Table of Contents
- 1 What are the different stages of thylakoid reaction?
- 2 What are the 4 reactants going into the light-dependent reactions?
- 3 What are the 5 major steps involved in photosynthesis?
- 4 What are the stages of photosynthesis which stage occurs first?
- 5 What are the steps in light-dependent reactions?
- 6 What are the steps involved in light independent reaction of photosynthesis?
- 7 What reactions occur in thylakoid membranes?
- 8 What are thylakoids and their function in photosynthesis?
- 9 Where are the protein complexes located in the thylakoid membrane?
- 10 How are the thylakoid membranes of cyanobacteria differentiated?
What are the different stages of thylakoid reaction?
It is convenient to divide the photosynthetic process in plants into four stages, each occurring in a defined area of the chloroplast: (1) absorption of light, (2) electron transport leading to the reduction of NADP+ to NADPH, (3) generation of ATP, and (4) conversion of CO2 into carbohydrates (carbon fixation).
What are the 4 reactants going into the light-dependent reactions?
The reactants in the light-dependent chemical reaction are adenosine diphosphate (ADP), oxydized nicotinamide adenine dinucleotide phosphate (NADP+) and the hydrogen in water.
What are the thylakoid reactions?
Reactions performed in the thylakoid include water photolysis, the electron transport chain, and ATP synthesis. Photosynthetic pigments (e.g., chlorophyll) are embedded into the thylakoid membrane, making it the site of the light-dependent reactions in photosynthesis.
What are the 5 major steps involved in photosynthesis?
Terms in this set (7)
- Step 1-Light Dependent. CO2 and H2O enter the leaf.
- Step 2- Light Dependent. Light hits the pigment in the membrane of a thylakoid, splitting the H2O into O2.
- Step 3- Light Dependent. The electrons move down to enzymes.
- Step 4-Light Dependent.
- Step 5-Light independent.
- Step 6-Light independent.
- calvin cycle.
What are the stages of photosynthesis which stage occurs first?
Which stage occurs first? The stages of photosynthesis are the light reactions and the Calvin cycle. The light reactions occur first.
What are the stages of light dependent reaction?
These reactions occur within specialised membrane discs within the chloroplast called thylakoids and involve three steps: Excitation of photosystems by light energy. Production of ATP via an electron transport chain. Reduction of NADP+ and the photolysis of water.
What are the steps in light-dependent reactions?
Here are the basic steps:
- 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 are the steps involved in light independent reaction of photosynthesis?
The light-independent reactions of the Calvin cycle can be organized into three basic stages: fixation, reduction, and regeneration.
How many layers are there in the structure of thylakoid?
2 layers are there in the structure of thylakoid.
What reactions occur in thylakoid membranes?
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.
What are thylakoids and their function in photosynthesis?
Thylakoid membranes contain integral membrane proteins which play an important role in light harvesting and the light-dependent reactions of photosynthesis.
How are galactolipids arranged in the thylakoid membrane?
The thylakoid membranes of higher plants are composed primarily of phospholipids and galactolipids that are asymmetrically arranged along and across the membranes. Thylakoid membranes are richer in galactolipids rather than phospholipids; also they predominantly consist of hexagonal phase II forming monogalacotosyl diglyceride lipid.
Where are the protein complexes located in the thylakoid membrane?
There are four major protein complexes in the thylakoid membrane: Photosystem II is located mostly in the grana thylakoids, whereas photosystem I and ATP synthase are mostly located in the stroma thylakoids and the outer layers of grana. The cytochrome b6f complex is distributed evenly throughout thylakoid membranes.
How are the thylakoid membranes of cyanobacteria differentiated?
The thylakoid membranes of the cyanobacteria are not differentiated into granum and stroma regions as observed in plants. They form stacks of parallel sheets close to the cytoplasmic membrane with a low packing density.