Cellular Respirtation & Photosynthesis

Question 1

What is cellular respiration?

Answer 1

1. Process by which living cells obtain energy from organic molecules.
2. Main aim is to synthesize ATP and NADH.
3. Oxygen + glucose -> water + carbon dioxide.

Question 2

What are the four metabolic reactions in cellular respiration?

Answer 2

1. Glycolysis: 1 glucose -> 2 pyruvate. ( Net yield: 2 ATP)
2. Breakdown of pyruvate: 2 pyruvate -> 2 acetyl CoA ( CO2 is released)
3. Citric acid cycle: 2 acetyl CoA -> 2CO2 + 1 ATP + 1FADH2 + 3 NADH * 2
4. Oxidative phosphorylation: high energy electrons are removed from NADH and FADH2 to produce 32 to 34 ATP.

Question 3

What is photosynthesis?

Answer 3

Process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

Question 4

Where does photosynthesis take place?

Answer 4

Mesophyll (Internally in leaves).

Question 5

What are the two stages of photosynthesis?

Answer 5

1. Light cycle:
   -Chlorophyll in thylakoid membrane use light to energize electrons.
   -Energized electrons then move down an electron transport system to produce ATP and NADH.
2. Calvin cycle:
   - carbon dioxide is used to produce sugar.
   - ATP and NADH are used are used to carry out this reaction then are converted to ADP and NADP+.