HARD
Earn 100

Describe C4 pathway with examples. 

Important Questions on Photosynthesis in Higher Plants

MEDIUM
In the maize plant, CO2 fixation occurs in both mesophyll and bundle sheath cells. The enzymes involved in these cells for the process respectively are
MEDIUM
Number of given forms of phosphate ions released during the synthesis of 10 glucose molecules in calvin cycle in series
a) Inorganic phosphate
b)H2PO4-
c) ADP
MEDIUM
Two independent experiments related to photosynthesis were conducted, one with O18-labelled water (experiment P) and the other C14-labelled CO2 (experiment Q). Which one of the following options lists the first labelled products in experiments P and Q, respectively?
MEDIUM
The enzyme that is not found is C3 plants is:
EASY
The two enzymatic activities associated with RuBisCO are:
EASY
The glycolytic reversal involves following steps of Calvin cycle ________.
HARD

Series of enzymes involved in the given reactions of C3 cycle

(i) A6c+B3cC4c+D5c

(ii) C4c+E3cF7c

(iii) D5cG5c

(iv) G5c+ATPH5c

MEDIUM

Identify the differences between C3 and C4 plants among the following characters

A) Photorespiration rate
B) Activity of RuBisCO
C) Type of light reactions
D) CO2 primary acceptor from atmosphere
E) Anatomy of the leaf

MEDIUM
Which of the following statements is incorrect?
EASY
The first stable compound formed in C4  plants
HARD
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
MEDIUM
Assertion (A): Relative concentration of Oand CO2 determines which of the two will bind to RuBisCO.
Reason (R): RuBisCO has a much greater affinity for CO2 than for O2.
The correct option among the following is:
MEDIUM

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.

EASY
Identify the correct sequence of stages of Calvin cycle?
HARD

To avoid photorespiration, which anatomical peculiarities are shown by C4 plants?

EASY
Identify the reaction for which the C4 plants require some extra ATP molecules in comparson to C3 plants.
MEDIUM
Consider the following statements regarding photosynthesis and respiration in plants and select the correct option.
I. RuBisCO has high affinity to oxygen in low CO2 concentration.
II. The Calvin pathway occurs in the chloroplast of bundle sheath cells of C4 plants.
III. Yeast position themselves when the concentration of alcohol reaches 7%.
IV. Oxygen is a final hydrogen acceptor during aerobic respiration.
MEDIUM
If  14CO2 is added to a suspension of photosynthesizing chloroplasts, which of the following will be the first compound to be radioactive?
HARD
Identify and explain with the help of diagrammatic representation, type of photophosphorylation P700 (PS I) and P680 (PS II) both are involved.