Question

1. the krebs cycle occurs in which part of the cell?

a) nucleus
b) cytoplasm
c) matrix of the mitochondrion
d) ribosome

1. when oxygen is not available, muscle cells switch to:

a) aerobic respiration
b) alcoholic fermentation
c) lactic acid fermentation
d) the electron transport chain

1. which term best describes the process of building atp molecules from adp and phosphate groups?

a) fermentation
b) synthesize
c) glycolysis
d) catabolism

Explanation:

• For question 8, the Krebs cycle occurs in the matrix of the mitochondrion. It is a key part of cellular respiration.
• For question 9, when oxygen is not available, muscle cells switch to lactic - acid fermentation to produce energy.
• For question 10, the process of building ATP molecules from ADP and phosphate groups is called synthesis.

Answer:

1. c) Matrix of the mitochondrion
2. c) Lactic acid fermentation
3. b) Synthesize