0
Photosynthesis occurs in 2 parts- The light reactions and the Calvin Cycle. The light cycle is dependent on light. Within the chloroplast, are sacs of organelles called thylakoids. (A stacked bundle of these are called Granum.) The Thylakoids membranes contain chlorophyll. The chlorophyll is a pigment that absorbs the light from the sun.now for the steps of the light reactions. 1.)The light absorbed by chlorophyll causes a transfer of electrons and H+ from H20 molecules already present. This causes the H20 to split into molecular 0xygen (02) and a H+ ion. 2.) The O2 is released (we breathe it) and the H+ bonds to NADP+ creating NADPH 3.)ATP is formed through photophosphorylation. (ADP gets a phosphate group added to it creating ATP) 4.) The NADPH and the ATP created here go on to fuel the reactions in the second part of photosynthesis - The Calvin Cycle
- Absorption of light by chlorophyll molecules.
- Water splitting to release oxygen, electrons, and protons.
- Electron transport chain to generate ATP and NADPH.
- Reduction of NADP+ to NADPH.
- ATP and NADPH used in the Calvin cycle to produce glucose.
- Regeneration of ADP and NADP+ for reuse in the light reactions.
- Release of oxygen as a byproduct of water splitting.
Add your answer:
Earn +20 pts
What are the two steps in photosynthisis?
The two steps in photosynthesis are the light-dependent reactions, which occur in the thylakoid membranes and require light to produce ATP and NADPH, and the light-independent reactions (Calvin cycle) that occur in the stroma and use ATP and NADPH to convert CO2 into sugar.
What is light independent reaction?
The light-independent reactions, also known as the Calvin cycle, occur in the stroma of chloroplasts and involve the conversion of carbon dioxide into glucose through a series of enzyme-controlled steps. These reactions do not directly require light to occur but rely on the products of the light-dependent reactions, such as ATP and NADPH, for their energy source.
Why are the reactions of the calvin cycle also called the light independent reaction?
Well, darling, they call it the light-independent reaction because unlike photosynthesis where light is needed, the Calvin Cycle doesn't give a damn about the sun. It's all about using that stored up energy from the light-dependent reactions to fix carbon dioxide and make some sugar. So, in a nutshell, it's like saying, "I don't need no stinkin' light to do my job!"
Normally reactions that depend on enzymes are strongly temperature-dependent. Are the carbon-assimilating steps dependent on enzymes?
Yes, carbon-assimilating steps in photosynthesis, such as the Calvin cycle, are indeed dependent on enzymes. These enzymes facilitate the conversion of carbon dioxide into organic molecules, such as glucose, in a series of biochemical reactions. Changes in temperature can affect the activity of these enzymes and consequently impact the overall rate of photosynthesis.
Where do 'dark reactions' take place?
Dark reactions, also known as the Calvin cycle, take place in the stroma of chloroplasts in plant cells. These reactions use the products of the light-dependent reactions to convert carbon dioxide into glucose through a series of enzyme-catalyzed steps.
What are two phrases in photosynthesis?
There are two steps. Light dependent and light independant reactions
Photosynthesis occurs in two steps which are?
Photosynthesis occurs in two main steps: light-dependent reactions and light-independent reactions (Calvin cycle). In the light-dependent reactions, light energy is used to split water and produce ATP and NADPH. In the light-independent reactions, ATP and NADPH are used to convert carbon dioxide into glucose.
What are the two steps in photosynthisis?
The two steps in photosynthesis are the light-dependent reactions, which occur in the thylakoid membranes and require light to produce ATP and NADPH, and the light-independent reactions (Calvin cycle) that occur in the stroma and use ATP and NADPH to convert CO2 into sugar.
Why are the reactions of the calvin cycle also called the light independent reaction?
Well, darling, they call it the light-independent reaction because unlike photosynthesis where light is needed, the Calvin Cycle doesn't give a damn about the sun. It's all about using that stored up energy from the light-dependent reactions to fix carbon dioxide and make some sugar. So, in a nutshell, it's like saying, "I don't need no stinkin' light to do my job!"
What is light independent reaction?
The light-independent reactions, also known as the Calvin cycle, occur in the stroma of chloroplasts and involve the conversion of carbon dioxide into glucose through a series of enzyme-controlled steps. These reactions do not directly require light to occur but rely on the products of the light-dependent reactions, such as ATP and NADPH, for their energy source.
What are the steps that happen in photosynthesis?
Ther are two steps. Those are light dependent andcalvin cycle.
What are the main steps of photosinthsis?
The main steps of photosynthesis are light reactions and Calvin cycle. In the light reactions, light energy is absorbed by chlorophyll and converted into chemical energy (ATP and NADPH). In the Calvin cycle, carbon dioxide is fixed and converted into glucose using the ATP and NADPH produced in the light reactions.
What are the steps in light-dependent reaction?
Oxygen turns into six part carbon sugars
What conditions must be present for light-independent reactions to occur?
Light-independent reactions, also known as the Calvin cycle, require the presence of carbon dioxide, ATP, and NADPH produced during the light-dependent reactions. These reactions take place in the stroma of chloroplasts and are essential for converting carbon dioxide into glucose through a series of enzyme-catalyzed steps.
Normally reactions that depend on enzymes are strongly temperature-dependent. Are the carbon-assimilating steps dependent on enzymes?
Yes, carbon-assimilating steps in photosynthesis, such as the Calvin cycle, are indeed dependent on enzymes. These enzymes facilitate the conversion of carbon dioxide into organic molecules, such as glucose, in a series of biochemical reactions. Changes in temperature can affect the activity of these enzymes and consequently impact the overall rate of photosynthesis.
Where do 'dark reactions' take place?
Dark reactions, also known as the Calvin cycle, take place in the stroma of chloroplasts in plant cells. These reactions use the products of the light-dependent reactions to convert carbon dioxide into glucose through a series of enzyme-catalyzed steps.
What are the two different reaction of photosynthesis and explain each reaction?
Light-dependent reactions: These reactions occur in the thylakoid membranes of chloroplasts and involve the absorption of light to split water molecules, releasing oxygen as a byproduct, and generating ATP and NADPH, which are used in the Calvin cycle. Calvin cycle (light-independent reactions): These reactions take place in the stroma of chloroplasts and involve the fixation of carbon dioxide into a 3-carbon compound (3-phosphoglycerate) using ATP and NADPH generated from the light-dependent reactions. Through a series of enzymatic steps, the 3-carbon compound is eventually converted into glucose and other organic molecules.
