Photosynthesis in higher plants practice · Mixed difficulty

I. It is the characteristic of ${C_4} -$ plants II. It is the characteristic of ${C_3} -$ -plants III. It occurs in chloroplast IV. It occurs in day time V. It occurs in night Select the correct options in relation to photorespiration Correct option Incorrect option

The following (I-IV) are the main steps of chemosynthetic ATP synthesis in the light reaction. Arrange them in correct order
I.${H^ + }$ concentration gradient established
II. ${H^ + }$ diffuses through ATP synthetase
III. Carriers use energy from electrons to move ${H^ + }$ across the membrane
IV. Electrons from PS-II pass along electron transport chain
V. Light excites electrons in PS-II
VI. Energy of ${H^ + }$ flow is used by ATP synthetase to make ATP

What is the effect of high $C{O_2}$ concentration and higher values of ATP/ADP ratio?

Assertion : Photorespiration decreases the
rate of photosynthesis.

Reason : Rate of respiration in ${C_3}$
and ${C_4}$
is
same.

Kranz anatomy is typical of?

Phenomenon which converts light energy into chemical energy is

I. Water is oxidised in PS-I not in PS-II II. Light is needed for both PS-I and PS-II III. Due to photolysis of water, formation of ATP and NADPH occurs IV. Production of NADPH and $H^+$ is associated with PS-II not PS-I Identify the true statement and select the correct option

Bundle sheath cells are rich in which enzyme

The pigment that appear blue green in the chromatogram is

Which of the following statement is false in case of (${C_4} -$ plant)?

In an experiment, a leaf was partially covered with black paper, and other one was exposed to light. On testing these leaves for starch, in the presence of sunlight, on may conclude that photosynthesis had occurred in

Stroma lamellae membrane lacks
I. PS-II
II. NADP reductase
III. non-cyclic photophosphorylation
Select the correct option

Assertion : Cyclic pathway of photosynthesis
first appeared in some eubacterial species.

Reason : Oxygen started accumulating in the
atmosphere after the non-cyclic pathway of
photosynthesis evolved.

Find the odd one w.r.t. ATP synthase.

Except for the following, all of the next is correct regarding xanthophylls and carotenoids in photosynthesis:

The deficiency of which of these elements interrupts photolysis of water during photosynthesis?

A wastage process is

Conditions required for cyclic photophosphorylation

I. Initial $C{O_2}$ acceptor
II. Extent of photorespiration
III. Enzyme catalysing reaction that fixes $C{O_2}$
IV. Presence of Calvin cycle
V. Leaf anatomy
Which one does not differ in a ${C_3}$ and ${C_4} -$ plants?

Substrate for pyruvic kinase is

Which is not correct for ancient plants?

PEPcase catalyse primary carboxylation step in

Absorption spectrum of chlorophyll-a and the action spectrum of photosynthesis is identical because chlorophyll-a

$C{O_2}$ combines with RUBP in the presence of enzyme RUBISCO to form 3-PGA. This process of calvin cycle is included under?

In photosynthesis carbon dioxide is converted to carbohydrates. It is a ...... process.

Plastocyanin contains

To make 100 molecules of glucose, how many molecules of ATP & NADPH are required?

Assertion (A): Under condition of high light intensity and limited ${CO}_ 2$ supply,photorespiration has a useful role in protecting the plants from photooxidative damage.

Reason (R): If enough ${CO}_ 2$ is not available to utilize light energy for carboxylation to proceed, the excess energy may not cause damage to plants.

The photosynthetic pigments viz, erythrolable, chlorolable and cyanolable respectively are :

In ${C_4}$ (sugarcane plant) plant, $14\,C{O_2}$ is fixed in malic acid. Which of the following enzymes is used to fix $C{O_2}$?