Light Reactions of Photosynthesis

Through the use of oxygen-18 (heavy oxygen), scientists have found that the oxygen released during photosynthesis comes from molecules of:

Which one of the following categories of organisms do not evolve oxygen during photosynthesis?

Hill reaction occurs in

When the number of molecules decomposed is less than one per photon, the reaction has how much quantum yield.

Quantum yield can be measured by expressing the _____ rate.

Quantum yield is a very important parameter of the dark reactions of photosynthesis.

Excitation of chlorophyll by light is

Explain the need of quantum yield in photosynthesis.

Non-cyclic photophosphorylation does NOT occur in _______.

Proton motive force is created by pumping protons across the

In green leaves, the light and dark reactions occur in

The enzymes required for synthesis of ATP are located on _____.

Which of the following is/are the product$\left(\mathrm{s}\right)$ of cyclic photophosphorylation$?$

In cyclic photophosphorylation, the electron is returned back to the reaction centre $P_{680}$ after passing through the elctron transport system.

The graph below represents the absorption spectrum of a major pigment contributing to photosynthesis.

Which one of the following best represents the photosynthetic efficiency of the pigment?

In cyclic photophosphorylation, electron passes from primary electron acceptor to

Photophosphorylation is the process of utilising light energy from photosynthesis to convert

First reaction in electron transport of Photosynthesis

Identify the wrong statements with respect to $\mathrm{ATP}$ synthesis in Chloroplast based on Chemiosmotic hypothesis

A) Proton gradient across the thylakoid membrane increases due to Quinone cycle
B) The movement of protons through ${\mathrm{F}}_0$ leads to decreased $\mathrm{pH}$ in stroma of Chloroplast
C) Breakdown of proton gradient is a cause for release of energy
D) Splitting of water molecules produce protons in stroma of chloroplasts

The ratio of $\mathrm{NADP},$ ${\mathrm{H}}_2\mathrm{O}$ and electrons required to evolve $4{\mathrm{O}}_2$ molecules through photophosphorylation are