

What happens during glycolysis?

Accepted Answer

Glucose is split into two pyruvate molecules and ATP is produced

Question 14

Which of the following best describes the role of mitochondria in eukaryotic cells?

Accepted Answer

Site of cellular respiration and ATP production

Question 15

Which process involves the loss of hydrogen atoms from glucose during cellular respiration?

Accepted Answer

Oxidation

Question 16

If the pH of an environment changes drastically, what is most likely to happen to an enzyme?

Accepted Answer

It will denature and lose its function

Question 17

Which of the following is NOT a product of cellular respiration?

Accepted Answer

Oxygen

Question 18

A scientist is studying a cell that lacks a nucleus and mitochondria. What type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 19

Which of the following statements about enzymes is TRUE?

Accepted Answer

Enzymes are specific to their substrates

Question 20

During which stage of cellular respiration is the majority of NADH produced?

Accepted Answer

Citric acid cycle

Chapter 5/6 Biology Study Notes: The Working Cell

Study Guide - Practice Questions