Biosynthetic Phases of Photosynthesis

IMPORTANT

Biosynthetic Phases of Photosynthesis: Overview

This Topic covers sub-topics such as C3 Cycle, C4 Cycle, Kranz Anatomy, CAM Pathway, Rubisco, Differences between C3 and C4 Pathway, Carboxylation phase of Calvin Cycle, Reduction Phase of Calvin Cycle and, Regeneration of RuBP during Calvin Cycle

Important Questions on Biosynthetic Phases of Photosynthesis

EASY
IMPORTANT

Select the incorrect statement

MEDIUM
IMPORTANT

In C4 plants, the first carbon dioxide acceptor is

MEDIUM
IMPORTANT

Which of the following is representing the correct set of inputs in the dark reaction - C3 pathway, for the fixation of 1 molecule of CO2?

HARD
IMPORTANT

Read the following statements and select the correct option:

I. In C4 plants, the first stable product is formed in bundle sheath cells

II. In maize plants, the chloroplasts of the mesophyll cells are larger and with abundant starch stored

III. In mango plants, there are two types of cells in the leaves, mesophylls, and bundle sheath, which are involved in the carboxylation process separately.

IV. The productivity of maize is much lower as there is huge loss in photorespiration

MEDIUM
IMPORTANT

One of the common compounds in C4 pathway and the Krebs cycle is:

EASY
IMPORTANT

For yielding one molecule of glucose, Calvin cycle turns

MEDIUM
IMPORTANT

Read the following statements and select the incorrect ones:

I. In plants like maize, Sorghum, the mesophyll cells are equipped with RuBisCO.

II. CO2-compensation point for the C4-plants are very low, as compared to the C3-plants.

III. Primary carboxylation occurs in maize in the bundle sheath cells.

IV. C4-plants keep their stomata closed in the daytime.

EASY
IMPORTANT

Calvin cycle is major biochemical pathway for

MEDIUM
IMPORTANT

Which among the following statements are correct?
(i) The quantum yield of photosynthesis decreases with an increase in temperature in C3 plants, as compared to C4 plants.
(ii) The first stable product in C3 pathway is phosphoglycerate, whereas in the C4 pathway it is oxaloacetate.
(iii) C3 pathway is present only in C3 plants and C4 pathway is present in all plants.

(iv) The rate of photorespiration is very high in C4 plants and very low in C3 plants.

EASY
IMPORTANT

According to Dr. Arnon, a substance present in chloroplast that acts as H-acceptor is _________.

EASY
IMPORTANT

The entire reactions of C4 pathway takes place in

EASY
IMPORTANT

Which of the statements is not true of the C4 pathway

EASY
IMPORTANT

In sugarcane plant CO214 is fixed in malic acid, in which the enzyme that fixes CO2 is

MEDIUM
IMPORTANT

Match the plants in Column I with their features listed in the Column II, III and IV.

Column I: Types of plants Column II: Types of Photosynthesis Column III: Site of Calvin cycle Column IV: Time of stomata
opening
Rice CAM Mesophyll Day
Pineapple C4 Bundle Sheath Night
Sugarcane C3    

Choose the correct combination.

MEDIUM
IMPORTANT

Which of the following statement is not correct, with reference to factors affecting the rate of photosynthesis?

EASY
IMPORTANT

When is acid concentration in CAM plants more?