1. Organisms can synthesize ATP by oxidative phosphorylation when they

A. ferment
B. oxidize glucose to pyruvate
C. pass electrons from the oxidation of chlorophyll through an electron transport system
D. pass electrons to oxygen through an electron transport system containing cytochromes

2. How many molecules of carbon dioxide will be given off during ten turns of the Krebs cycle?

A. 10
B. 20
C. 30
D. 40

3. In cellular metabolism, O₂ is used

A. to provide electrons for photophosphorylation
B. in glycolysis
C. as a terminal electron acceptor
D. in the Krebs cycle

4. In glycolysis, ATP is created by

A. photophosphorylation
B. the chemiosmotic mechanism
C. substrate level phosphorylation
D. the pentose phosphate pathway

5. Suppose a eukaryotic cell had a mutation that prevented the production of cytochrome c. As a result of this mutation, which of the following processes would not occur?

A. Cellular respiration
B. Photosynthesis
C. Mitosis
D. Cell wall synthesis