Question

The first stage of photosynthesis gives off _______ as a waste product. water carbon dioxide oxygen all of the above

Answer 1

The correct answer is oxygen.

Photosynthesis refers to the procedure utilized by plants and other species to transform light energy into chemical energy, which can be later released to fuel the organisms' activities. Photosynthesis takes place in two phases. In the first stage, light-dependent reactions capture the energy of light and utilize it to form the energy-storing molecules that is NADPH and ATP.

In the light-dependent reaction, one molecule of the pigment chlorophyll loses one electron and absorbs one photon. This electron is passed to pheophytin that passes the electron to a quinone molecule, initiating a flow of electrons down an electron transport chain, which results in the ultimate reduction of NADP to NADPH.

In supplementation, this develops an energy gradient across the chloroplast membrane that is used by ATP synthase in the production of ATP. The chlorophyll molecule eventually regains the lost electron when a molecule of water gets split in a process known as photolysis that discharges a molecule of dioxygen as a waste product.

Answer 2

Answer: Oxygen

Step-by-step explanation: There are two stages of photosynthesis, i.e.

1. Light dependent reaction-Here light energy is absorbed and converted into chemical energy. Here, breakdown of water molecules take place, which leads to release of electrons, protons and oxygen molecules.

2. Light independent reaction-Here the chemical energy formed during the former reaction is used to reduce carbon dioxide into glucose.