For each aspect of metabolism indicate whether it occurs during photosynthesis,

Question

For each aspect of metabolism indicate whether it occurs during photosynthesis, respiration, both or neither

an electron transport chain is used to generate ATP

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

use NAD+ as an electron carrier

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

use NADP as an electron carrier

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

involve active transport of protons across a membrane

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

generate Oxygen as a waste product

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

generate Carbon dioxide as a waste product

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

use Carbon dioxide as a reagent

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

require water molecules as an electron source

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

results in the production of organic acid by-products

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

involves proton flow through ATP synthase

      [ Choose ]            photosynthesis            both photosynthesis and respiration            neither photosynthesis nor respiration            respiration      

Explanation / Answer

1. Both photosynthesis and respiration

Explanation:- Both processes use Electron Transport Chain (ETC), associated proton pump and ATP synthase. In photosynthesis electrons enter transport chain after receiving light energy, where as in respiration, electrons are provided by organic food molecule.

2. Respiration

Explanation- NAD+ is used in respiration. It combines with 2 high energy electrons and proton to form NADH, which is very high energy molecule.

3. Photosynthesis

Explanation- NADP+ is used in respiration. It combines with 2 high energy electrons and proton to form NADPH, which is very high energy molecule. Energy of NADPH is utilized to form glucose in photosynthesis.

4. Both photosynthesis and respiration

Explanation- Both processes involve active transport of protons across membrane. Proton pumps are used in both processes.

5. Photosynthesis

Explanation - Oxygen is released as waste 9by-product) in process of photosynthesis. in presence of sunlight, plants convert carbon dioxide and water into carbohydrates and oxygen. Carbohydrates produced are the food for the plant, while oxygen is a by-product.

6. Respiration

Explanation- Carbon dioxide is a waste (by-product) of the process of respiration. in aerobic respiration, each molecule of glucose, in presence of oxygen produces upto 30 molecules of ATP (used as source of energy), molecules of water and 6 molecules of carbon dioxide (released as by-product)

7. Photosynthesis

Explanation- In photosynthesis carbon dioxide acts as a reagent. Absorbed light energy by chlorophyll is used to convert carbon dioxide and water into glucose.

8. Photosynthesis

Explanation- In the process called photolysis, water molecule is splitted with light into electrons, hydrogen ions and oxygen. Thus water is used as electron donor in oxygenic photosynthesis.

9. Photosynthesis.

Explanation- Organic acids are products of photosynthesis

10. Photosynthesis

Explanation- In photosynthesis proton flow through ATP synthase is involved, whereas, in respiration, ATP synthase combines ADP and phosphate to form ATP.

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