Question

1. what type of respiration occurs when oxygen is not available?

a. aerobic respiration
b. photosynthesis
c. anaerobic respiration (fermentation)
d. chemosynthesis

1. which of the following occurs during yeast fermentation?

a. oxygen is required for atp production.
b. glucose is broken down into alcohol, carbon dioxide, and energy.
c. water and sunlight are converted into glucose.
d. energy is stored in oxygen molecules.

1. what is the main function of atp in cells?

a. to provide energy for cellular activities
b. to carry oxygen
c. to store genetic information
d. to absorb sunlight

1. when a cell needs energy, what happens to atp?

a. it combines with glucose.
b. it is broken down into adp and a phosphate group, releasing energy.
c. it is converted into sunlight energy.
d. it becomes part of dna.

Explanation:

• Question 7: Aerobic respiration requires oxygen. Photosynthesis is the process of converting light energy into chemical energy. Chemosynthesis uses chemical energy. Anaerobic respiration (fermentation) occurs without oxygen.
• Question 8: In yeast fermentation (anaerobic), glucose is broken down into alcohol, carbon dioxide, and energy. Oxygen is not required (A is wrong). Water and sunlight to glucose is photosynthesis (C is wrong). Energy is not stored in oxygen molecules (D is wrong).
• Question 9: ATP provides energy for cellular activities. Carrying oxygen is hemoglobin's role (B is wrong). Storing genetic information is DNA's role (C is wrong). Absorbing sunlight is for photosynthesis (D is wrong).
• Question 10: When a cell needs energy, ATP is broken down into ADP and a phosphate group, releasing energy. It doesn't combine with glucose (A is wrong). It's not converted into sunlight energy (C is wrong). It doesn't become part of DNA (D is wrong).

Answer:

1. C. Anaerobic respiration (fermentation)
2. B. Glucose is broken down into alcohol, carbon dioxide, and energy.
3. A. To provide energy for cellular activities
4. B. It is broken down into ADP and a phosphate group, releasing energy.