Photosynthesis in higher plants practice · Medium

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

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

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.

Substrate for pyruvic kinase is

Which is not correct for ancient plants?

PEPcase catalyse primary carboxylation step in

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.

Which of these ensures that the RUBISCO functions as a carboxylase minimising the oxygenase activity at the site of ${O_2}$ fixation in ${C_4}$ plants?

Cyclic phosphorylation occurs at which wavelength

Consider the following statements.
I. The portion of the spectrum between 300-500 nm is also referred to as Photosynthetically Active Radiation (PAR).
II. Magnesium, calcium and chloride ions play prominent roles in the photolysis of water.
III. In cyclic photophosphorylation, oxygen is not released (as there is no photolysis of water) and NADPH is also not produced.

Photorespiration is favoured by

Kranz anatomy pertains to

Using a prism, a scientist splitted light into its spectral components and then illuminated a green alga, Cladophora. In the above statement the scientist who performed the above experiment was

The primary $C{O_2}$ acceptor molecule in ${C_3}$ cycle is a

Assertion : Rate of photosynthesis is
dependent of duration of exposure of light.

Reason : At higher light intensities gradually
rate of photosynthesis do not show further
increase.

Which of the following statements are correct?
I. Light reaction occurs in stroma
II. Light reaction occurs in grana
III. Dark reaction occurs in stroma
IV. Dark reaction occurs in grana
Choose the correct option

Assertion : Under conditions of high light
intensity and limited $C{O_2}$
supply,
photorespiration has a useful role in protecting
the plants from photo-oxidative damage.

Reason : If enough $C{O_2}$
is not available to utilize
light energy for carboxylation to proceed, the
excess energy may not cause damage to plants.

Site of photosynthesis in ${C_4}$ plant is

In PS – II, first known ${\mathrm{e}^ - }$ acceptor

What happen to the chloroplast pigment when they absorb light?

The primary $C{O_2}$ accepter in ${C_4}$ plants in mesophyll cells are

In an experiment, chloroplasts were made acidic by soaking them in acidic solution. What will happen if this chloroplast is transferred to a solution having basic pH?

Within the chloroplast, there is the membranous system consisting of
I. grana
II. stroma lamellae
III. fluid stroma
Choose the correct option

I. The electrons that carriers photophosphorylation are located in the thylakoid membrane
II. During photophosphorylation, the chloroplast stroma becomes more acidic than the interior of thylakoid membrane
III. Protons diffuses through the protein channels which are ATP synthetase molecules
IV. ATP is formed from ADP + Pi on the stroma side of the thylakoid in the chloroplast
V. During photophosphorylation, water ionises to form ${H^ + }$, yielding electrons to PS-II
Which of the following statement are false?

In ${C_3}$-plants, the first stable compound formed after carbon dioxide fixation is

The movement of electrons in ETC in light reaction is?