Science pt

Question 1

Chlorophyll-containing Photosystem II is hit
by the photons of light.

Answer 1

1st step of LIGHT DEPENDENT
REACTION PROCESS

Question 2

Electrons in the chlorophyll inside
Photosystem II gets excited and move to
Electron Transport Chain.

Answer 2

2nd step of light dependent

Question 3

Electrons lost in the chlorophyll of
Photosystem II is replaced with the help of
the process called “photolysis”. In
photolysis, water is split and its electrons go
to chlorophyll. When water is split,
electrons, hydrogen ions, and oxygen is
produced.

Answer 3

3rd step of light dependent

Question 4

Electron Transport Chain (ETC) transports
electrons. As it does, the energy in electrons
is used to pump hydrogen ions into the
thylakoid creating a high concentration inside
in the thylakoid.

Answer 4

4th step of light dependent

Question 5

When electrons reached the end of the
first ETC, they go to photosystem I where
light excites then once again.

Answer 5

5th step of light dependent

Question 6

They travel down the second ETC where
they finally get accepted by a molecule called
NADP+.

Answer 6

6th step of light dependent

Question 7

When NADP+ accepts electrons, it also
accepts hydrogen forming NADPH.

Answer 7

7th step of light dependent

Question 8

The high concentration of hydrogen ions
inside the thylakoid is passively diffused by
a protein called ATP Synthase. During this
process, ATP synthase converts ADP into
ATP adding one more phosphate group in its
chain.

Answer 8

8th step of light dependent