Question

1. which occurs during the krebs cycle? *

breaking down pyruvate.
capturing light energy.
creating glucose molecules.
producing ethyl alcohol.

1. where does the krebs cycle occur? *

mitochondrial matrix.
mitochondrial membrane.
cytoplasm.
thylakoid.

1. which describes the process of glycolysis? *

aerobic process, breaks down glucose.
anaerobic process, breaks down glucose.
anaerobic process, manufactures glucose.
aerobic process, manufactures glucose

Explanation:

Question 15

• "Breaking down pyruvate": The Krebs Cycle (Citric Acid Cycle) starts with the breakdown of pyruvate (from glycolysis) into acetyl - CoA, and then further processes the acetyl - CoA.
• "Capturing light energy": This is part of photosynthesis (light - dependent reactions), not the Krebs Cycle.
• "Creating glucose molecules": This is gluconeogenesis or photosynthesis, not the Krebs Cycle.
• "Producing ethyl alcohol": This is alcoholic fermentation, an anaerobic process, not the Krebs Cycle.

• "Mitochondrial matrix": The Krebs Cycle occurs in the mitochondrial matrix.
• "Mitochondrial membrane": The electron transport chain (part of cellular respiration) is associated with the mitochondrial membrane (inner), not the Krebs Cycle.
• "Cytoplasm": Glycolysis occurs in the cytoplasm, not the Krebs Cycle.
• "Thylakoid": Thylakoids are part of chloroplasts and are involved in photosynthesis (light - dependent reactions), not the Krebs Cycle.

• "Aerobic process, breaks down glucose": Glycolysis can occur in both aerobic and anaerobic conditions, but it is an anaerobic process in terms of not requiring oxygen directly. Also, it breaks down glucose into pyruvate.
• "Anaerobic process, breaks down glucose": Glycolysis is an anaerobic process (does not require oxygen) and it breaks down one molecule of glucose into two molecules of pyruvate.
• "Anaerobic process, manufactures glucose": Glycolysis breaks down glucose, it does not manufacture it.
• "Aerobic process, manufactures glucose": Glycolysis does not manufacture glucose and it is not strictly an aerobic process.

Answer:

Breaking down pyruvate.

Question 16