Question

The number of light quanta required for the evolution of one molecule of oxygen is known as
A. Oxygen yield
B. Photosynthetic yield
C. Quantum yield
D. Organic yield

Answer 1

Hint: Light quanta, called photons, are the littlest discrete measures of light.
For light quanta, we utilize the equation of energy of a photon = Planck's constant x frequency.
Since this is the littlest discrete measure of energy, there must be an entire number of amounts of photons. Photons are referred to as energy sources from sunlight.

Complete answer: During the light period of photosynthesis, the development of oxygen happens. The quantity of light quanta required for the development of one atom of oxygen is called quantum yield. It is a unit to gauge the pace of photosynthesis. To deliver one atom of oxygen, eight quanta of light are required.
 The quantum yield of photosynthesis is characterized as the molar proportion between oxygen delivered in photosynthesis (and carbon acclimatized) to photons ingested all the while.
 Oxygen is developed during photosynthetic electron transport when water is part of the oxygen-advancing complex to give protons and electrons to the chloroplast electron chain.
This is called photolysis of water.

So, the correct answer is “Option C”.

Note: 1. The quantity of photons or quanta required by a plant or leaf to deliver one atom of oxygen during photosynthesis is called quantum prerequisite.
2. It has been seen that in the greater part of the cases the quantum prerequisite is 8.
3. The quantity of oxygen atoms advanced by one quantum of light in photosynthesis makes up the quantum yield. The number of light quanta required for the evolution of one molecule of oxygen is known as quantum yield. The factors responsible for affecting quantum yield are Solvent polarity, viscosity, internal charge transfer, and many more.