Photosynthesis

Photosynthesis

Which of the following is a product of photosynthesis?

A. WaterB. GlucoseC. Carbon DioxideD. Sunlight

Wate

r

Glucose

Carbon Dioxid

e

Sunlight

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In addition to sunlight, what are the other reactants for the process of photosynthesis?

A. Water and oxygen

B. Water and glucose

C. Oxygen and carbon dioxide

D. Water and carbon dioxide

Wate

r and oxy

gen

Wate

r and gluco

se

Oxyge

n and ca

rbon dioxid

e

Wate

r and ca

rbon dioxid

e

0% 0%0%0%

Pigments of Photosynthesis

Pigments are molecules that absorb specific wavelengths (energies) of light and reflect all others.

Chlorophyll is the main pigment in charge of capturing the energy from sunlight.

•Chlorophyll a absorbs …………….. light best.•Chlorophyll b absorbs ……………. light best.

•Why do plants look green?•THEY RELFECT GREEN LIGHT!!!

Chloroplast Structure

Chlorophyll is a pigment in the chloroplast that

A. stores and releases energy

B. absorbs sunlight

C. Carries high energy electrons

D. Makes glucosesto

res and re

leases e

nergy

absorb

s sunlig

ht

Carries h

igh energy elect.

..

Makes g

lucose

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Chloroplasts do not contain which of the following structures?

A. MitochondriaB. ThylakoidsC. StromaD. Chlorophyll

Mito

chondria

Thylakoids

Stroma

Chlorophyll

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What is the process in which autotrophs trap the energy from the sun and store this energy in molecules such as glucose.

A. PredationB. MetabolismC. Cell RespirationD. Photosynthesis

Predation

Meta

bolism

Cell Resp

iration

Photosy

nthesis

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H2O

1.Write down 3 observations of the diagram below.2. Share with a partner.3. Share with the class! Discuss!!

Remember ATP??

ATP Adenosine triphosphate 3 phosphate groups

ADP Adenosine diphosphate 2 phosphate groups

Compound that cells use to store and release energy

Chemical Energy and ATP

Electron Carrier Molecule

Electron Carrier Molecules Compound that can accept a pair of high energy

electrons and transfer them, along with most of their energy to another molecule

One way the sunlight can be trapped in a chemical form and use it to build glucose for the plant cell

Example: NADP+ = accepts and holds 2 high energy electrons

along with a hydrogen ion (H+) When NADP+ accepts 2 electrons and a H+ it

becomes NADPH

Photosynthesis: Step 1 – Light-Dependent Reaction

Takes place in Thylakoids. Chlorophyll absorbs light energy from the sun. Water is then split into hydrogen (H) and oxygen (O). The oxygen is released to the atmosphere. Produces NADPH and ATP for the Calvin Cycle (step 2)!

H2O

INSunlightWater ADPNADP+

OUTOxygenATPNADPH

Photosynthesis: Step 2 – Light-Independent

ReactionTakes place in Stroma.

Also called the Calvin Cycle or Dark Reactions.

CO2 (carbon dioxide) combines with hydrogen (H) to form C6H12O6 (glucose).

The NADPH made in the light-dependent reactions provides the Hydrogen for the glucose

The ATP made in light-dependent reactions provides the energy for the Calvin Cycle to occur.

What affects the rate of photosynthesis?

Amount of :- sunlight- CO2

- H2O

- temperatureAll the reactions of photosynthesis are controlled by enzymes. Temperatures above or below the optimum temperature will slow down the chemical reactions.

GET YOUR CLICKERS!

Energy from the sun is collected during the:

A. Light-independent reactions

B. Light-dependent reactions

C. Thylakoid reactions

D. Krebs Cycle

Light-i

ndependent reacti

ons

Light-d

ependent reacti

ons

Thylakoid re

actions

Krebs C

ycle

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Glucose is created during this step of photosynthesis.

A. Light-independent reaction

B. Light-dependent reaction

C. Thylakoid reactions

D. Krebs Cycle Li

ght-independent r

eaction

Light-d

ependent reacti

on

Thylakoid re

actions

Krebs C

ycle

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Which of the following would not directly impact the growth of a plant?

A. Spectrum of light

B. Concentration of oxygen

C. Concentration of carbon dioxide

D. Availability of water

E. TemperatureSpectr

um of ligh

t

Concentra

tion of oxyg

en

Concentra

tion of carb

on ...

Availa

bility o

f wate

r

Temperature

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Which of the following is NOT produced in the light-dependent reactions?

1. NADPH2. Sugars3. Hydrogen Ions4. ATP

NADPH

Sugars

Hydroge

n Ions

ATP

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