Admin Table of Contents
- 1 What is the difference between light phase and dark phase?
- 2 What are light and dark reactions in photosynthesis?
- 3 What are the differences between the light dependent reactions light reactions and the light-independent reactions dark reactions )?
- 4 Why are the dark reactions called dark reactions?
- 5 What are the differences between the light-dependent reactions light reactions and the light-independent reactions dark reactions )?
- 6 What are the differences between light and dark reactions?
- 7 What are the products of light and dark reactions?
What is the difference between light phase and dark phase?
-The light-dependent phase or photochemical phase is commonly called a light reaction. -Biosynthetic phase or dark phase….Complete answer:
| Light reaction | Dark reaction |
|---|---|
| It occurs in the thylakoid membranes of grana and stroma lamellae. | It occurs in the stroma of the chloroplast. |
Can light reactions happen in the dark?
Light dependent reactions(taking place in thylakoid discs)of photosynthesis can’t take place in absence of light. This chemical energy is then used by the dark reactions to produce sugars in the stroma of chloroplast.
What are light and dark reactions in photosynthesis?
The light reactions of photosynthesis involve light-driven electron and proton transfers, which occur in the thylakoid membrane, whereas the dark reactions involve the fixation of CO2 into carbohydrate, via the Calvin–Benson cycle, which occurs in the stroma (Figure 3).
What is the link between light reaction and dark reaction?
Answer: Hydrogen acts as a connecting substance between light reaction and dark reaction.
What are the differences between the light dependent reactions light reactions and the light-independent reactions dark 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.
What is the difference between stoma and stroma?
A stoma is a microscopic pore surrounded by two specialized guard cells found in the leaves and stems. Its main function is gaseous exchange. Stroma is the colourless ground substance found in the chloroplast. It is the site of the light independent reactions of photosynthesis.
Why are the dark reactions called dark reactions?
The first requires sunlight and the second does not. The Calvin cycle is also called the dark reactions or light-independent reactions because it is the part that doesn’t need energy from the sun to happen. The cycle uses ATP and NADPH synthesized in the light-dependent reactions to drive its reactions forward.
Why is it called dark reaction?
Therefore the dark reaction in photosynthesis is called so because it don ot directly depend on light energy. Dark reaction of photosynthesis has distinct chemical reactions which help in the transformation of carbon dioxide and other compounds to form glucose.
What are the differences between the light-dependent reactions light reactions and the light-independent reactions dark reactions )?
What is the difference between grana and stroma?
Grana and stroma are two structures of chloroplast. Grana are the stacks of thylakoids where light reaction of photosynthesis takes place. Stroma is the jell-like matrix of the chloroplast, which contains the enzymes for dark reaction of photosynthesis.
What are the differences between light and dark reactions?
The main difference between light and dark reaction is that light reaction is the first stage of photosynthesis, which traps light energy in order to produce ATP and NADPH whereas dark reaction is the second stage of photosynthesis, which produces glucose by using the energy form ATP and NADPH produced from the light reaction.
What are the reactants and products of dark reaction?
The dark reactions of photosynthesis produce sugar phosphate molecules with three carbon atoms each. These reactions, known as the Calvin cycle, are called dark reactions because they do not use light energy directly, but they still depend on the energy captured from light and only occur during the day.
What are the products of light and dark reactions?
The primary products of photosynthesis, those of the light reaction, are ATP and NADPH. The combination of these primary products into longer-term chemical energy stores primarily is into sugars but also, ultimately, polysaccharides and fats. The dark reaction also consumes carbon dioxide and water.
What is the reactant in dark reaction?
Dark reaction is also called carbon-fixing reaction. It is a light-independent process in which sugar molecules are formed from the carbon dioxide and water molecules . The dark reaction occurs in the stroma of the chloroplast, where they utilize the products of the light reaction.