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How many thylakoids are in a chloroplast?
A granum (plural grana) is a stack of thylakoid discs. Chloroplasts can have from 10 to 100 grana. Grana are connected by stroma thylakoids, also called intergranal thylakoids or lamellae.
What three things do the thylakoids utilize from the atmosphere?
Role of the Thylakoid in Photosynthesis. Reactions performed in the thylakoid include water photolysis, the electron transport chain, and ATP synthesis.
What happens in the thylakoid lumen?
Lumen. The thylakoid lumen is a continuous aqueous phase enclosed by the thylakoid membrane. It plays an important role for photophosphorylation during photosynthesis. During the light-dependent reaction, protons are pumped across the thylakoid membrane into the lumen making it acidic down to pH 4.
What process takes place in the thylakoid membrane?
Photosynthesis takes place in two stages: light dependent reactions and the Calvin cycle. Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2.
What does the thylakoid membrane enclosed?
Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. In thylakoid membranes, chlorophyll pigments are found in packets called quantasomes. Each quantasome contains 230 to 250 chlorophyll molecules.
What do thylakoids produce?
Key Terms
| Term | Meaning |
|---|---|
| Chloroplast | The plant cell structure where photosynthesis occurs |
| Thylakoids | Disc-like structures within a chloroplast that help absorb light |
| Grana | Stacks of thylakoids in a chloroplast |
| Chlorophyll | A pigment found in the thylakoid that absorbs light energy and uses it to produce carbohydrates |
What does thylakoid mean in science?
photosynthesis
Definition of thylakoid : any of the membranous disks of lamellae within plant chloroplasts that are composed of protein and lipid and are the sites of the photochemical reactions of photosynthesis.
What are the 2 waste products of photosynthesis?
Plants need to excrete excess carbon dioxide and oxygen. Carbon dioxide is a waste product of aerobic respiration in plant cells. Oxygen is a waste product of photosynthesis .
Which statement best describes what a thylakoid does during photosynthesis?
Which statement best describes what a thylakoid does during photosynthesis. A thylakoid is a membrane-bound compartment inside chloroplasts and cyanobacteria which is the site of the light-dependent reactions of photosynthesis.
What do the proteins in thylakoids do?
Role of the Thylakoid in Photosynthesis. The lumen of the thylakoid contains proteins used for protein processing, photosynthesis, metabolism, redox reactions, and defense. The protein plastocyanin is an electron transport protein that transports electrons from the cytochrome proteins to Photosystem I .
What is the function of the thylakoid membrane?
The function of a thylakoid is to serve as the compartment where the light-gathering reactions of photosynthesis occur, as explained in “Molecular Biology of the Cell.”. It is located in the stroma of the choloroplast, which is the space found between the inner membrane and the thylakoid membrane.
What is an example of a thylakoid?
The thylakoid lipid bilayer shares characteristic features with prokaryotic membranes and the inner chloroplast membrane. For example, acidic lipids can be found in thylakoid membranes, cyanobacteria and other photosynthetic bacteria and are involved in the functional integrity of the photosystems.