CHLOROPLAST

Question 1

What types of the plastid are chloroplast and what are the pigment they contain ?

Answer 1

1. They are photosynthetic plastid

2. pigment - Chlorophyll and carotenoid

Question 2

What is the shape and size of the chloroplast ?

Answer 2

1. SHAPE - Higher plants = Round , oval , lens
   - Lower plants = Various shaped - spiral\ribbon like in spirogyra and cup shaped in Chlamydomonas.
2. SIZE - Length = 5-10 um
   - Width = 2-4 um

Question 3

What is no. of chloroplast in hesophyll cells and Chlamydomonas ?

Answer 3

Hesophyll = 20- 40 chloroplast \ cell
Chlamydomonas = 1 chloroplast \ cell

Question 4

LEARN THE DIAGRAM OF CHLOROPLAST

Answer 4

DONE :D

Question 5

What are the two types of the reaction that takes place ion the chloroplast ?

Answer 5

1. Dark reaction

2. Light reaction

Question 6

What is light reaction ?

Answer 6

In this

1. In grana light energy in the presence of the pigments is being converted into the chemical energy.
2. Product of this reaction are ATP & NADPH

Question 7

What is the dark reaction and what is the Calvin cycle?

Answer 7

In this

1. It occurs in stroma
2. It is the light independent reaction
3. Here CO2 through reduction by ATP & NADPH is converted into glucose.
4. the above process is known as Calvin cycle

Question 8

What is the marker enzyme of the dark reaction ?

Answer 8

Rubisco (Ribulose bisphosphate carboxylase oxygenate)

Question 9

Give some features of the rubisco ?

Answer 9

1. World’s slowest enzyme
2. Turn over rate is 1-2mol of CO2 to glucose \ sec
3. Most abundant proteins.

Question 10

What are pyrenoids ?

Answer 10

In algae , central core of the protein surrounded by starch sheath CO2 fixation.