Photosynthesis
One morning, a little girl saw her mother watering a plant in the garden and she asks
Mommy, why do we need to water the plant?
we need to water plant so it can stay alive. same goes to the sunlight,.
plant need sunlight to carry out photosynthesis
photosynthesis ???
Photosynthesis is process carried out by green plant to synthesize glucose from carbon dioxide and water
in the presence of sunlight and chlorophyll
Inside the leaves,there is presence of  chloroplast
Imagine the chloroplast is a big house
Inside the chloroplast,there is grana that looked like a coin shaped staked thylakoid.
This is grana
And one grana called as thylakoid
The fluid that filled inner space of chloroplast known as stroma
During day time,plant undergo light reaction
Light reaction reaction is the first stage of photosynthesis
This reaction need water and light from the sun.
Chlorophyll will absorb light energy from sunlight.
It convert light energy to chemical energy
and produce ATP+NADPH
and release oxygen as a waste product
Later that night....
Mommy,its dark outside and the sunlight is gone.
Do the plant still carry out photosynthesis??
 
hmmmm
Can plant still undergo photosynthesis without sunlight?
YES IT CAN!!
There is second stage of photosynthesis.
The second stage is dark reaction
Which also known as calvin cycle
How do photosynthesis occur at night?
The process is called dark reaction
For your information, dark reaction happened in stroma
Which is also located in a chloroplast
Do you remember the product from light reaction just now?
 
The ATP+NADPH from light reaction
will continue their duty at night with the help of carbon dioxide
in the air
The process during night..
only will produce glucose at the end of process
So guys,that is what happened in photosynthesis process
Now lets differentiate between light and dark reaction
Light reaction required the source of light
dark reaction do not required any light
Light reaction happened in GRANA
dark reaction happened in stroma
light reaction produce ATP+NADPH
however dark reaction use ATP+NADPH to produce glucose
water is used in light reaction
meanwhile in dark reaction..
carbon dioxide is needed
by the end of the process
the light reaction will produce oxygen as end product
In dark reaction the end product is glucose
so i want to ask you guys
Does photosynthesis happen at night ?
YES IT IS !!
Photosynthesis happen both day and night
Remember that guys !
i hope you can understand the concept well
Thats all for today lesson.
GOODLUCK !
