Biology Chapter 7 Practice Test (Questions & Answers)

Which of the following statements best describes cellular respiration?

Carbon-based molecules from food and oxygen are used to make ATP

Which process breaks down sugars to make ATP when oxygen is present?

Cellular Respiration

Which process is best represented by the following chemical equation? sugars + oxygen ---> carbon dioxide + water

Cellular Respiration

Which of the following types of organisms uses cellular respiration for their cellular energy needs?

Eukaryotes

In which process is lactic acid formed when there is not enough oxygen present for cellular respiration to take place?

Fermentation

Before cellular respiration, glucose must be broken down by the process of

Glycolysis

The part of cellular respiration in which glucose is broken down is called

Glycolysis

Which of the following is a reactant in photosynthesis?

CO2

Which of the following molecules found in the food we eat is most commonly broken down to make ATP?

Carbohydrates

Which end product of alcoholic fermentation is important in the baking industry?

Carbon Dioxide

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

Carbon Dioxide

Which of the following is best shown by Figure 4.2 below?

Electron Transport Chain

What provides the electron transport chain in cellular respiration with the energy it needs to function?

Krebs Cycle

Which end product of fermentation causes the burning feeling muscles that are working hard?

Lactic Acid

The water molecules labeled A in Figure 4.1 are going to the thylakoids to take part in which process?

Light-dependent reactions

The part of cellular respiration that needs oxygen takes place inside the

Mitochondria

An electron transport chain that produces ATP is part of both the cellular respiration processes and

Photosynthesis

What is the main function of the Krebs Cycle?

Producing molecules that carry high-energy electrons to the electron transport chain

Which of the following are end products of glycolysis?

Pyruvate, NADH, and ATP

Chemosynthesis is a process through which some organisms use energy from chemicals in their environment to build sugars in the absence of

Sunlight

Which phrase about fermentation is correct?

Takes place without oxygen

Why does a runner breathe hard for a few minutes after finishing a race?

The runner's cells are making up for an oxygen deficit

What happens to the sugars that are made during photosynthesis?

They can be used for cellular respiration

Where in plant cells are the energy-absorbing molecules for photosynthesis located?

Thylakoids

What is the function of oxygen in cellular respiration?

To pick up electrons at the end of the electron transport chain

Two products of the Krebs Cycle are

ATP and CO2

Which of the following directly provides the energy needed for cell functions?

A phosphate group is removed from ATP

What molecule carries chemical energy that cells use for their functions?

ATP

In the electron transport chain, energy from the Krebs Cycle is used to pump hydrogen ions

Across the inner mitochondrial membrane

Which phrase best describes the main role of fermentation?

Allows glycolysis to continue making a small amount of ATP