There are two main stages of photosynthesis:
the light-dependent reactions and the Calvin cycle
What is the first phase of photosynthesis?
Photosynthesis occurs in two stages. In the first stage,
light-dependent reactions or light reactions capture the energy of light
and use it to make the energy-storage molecules ATP and NADPH. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.
What are the 4 phases of photosynthesis?
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 CO
2
into carbohydrates (carbon fixation)
.
What are the 5 stages of photosynthesis?
- 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 2 stages of photosynthesis and where do they occur?
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 CO
2
.
What is photosynthesis formula?
The process of photosynthesis is commonly written as:
6CO
2
+ 6H
2
O → C
6
H
12
O
6
+ 6O
2
. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
Which step in photosynthesis does not need light?
The light-independent stage, also known as the Calvin Cycle
, takes place in the stroma, the space between the thylakoid membranes and the chloroplast membranes, and does not require light, hence the name light-independent reaction.
What happened in Stage 1 of photosynthesis?
The first stage of photosynthesis
captures and transfers energy
. The light-dependent reactions include groups of molecules called photosystems. Photosystem II captures and transfers energy.
What is Stage 2 of photosynthesis called?
Carbon atoms end up in you, and in other life forms, thanks to the second stage of photosynthesis, known as
the Calvin cycle (or the light-independent reactions)
.
What happens in Stage 1 of photosynthesis?
Stages of Photosynthesis
Stage I is called the light reactions. This stage
uses water and changes light energy from the sun into chemical energy stored in ATP and NADPH
(another energy-carrying molecule). This stage also releases oxygen as a waste product.
What are the two main reactions of photosynthesis?
Plant cell
The reactions that make up the process of photosynthesis can be divided into light-dependent reactions, which take place in the thylakoids, and
light-independent reactions (also known as dark reactions or the Calvin cycle)
, which take place in the stroma.
How do plants produce ATP?
Plants, through
the process of photosynthesis
, make use of the sunlight to energise and generate glucose through the available water and carbon dioxide. Through cellular respiration, pyruvate in turn gives ATP (adenosine triphosphate). …
Do plants make all their ATP by photosynthesis?
Terms in this set (15)
Unlike animals, which make many ATP by aerobic respiration,
plants make all of their ATP by photosynthesis
.
Where does the first stage of photosynthesis occur?
The first step of photosynthesis occurs in
the chloroplasts of plant cells
. Light photons are absorbed by a pigment called chlorophyll, which is abundant in the thylakoid membrane of each chloroplast. Chlorophyll appears green to the eye because it does not absorb green waves on the light spectrum.
What is dark phase of photosynthesis?
The dark stage of photosynthesis is
an intricate process where NADPH and ATP are used to produce carbohydrate molecules (or sugars)
. Unlike the light phase, it can happen in light or darkness.
What affects the rate of photosynthesis the least?
Photosynthesis increases if the amount of oxygen is decreased. A high level of oxygen is a limiting factor. A
plant deficient in chlorophyll will absorb less light
, which will lower the rate of photosynthesis.
