Unit 3 Quiz 3 Cellular Respiration - AP Bio

Which process is the largest contributor to the release of CO₂ 

• Citric Acid Cycle or Krebs Cycle
• Pyruvate Oxidation
• Glycolysis
• Oxidative Phosphorylation 

How is cellular respiration related to photosynthesis?

• Both require oxygen to start

• It is the reverse reaction of photosynthesis

• Both start with glycolysis

• Both end with 38 ATP for cells

Glucose is broken down into pyruvate in a process known as 

• glycolysis
• electron transport
• the Krebs cycle
• phosphorylation

The Electron Transport Chain (ETC) occurs across the ________ and so extra folds called ________ enable it to occur more often

• Mitochondrial matrix, villi

• Outer mitochondrial membrane, flagella

• Inner mitochondrial membrane, cristae

• Cytoplasm, endoplasmic reticulum

A weightlifter is using heavy weights in short bursts for a competition. Because his muscle cells are not able to take in enough oxygen to make very much ATP the weightlifter begins to get fatigue in his muscles. Which of the following processes is most likely going on in the muscles of the weightlifter as he competes in his event?

• As the cells run out of oxygen they switch to anaerobic respiration (fermentation), which allows the cell to make small amounts of ATP in the absence of oxygen.

• As the cells run out of oxygen, they die off gradually and the weightlifter's muscles have fewer contracting muscle cells.

• The cells will never run out of oxygen if the weightlifter is breathing.

• As the cells run out of oxygen, they will continue to make the same amount of ATP, since oxygen is not required to make ATP.

What does it mean to phosphorylate ADP?

• To add P, to ADP forming ATP and increasing the free energy of the molecule

• Removing a P, from ADP to become AMP and release energy

• ADP is being used to power other reactions

• ADP is being created by the reaction

Anaerobic respiration yields about ______ ATP per glucose whereas aerobic respiration yields about _______ net ATP per glucose.

• 30-32, 2

• 2, 30-32

• 2, 18

• 18, 2

The electrons that transfer energy to pump protons across the inner mitochondrial membrane were supplied by

• ATP and NADPH

• NADH and FADH2

• water and oxygen

How many ATP are gained through glycolysis?

• 0
• 2
• 4
• 30-38

During chemiosmosis

• H+ ions serve as the final electron acceptor
• a concentration gradient is generated when H+ ions are passively transported from the matrix to the intermembrane space of the mitochondrion
• energy is released as H+ ions move freely across the mitochondrial membrane
• ATP is synthesized when H+ ions move through a channel in ATP synthase