sim photosynthesis
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Least Mastered Learning CompetencyCompare the light and dark reactions in photosynthesis.
STRATEGIC INTERVENTION MATERIAL
IN SCIENCE AND TECHNOLOGY II
Where’s my Food?
Guide card What is photosynthesis?
Students NoteAfter reading this page I still do not understand Now I understand what the
lesson is all about.What I think about the things to
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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. The light reaction that took place in the grana of the chloroplast and the dark reaction that took place in he stroma of 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 tosplit and add
2H
That is releasedThat are trapped byNADP (H acceptor)
forming
For use in the dark reaction
p
to
( energy carrier)
forming
That stores energy
Word boxfor activity card 2
Water OxygenNADPH2 WaterChlorophyll
Activity card 3THE DARK REACTION
The fixing of carbon in a carbohydrate
Combines with
A five carbon sugar in the chloroplast ( CO2 acceptor)
To form
A very unstable
That splits quickly and forms
PGA, a 3-carbon compound
that combines with
2H supplied by NADPH2 from the light reaction ( energy supplied by conversion of ATP to ADP )
and forms
H2O that is releasedAs a by- product
That can be usedAs nutrient or converted to
andRDP
That is gain usedTo combine with CO2
by combining and substitutingH for a phosphate
Word Boxfor Activity Card 3
PGAL 6 carbon sugarADP 2 moleculesGlucose Carbon dioxide
Check it out!Study the following illustrations below.
Differentiate each stage of photosynthesis.
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 1Students Note
Assessment Card 2.Self-check
Encircle the letter of the correct answer
1. Which of the following reactions is also known as photo phase?a. Light dependent b. Light independent c. Anaphase
2. 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
7. 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 noteWhat 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 IIInternet Explorer
Answer card
Activity No. 11. ATP2. oxygen3. electron4. water5. chlorophyll
Activity No. 2ChlorophyllWaterOxygenNADPH2
ATP
Activity No. 3CO2
6 carbon sugarPGALGlucoseADP
Assessment No. 1A. Dark reaction or light
–independent reaction
B. Light reaction or light- dependent reaction
Assessment No. 2.1. A 6. A
2. B 7. A3. A 8. B4. C 9. A5. B 10. B
Enrichment Card1. Photosynthesis2. Light3. ATP4. Dark5. Glucose