Question

section 7 review, continued

1. cellular respiration always releases --

a oxygen.
b carbon monoxide.
c energy.
d lactic acid.

1. during aerobic cellular respiration, one

molecule of glucose is used to produce how
many atp molecules?
a 2
b 8
c 36
d 40

1. which of the following correctly summarizes

aerobic cellular respiration?
a $6o_{2}+c_{6}h_{12}o_{6}\to 6co_{2}+6h_{2}o + energy$
b $6o_{2}+c_{6}h_{12}o_{6}+energy\to 6co_{2}+6h_{2}o$
c $6co_{2}+6h_{2}o\to 6o_{2}+c_{6}h_{6}o_{6}+energy$
d $6co_{2}+6h_{2}o + energy\to 6o_{2}+c_{6}h_{12}o_{6}$

1. which of these is broken down during cellular

respiration to release energy?
a food molecules
b adp
c water
d carbon dioxide

1. which of these occurs in the cytoplasm?

a glycolysis
b electron transport
c krebs cycle
d photosynthesis

1. lactic acid fermentation occurs in --

a bread that is rising.
b any environment without oxygen.
c muscle cells.
d mitochondria.

1. muscle soreness can be caused by --

a the krebs cycle.
b glycolysis.
c lactic acid fermentation.
d the calvin cycle.

1. when oxygen is present, what follows

glycolysis?
a photosynthesis
b lactic acid fermentation
c alcohol fermentation
d the krebs cycle

Explanation:

• Question 8: Cellular respiration is a process that breaks down molecules to release energy. Oxygen is consumed (not released), carbon - monoxide is not a product, and lactic acid is only produced in anaerobic conditions. Energy (in the form of ATP) is always released.
• Question 10: In aerobic cellular respiration, one molecule of glucose is used to produce 36 ATP molecules. Glycolysis produces 2 ATP, but with the Krebs cycle and electron transport chain (in the presence of oxygen), the total is 36.
• Question 11: The equation for aerobic cellular respiration is \(6O_{2}+C_{6}H_{12}O_{6}\to6CO_{2}+6H_{2}O + Energy\). Option B has energy on the reactant side (incorrect), option C is the reverse of photosynthesis, and option D is also incorrect as it has the wrong direction for the reaction and energy placement.
• Question 12: During cellular respiration, food molecules (such as glucose) are broken down to release energy. ADP is combined with a phosphate group to form ATP (not broken down for energy release in the sense of the question), water and carbon dioxide are products.
• Question 13: Glycolysis occurs in the cytoplasm. The electron transport chain and Krebs cycle occur in the mitochondria, and photosynthesis occurs in the chloroplasts (in plant cells).
• Question 14: Lactic acid fermentation occurs in muscle cells (when there is not enough oxygen for aerobic respiration). Bread rising is due to alcohol fermentation (by yeast), lactic acid fermentation is not in any environment without oxygen (some environments may have other fermentation types), and mitochondria are involved in aerobic respiration.
• Question 15: Muscle soreness is caused by lactic acid fermentation. The Krebs cycle is part of aerobic respiration (no soreness from that in the context of muscle soreness here), glycolysis alone (without fermentation in this context) doesn't cause soreness, and the Calvin cycle is part of photosynthesis.
• Question 16: When oxygen is present, after glycolysis, the Krebs cycle occurs. Photosynthesis is a separate process (not following glycolysis in this context), lactic acid and alcohol fermentation occur in the absence of oxygen.

Answer:

• Question 8: C. Energy
• Question 10: C. 36
• Question 11: A. \(6O_{2}+C_{6}H_{12}O_{6}\to6CO_{2}+6H_{2}O + Energy\)
• Question 12: A. Food molecules
• Question 13: A. Glycolysis
• Question 14: C. Muscle cells
• Question 15: C. Lactic acid fermentation
• Question 16: D. The Krebs cycle