Table of Contents
- 1 What is present in both the light-dependent and light-independent reactions?
- 2 How are the light-dependent and light-independent reactions related connected How are they different?
- 3 Which of the following is not associated with light-dependent reactions?
- 4 What are the light independent products?
- 5 What are the 4 steps of light reactions?
- 6 What are the three products of the light dependent reactions?
- 7 What are the steps in the light dependent reactions?
What is present in both the light-dependent and light-independent reactions?
Light energy is harnessed in Photosystems I and II, both of which are present in the thylakoid membranes of chloroplasts. In light-independent reactions (the Calvin cycle), carbohydrate molecules are assembled from carbon dioxide using the chemical energy harvested during the light-dependent reactions.
What are 3 characteristics of light-independent reactions?
The light-independent reactions of the Calvin cycle can be organized into three basic stages: fixation, reduction, and regeneration.
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.
Which of the following is associated with the reaction center during light reaction?
chlorophyll
The reaction centre contains pigments such as chlorophyll and phaeophytin. These absorb light, promoting an electron to a higher energy level within the pigment. The free energy created is used to reduce an electron acceptor and is critical for the production of chemical energy during photosynthesis.
Which of the following is not associated with light-dependent reactions?
Bio Lab 2 test
Question | Answer |
---|---|
Which of the following statements about light dependent reactions is NOT true? | The cyclic electron pathway involves PSI and PSII. |
Which of the following is a significant coenzyme involved in photosynthesis? | NADP+ |
The oxygen given off by plants during photosynthesis comes from | H2O (water). |
What are light-dependent reactions fueled by?
In the light-dependent reactions, energy absorbed by sunlight is stored by two types of energy-carrier molecules: ATP and NADPH. The energy that these molecules carry is stored in a bond that holds a single atom to the molecule.
What are the light independent products?
Light reactions harness energy from the sun to produce chemical bonds, ATP, and NADPH. These energy-carrying molecules are made in the stroma where carbon fixation takes place.
Where does light independent reaction occur?
stroma
The light-independent reactions represent the known Calvin–Benson–Bassham (CBB) cycle which takes place in the stroma of chloroplasts and is the primary pathway of carbon fixation of C3 plants [119]. The CBB cycle proceeds in three main stages: carboxylation, reduction and regeneration.
What are the 4 steps of light reactions?
What are the 4 steps of light reactions?
- Light absorption in PSII. When light is absorbed by one of the many pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction center.
- ATP synthesis.
- Light absorption in PSI.
- NADPH formation.
What is formed during the light independent phase of photosynthesis?
In the light-independent reactions or Calvin cycle, the energized electrons from the light-dependent reactions provide the energy to form carbohydrates from carbon dioxide molecules. The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process.
What are the three products of the light dependent reactions?
The reaction products are glucose, ADP and NADP +. The latter two are used again in light-dependent reactions. While the Calvin cycle reactions can take place in the absence of light, they are in fact light dependent in plants and take place during the day.
What are examples of light dependent reactions?
One very good example of Light Dependent Reaction is Photosynthesis and the product of the primary step of Photosynthesis is Oxygen, NADPH and ATP .
What are the steps in the light dependent reactions?
Co2, water, chlorophyll, and sunlight are four important requirements for this process. Photosynthesis occurs in two steps: Light reaction and Dark Reaction. Light Reaction – It is a light dependent reaction. Dark Reaction– It is a light-independent reaction. Learn about Dark Reaction here in more detail.
What are the characteristics of light dependent reactions?
Light reactions of photosynthesis are light dependent reactions. They are light dependent because for the process to start, a light ray should impinge on the chlorophyll and only then the reactions of photosynthesis begin. Dark reactions of photosynthesis are light independent.