Why C 4 and C 3 plants are so called?

The glucose formation takes place in the biosynthetic phase (dark reaction) of photosynthesis. In most plants, the primary carbon dioxide acceptor during dark reaction is a 5C compound, RuBP that undergo carboxylation to form two molecules of 3C phosphoglyceric acid (PGA). It is the first stable product, hence it is called C 3 cycle. Such types of plants in which the first stable product is a 3-carbon PGA is called C 3 plants. Certain plants possess a special kind of anatomical structure known as Kranz anatomy. In these plants, a type of dark reaction occurs in which phosphoenol pyruvic acid (PEP) undergoes carboxylation in the presence of an enzyme PEP carboxylase, known as C 4 cycle. The first stable product in this cycle is a four-carbon compound oxaloacetic acid (OAA), Hence. C 4 plants called so.

E M B I B E

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 26

HARD

11th West Bengal Board

IMPORTANT

Earn 100

Mention three differences between light phase and dark phase.

Important Questions on Photosynthesis

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 27

Mention the differences between bacterial photosynthesis and green plant photosynthesis.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 28

Mention three differences between

C_{3}

and

C_{4}

plants.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 29

State the differences between Calvin cycle and Hatch and Slack cycle.

MEDIUM

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 30

Why C₄ and C₃ plants are so called?

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 1

Write about the outline concept of light and dark reaction phases of photosynthesis.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 2

What do you mean by carbon assimilation ? Describe the dark reaction phase of photosynthesis.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 3

What is photon? Give an account of the light reactions (photosystems) in photosynthesis. Write about the outline concept of light and dark reaction phases.

HARD

11th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 11>Chapter 12 - Photosynthesis>EXERCISE>Q 4

Write what you know about the major photosynthetic pigments?