The light-dependent reactions convert light energy into chemical energy. The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH . ... Within chloroplasts, chlorophyll is the pigment that absorbs sunlight.
What cycle is photosynthesis dependent on?
Figure: The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
What organisms are dependent on photosynthesis?
An extremely important byproduct of photosynthesis is oxygen, on which most organisms depend. Photosynthesis occurs in green plants, seaweeds, algae, and certain bacteria . These organisms are veritable sugar factories, producing millions of new glucose molecules per second.
What is light-dependent reaction in photosynthesis?
Light-dependent reactions happen in the thylakoid membrane of the chloroplasts and occur in the presence of sunlight. The sunlight is converted to chemical energy during these reactions. • The chlorophyll in the plants absorb sunlight and transfers to the photosystem which are responsible for photosynthesis.
Is photosynthesis dependent on respiration?
Photosynthesis requires the products from respiration , and respiration requires the products from photosynthesis.
What are the 3 stages of photosynthesis?
The three events that occur during the process of photosynthesis are: (i) Absorption of light energy by chlorophyll. (ii) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen . (iii) Reduction of carbon dioxide to carbohydrates.
What are the 3 stages of Calvin cycle?
Reactions of the Calvin cycle
The Calvin cycle reactions can be divided into three main stages: carbon fixation, reduction, and regeneration of the starting molecule .
What are two major products of photosynthesis?
In photosynthesis, water and carbon dioxide are reactants. GA3P and oxygen are products.
How does photosynthesis help humans survive?
Through photosynthesis, humans can again breathe in the oxygen that was produced and survive. ... In a way, they are a cycle — plants help humans breathe by providing us with oxygen, and humans help plants “breathe” by providing them with carbon dioxide.
What are 2 important jobs of photosynthesis?
Photosynthesis converts sunlight into chemical energy in the form of sugar . That sugar is then broken down through cellular respiration to fuel life at the cellular level. We breathe oxygen and exhale carbon dioxide, while plants breathe carbon dioxide and exhale oxygen.
What is needed for light-dependent reaction?
The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH . In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.
What are the two stages of photosynthesis called?
There are two main stages of photosynthesis: the light-dependent reactions and the Calvin cycle . Requires sunlight? Schematic of the light-dependent reactions and Calvin cycle and how they're connected. The light-dependent reactions take place in the thylakoid membrane.
What are light-dependent and independent reactions?
In the light-dependent reactions, energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. In the light-independent reactions, the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide.
Does photosynthesis require oxygen?
By using the energy of sunlight, plants can convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis. As photosynthesis requires sunlight, this process only happens during the day. ... Oxygen is required to do this.
Can photosynthesis happen without cellular respiration?
Photosynthesis and cellular respiration are both part of a mutually beneficial relationship. Cellular respiration cannot occur without photosynthesis , and photosynthesis certainly cannot occur without the help of its partner.
Which occurs in the presence of oxygen?
Cellular respiration that proceeds in the presence of oxygen is called aerobic respiration .
