Unit 6

Multiple Choice

Why is chemical energy in food important for living organisms?

• It provides the energy needed for growth and reproduction.

• It helps organisms to breathe.

• It allows organisms to see in the dark.

• It is used only for movement.

Multiple Choice

What compound is produced by cells to power their activities during cellular respiration?

• ATP

• DNA

• Glucose

• Oxygen

Fill in the Blank

Cellular respiration is the process that releases energy by breaking down food molecules in the presence of ___.

Multiple Select

Which of the following are stages of cellular respiration?

• Glycolysis

• The Krebs Cycle

• The Electron Transport Chain

• Photosynthesis

Fill in the Blank

The first step of cellular respiration is ___.

Multiple Choice

Where does glycolysis occur in the cell?

• Cytoplasm

• Mitochondria

• Nucleus

• Ribosome

Multiple Choice

Which of the following is an advantage of glycolysis?

• It produces ATP very fast.

• It requires oxygen to function.

• It only occurs in the presence of light.

• It produces more ATP than the electron transport chain.

Multiple Select

Which of the following are net results of glycolysis?

• 2 ATP are gained

• 2 NADH are gained

• 2 pyruvic acid are formed

• 8 NADH are gained

Multiple Choice

What is the main function of the electron transport chain in cellular respiration?

• To convert ADP into ATP using high energy electrons

• To break down glucose into pyruvic acid

• To produce carbon dioxide

• To generate NADH and FADH2

Multiple Choice

How many ATP molecules are produced from the complete breakdown of glucose in the presence of oxygen?

• 2

• 8

• 36

• 32

Multiple Choice

Which of the following processes require oxygen and take place inside the mitochondria?

• Krebs cycle and electron transport chain

• Glycolysis and fermentation

• Photosynthesis and glycolysis

• Fermentation and electron transport chain

Multiple Choice

Which of the following statements correctly compares photosynthesis and cellular respiration?

• Photosynthesis captures energy, while cellular respiration releases energy.

• Both processes capture energy.

• Photosynthesis and cellular respiration both release energy.

• Photosynthesis releases energy, while cellular respiration captures energy.

Multiple Choice

Which organisms are capable of releasing energy by cellular respiration?

• Plants, animals, fungi, protists, and most bacteria

• Only plants and animals

• Only plants, algae, and some bacteria

• Only animals and fungi

Multiple Select

Which of the following statements about fermentation are correct?

• Fermentation occurs in the cytoplasm.

• Fermentation can release energy in the absence of oxygen.

• Fermentation requires oxygen.

• Fermentation only occurs in plants.

Multiple Select

Which of the following are products of alcoholic fermentation?

• Ethyl alcohol

• Carbon dioxide

• Lactic acid

• NAD+

Multiple Choice

The reactants required for cellular respiration are

• carbon dioxide and oxygen.

• glucose and water.

• glucose and oxygen.

• carbon dioxide and water.

Multiple Choice

Glycolysis occurs in the

• mitochondria.

• cytoplasm.

• nucleus.

• chloroplasts.

Multiple Choice

Fermentation releases energy from food molecules in the absence of

• oxygen.

• glucose.

• NADH.

• alcohol.

Open Ended

What questions do you still have about how chemical energy in food is used by living things?

Multiple Choice

How does food provide energy for living things?

• By providing chemical building blocks and releasing energy when chemical bonds are broken

• By providing only vitamins and minerals

• By supplying only water

• By giving only physical support