Cellular Respiration Quiz

Which gases are exchanged in the process of cellular respiration as depicted in the diagram?

• Oxygen and Carbon Dioxide

• Nitrogen and Oxygen

• Hydrogen and Nitrogen

• Carbon Monoxide and Oxygen

Answer explanation

Cells use oxygen to release energy from glucose. The process makes carbon dioxide as waste, which is exhaled.

Tags

NGSS.HS-LS1-7

Where does the energy in almost all ecosystems ultimately come from?

• The moon

• The sun

• The soil

• The ocean

Answer explanation

Plants capture sunlight through photosynthesis, and that stored energy moves through the food chain to animals and humans.

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-5

What is released as a waste product during respiration?

• Oxygen

• Glucose

• Carbon dioxide

• Water

Answer explanation

When glucose is broken down for energy, carbon dioxide is released and carried out of the body when we breathe.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Which of the following best describes cellular respiration?

• An endergonic process that stores energy in glucose

• An exergonic process that transfers energy from glucose to form ATP

• A process that only occurs in plants to produce glucose

• A process that uses ATP to create glucose

Answer explanation

Energy stored in glucose is released and converted into ATP, which cells can actually use to power activities.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

How many molecules of ATP can be produced from one molecule of glucose during cellular respiration?

• 2

• 8

• 32

• 64

Answer explanation

A single glucose molecule, when fully broken down, can produce up to 32 ATP through all three stages of respiration.

Tags

NGSS.HS-LS1-7

Which process provides energy for both body maintenance and voluntary activities?

• Cellular respiration

• Photosynthesis

• Fermentation

• Diffusion

Answer explanation

This process makes ATP, which fuels both involuntary functions like heartbeat and voluntary actions like movement.

Tags

NGSS.HS-LS1-7

What is the term for the amount of kcal the body needs for its basic life-sustaining activities?

• Basal metabolic rate

• Active metabolic rate

• Resting heart rate

• Maximum oxygen uptake

Answer explanation

This is the minimum energy (kcal) required for basic life functions such as breathing, circulation, and cell repair.

What is a redox reaction?

• The transfer of electrons from one molecule to another

• The transfer of protons from one molecule to another

• The sharing of electrons between two molecules

• The breaking of chemical bonds without electron transfer

Answer explanation

Energy is moved in respiration through electrons. In redox reactions, one molecule loses electrons and another gains them.

Which of the following always occurs together in a redox reaction?

• Oxidation and reduction

• Precipitation and neutralization

• Combustion and hydrolysis

• Sublimation and deposition

Answer explanation

One molecule is oxidized (loses electrons) and another is reduced (gains electrons). Both happen at the same time.

What happens to oxygen (O₂) during the redox reaction in cellular respiration (specifically the stage oxidative phosphorylation)?

• It loses hydrogen atoms and becomes oxidized

• It gains hydrogen atoms and becomes reduced

• It is converted to glucose

• It is directly converted to ATP

Answer explanation

At the end of the electron transport chain, oxygen combines with electrons and hydrogen ions to form water.

Tags

NGSS.HS-LS1-7