AP Biology Cellular Respiration

When is energy released from ATP?

• When adenosine forms a bond with ribose

• When a phosphate group is removed

• When a phosphate group is added

Organisms that must eat to get energy are categorized as:

• Autotrophs

• Heterotrophs

Which of the following statements are TRUE about the process that occurs in cristae?

• I, II and III

• I, II and IV

• I, III and IV

• I, II, III and IV

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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

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What are the products of aerobic cellular respiration?

• ATP

• Carbon dioxide (CO2)

• Water

• All of the above

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Glucose is broken down into pyruvate in a process known as 

• glycolysis

• electron transport

• the Krebs cycle

• phosphorylation

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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.

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What are the reactants in the equation for cellular respiration?

• oxygen and lactic acid

• carbon dioxide and water

• glucose and oxygen

• water and glucose

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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 inner mitochondrial membrane

• 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