Sim Photosynthesis

Least Mastered Learning Competency
Compare the light and dark reactions in photosynthesis.
STRATEGIC INTERVENTION MATERIAL
IN SCIENCE AND TECHNOLOGY II

Where’s my Food?

Guide cardWhat is photosynthesis?
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Plants, algae, and other chlorophyll-bearing organisms capture light energy and use it to produce food. This energy is passed on to animals that feed directly on plants or on other animals that have fed on plants. The entire process of capturing light energy to produce food is called photosynthesis. The equation is:
6CO2 + 6H2O + light chlorophyll
(energy)
C6H12O6 + O6

Photosynthesis is two stage process. Thelight reaction that took place in the grana of the chloroplast and the dark reaction that took place in he stromaof the chloroplast.
In the light-dependent process, light strikes chlorophyll in such a way as to excite electrons to a higher energy state. In a series of reactions, the energy is converted (along an electron transport process) into ATP and NADPH. Water is split in the process, releasing oxygen as a by product of the reaction. The ATP and NADPH are used to make C-C bonds in the dark reaction. The photosynthetic process, in which food(sugar) molecules are formed from the carbon dioxide in the atmosphere with the use of ATP can occur in the dark as long as ATP is present.
Remember….

Photosynthetic General Equation

What happens in photosynthesis

Activity card 1
Arrange the jumbled letters to produce a word.
_________ 1. TAP- formed during light reaction.
_________ 2. YGXONE- gas given off by plants.
_________ 3. TRELECON- energized during reaction.
_________ 4. AWTRE- splits into hydrogen and oxygen.
_________ 5. LOPHYOLRCHL- traps light energy.

Activity card 2Study the diagram below and complete it using the words in the box.SUN
Light energy
Is absorbed by
Energy carrier that becomes ENERGIZED CHLOROPHYLL that supplies energy to
split
add
and
p
2H
to
That are trapped by
NADP (H acceptor)
That is released
( energy carrier)
forming
forming
That stores energy
For use in the dark reaction

Word boxfor activity card 2
Water Oxygen
NADPH2 Water
Chlorophyll

Activity card 3
THE DARK REACTION
The fixing of carbon in a carbohydrate
Combines with
A five carbon sugar in the chloroplast ( CO2 acceptor)
That is gain used
To combine with CO2
by combining and substituting
H for a phosphate
To form
A very unstable
and
RDP
That splits quickly and forms
That can be used
As nutrient or converted to
H2O that is released
As a by- product
PGA, a 3-carbon compound
and forms
that combines with
2H supplied by NADPH2 from the light reaction
( energy supplied by conversion of ATP to ADP )

Word Boxfor Activity Card 3
PGAL 6 carbon sugar
ADP 2 molecules
Glucose Carbon dioxide

Check it out!
Study the following illustrations below. Differentiate each stage of photosynthesis.
Assessment Card 1
Students Note
What I already know about this page? ______________________________________
What I learned from this page?
______________________________________
What I still want to know about this page?
______________________________________
What reactions occur?
A
B

Assessment Card 2.Self-checkEncircle the letter of the correct answer
Which of the following reactions is also known as photo phase?
a. Light dependent b. Light independent c. Anaphase
Which of the following reactions is also known as synthesis phase?
a. Light dependent b . Light independent c. Metaphase
3. What kind of energy is used to split two molecules of water?
a. Light b. Proton c. Neutron
4. What is the energy source of the cell?
a. NAD b. ADP c. ATP
5. What is made up of 5-carbon sugar and an important carbon dioxide acceptor?
a. ATP b. RUDP c. PGAL

6. Which co-enzyme capture the hydrogen molecules?
a. NADP b. RUDP c. PGAL
How many carbon, hydrogen, and oxygen are present in a glucose molecule?
a. C6H12O6 b. C5H11O2 c. C12H6O12
8. What are the end product in dark reactions?
a. ATP and NADPH b. sugar c. enzyme
9. In which part of the cell does light reactions take place?
a. thylakoids b. stroma c. stomata
10. In which part of a plant cell does dark reactions take place?
a. thylakoids b. stroma c. stomata

Enrichment Card
Sentence completion…
The ___________ is the conversion of light energy into chemical energy. The light dependent reaction includes the conversion of __________ energy into electron energy, then into short-term energy storage __________. The __________ reaction involves the conversion of short-term energy storage to long term energy storage
___________.
Students note
What I already know about this page? __________________________________________________________
What I learned from this page?
__________________________________________________________
What I still want to know about this page?
__________________________________________________________

Spot the Difference

Reference Card
Dela Cruz, Susana B.
Biology ( Pheonix Next Century)
Agar, Irene C. et.al.
Science and Technology II
Internet Explorer

Answer card
Activity No. 1
1. ATP
2. oxygen
3. electron
4. water
5. chlorophyll
Activity No. 2
Chlorophyll
Water
Oxygen
NADPH2
ATP

Activity No. 3
CO2
6 carbon sugar
PGAL
Glucose
ADP
Assessment No. 1
Dark reaction or light –independent reaction
Light reaction or light- dependent reaction

Assessment No. 2.
1. A 6. A
2. B 7. A
3. A 8. B
4. C 9. A
5. B 10. B
Enrichment Card
1. Photosynthesis
2. Light
3. ATP
4. Dark
5. Glucose

Sim Photosynthesis

by eric on Sep 06, 2010

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