Light and Dark Reaction

Q.

What is the difference between light and dark reactions?

Q. Light dependent reaction occurs in the ___ of the chloroplast.

1. stroma
2. grana
3. inner membrane
4. outer membrane

Q. How can the enzymes lower the activation energy required for a reaction ?

Q. Refer to the image and identify the site for light and dark reaction respectively.

1. A - Light Reaction, C - Dark reaction
2. D - Light Reaction, B - Dark reaction
3. D - Light Reaction, C - Dark reaction
4. D - Light Reaction, A - Dark reaction

Q. Select the event(s) which occur during light dependent reaction.

1. Water is decomposed into hydroxyl and hydrogen ions.
2. Light energy is converted into chemical energy.
3. Oxygen is given out during this process.
4. Carbon di oxide is reduced to starch.

Q. CO₂ is reduced into starch by utilising energy produced during light reaction.

1. True
2. False

Q. During a class lecture students were taught about the process of photosynthesis which occurs in the chloroplast. They were told that there are two phases of photosynthesis i.e. light reaction and dark reaction.
Select the correct statements with respect to light reaction.

1. Light energy is converted into chemical energy and stored in the form of ATP.
2. CO₂ is reduced to starch, utilising the energy released during this process.
3. It occurs in the grana of chloroplast in the presence of sunlight.
4. Water is decomposed into its basic constituents i.e hydrogen and hydroxyl ion.

Q. The chemical energy released due to oxidation of food materials is trapped in the form of ATP.

1. False

2. True

Q. Dark reactions do not occur during the day.

1. False
2. True