25S1 WK5 Cellular Respiration & Photosynthesis

Multiple Choice

The goal of cellular respiration is to:

• make water

• make ATP

• make glucose

• make oxygen

Multiple Choice

Which of the following is the correct equation for aerobic cellular respiration?

• 6CO₂ + 6H₂O ⟶ C₆H₁₂O₆ + 6O₂ + ATP

• 6O₂ + C₆H₁₂O₆ ⟶ 6H₂O + 6CO₂ + ATP

• C₆H₁₂O₆  + 6H₂O ⟶ 6CO₂ + 6O₂ + ATP

• 6O₂ + 6H₂O ⟶ C₆H₁₂O₆ + 6CO₂ + ATP

Multiple Choice

Several molecules are produced as a result of glycolysis.

What is the net production of ATP, pyruvate, and NADH when one molecule of glucose undergoes glycolysis?

• 2 ATP, 2 NADH, and 2 pyruvate

• 4 ATP, 1 NADH, 2 pyruvate

• 4 ATP, 2 NADH, and 4 pyruvate

• 2 ATP, 1 NADH, and 1 pyruvate

Multiple Choice

In what part of the cell does glycolysis take place?

• Cytoplasm

• Mitochondria

• Chloroplast

• Nucleus

Multiple Choice

Which of the following statements is true regarding glycolysis?

• Glycolysis can occur without the presence of oxygen

• Glycolysis takes place in the mitochondria of a cell

• Glycolysis is the final step in aerobic respiration

• Glycolysis produces a net of 1 ATP, 1 NADH, and 2 pyruvate

Multiple Choice

After glycolysis, pyruvate is oxidized to produce carbon dioxide, NADH, and a molecule that contains 2 of the 3 carbons from the pyruvate.

Which product of pyruvate oxidation enters the Krebs cycle?

• Carbon dioxide

• Acetyl-CoA

• NADH

• Glucose

Multiple Choice

In what part of the cell does the Krebs cycle take place?

• Cytosol

• Matrix of the mitochondria

• Cristae of mitochondria

• Outer membrane of mitochondria

Multiple Choice

Which of the following molecules are products of the Krebs cycle?

• NAD+ and FAD

• NADH and FADH2

• NAD+ and FADH2

• NADH and FAD

Multiple Choice

In what part of the cell does the electron transport chain take place?

• Cytosol

• Matrix of the mitochondria

• Cristae of mitochondria

• Outer membrane of mitochondria

Multiple Choice

Which of the following is true of the electron transport chain (ETC)?

• The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the ETC.

• The movement of electrons down the ETC drives the formation of a H+ gradient.

• The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC.

• The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase.

Multiple Choice

Which of the following statements regarding ATP synthesis by ATP synthase is correct?

• The energy from a proton gradient is used to power ATP synthase

• ATP synthase regenerates electron carriers like NADH and FADH2

• ATP synthesis creates a proton gradient that causes electron flow through an electron transport chain (ETC).

• A temperature gradient drives ATP synthesis.

Multiple Choice

What is true of NAD in cellular respiration?

• NAD carries the oxygen needed to break down the glucose molecules into the cell.

• NAD is used to directly break apart the glucose molecules.

• NAD carries and transfers electrons and H+ ions.

• NAD carries excess carbon dioxide out of the cell.

Multiple Choice

Which diagram most accurately summarizes the process of cellular respiration?

Multiple Choice

What stage of cellular respiration produces the most number of ATP?

• Glycolysis

• Krebs cycle

• Electron transfer chain

• anaerobic respiration

Multiple Choice

Which statement best compares aerobic and anaerobic respiration? 

• Less ATP is generated during anaerobic respiration than during aerobic respiration. 
• More water is generated during anaerobic respiration than during aerobic respiration. 
• More oxygen is generated during anaerobic respiration than during aerobic respiration. 
• Less lactic acid is generated during anaerobic respiration than during aerobic respiration. 

Multiple Choice

Gwen is investigating how exercise affects the rate at which she can squeeze a ball. After several minutes, she begins to experience muscle soreness and fatigue. She knows that this means her muscles are beginning to run out of oxygen.

Which process is likely causing the soreness in her muscle cells?

• Lactic acid fermentation

• Photosynthesis

• Ethanol fermentation

• Krebs cycle

Multiple Choice

Where does photosynthesis take place?

• Cell wall
• Chloroplasts
• Cytoplasm
• Mitochondria

Multiple Choice

The flat disk-like structures inside the chloroplast are called

• Pancakae
• Stroma
• Lamellae
• Thylakoids

Multiple Choice

Stacks of thylakoids are called

• Granum / grana
• Lamellae
• Stroma
• High-rise

Multiple Choice

Which of the following is the correct equation for photosynthesis?

• 6O2 + 6H2O ➔ C6H12O6 + 6CO2
• O2 + H2O ➔ C6H12O6 + CO2
• 6CO2 + 6H2O ➔ C6H12O6 + 6O2
• CO2 + H2O ➔ C6H12O6 + O2

Multiple Choice

Where in the chloroplast does the light dependent phase occur?

• Stroma

• Thylakoid membrane

• Grana

• Cytosol

Multiple Choice

Photosynthesis can be divided into two steps: the light-dependent reactions and the Calvin cycle.

Which of the following correctly describes the overall process of the light-dependent reactions?

• During the light-dependent reactions, carbon fixation occurs

• The light-dependent reactions occur in the stroma of choloroplasts

• Light energy is converted into chemical energy in the form of ATP and NADPH

• ATP and NADPH are used to make carbohydrates

Multiple Choice

Rubisco is:

• a pigment which captures light energy

• a membrane protein used to transport electrons

• an enzyme which catalyzes carbon fixation

• a simple glucose monomer produced in the calvin cycle

Multiple Choice

What is the product of the light independent phase of photosynthesis?

• Rubisco enzyme

• Glucose

• Oxygen

• Carbon dioxide

Multiple Choice

The Calvin cycle is considered light-independent because it can occur in darkness. However, most often the Calvin cycle takes place in sunlight.

Which of the following likely explains why?

• The enzymes involved in the Calvin cycle are unable to bind substrates in the dark.

• Sunlight is important in activating carbon fixation in the Calvin cycle.

• The Calvin cycle requires ATP and NADPH, which require sunlight to be produced.

• RuBP regeneration requires sunlight in order to occur and continue the Calvin cycle.

Multiple Select

Given the shape of the graph above, which variable(s) could be on the x axis?

(Select all that apply)

• Light intensity  

• Temperature 

• Carbon dioxide concentration 

• Oxygen concentration

Multiple Choice

Which diagram most accurately summarizes the process of photosynthesis?

Multiple Choice

Which of the following steps occurs in the light-independent reactions of photosynthesis but not in the light-dependent reactions?

• Chemical reactions produce oxygen, ATP, and NADPH

• ATP and NADPH are used to fix inorganic carbon

• Chlorophylls absorb light energy, which eventually breaks the bonds of water molecules