Photosynthesis

Photosynthesis Photosynthesis - Start

2016-06-17 45K 45 0 0

Photosynthesis - Description

Energy . and Life. Plants and some other types of organisms are able to use light energy from the sun to produce food.. Autotrophs. : organisms such as plants, which make their own food. Heterotrophs. ID: 365427 Download Presentation

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Photosynthesis




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Presentations text content in Photosynthesis

Slide1

Photosynthesis

Slide2

Energy and Life

Plants and some other types of organisms are able to use light energy from the sun to produce food.Autotrophs: organisms such as plants, which make their own foodHeterotrophs: obtain energy from the foods they consumeAll living organisms must be able to produce energy from the environment in which they live, store energy for future use, and use energy in a controlled manner.

Slide3

Autotrophs

Slide4

Heterotrophs

Slide5

Chemical Energy and ATP

A quick source of energy that is stored in the chemical bonds of a molecule that can be used quickly and easily by the cell is called adenosine triphosphate (ATP).ATP is an energy moleculeThe energy of ATP becomes available when the molecule is broken down.The addition and release of a phosphate group on adenosine diphosphate creates a cycle of ATP formation and breakdown. This means the cell doesn’t have to store all the ATP it needs.

Slide6

ATP Continued

Cells use this energy to make new cells, maintain homeostasis, and to power functions (like movement).The characteristics of ATP make it exceptionally useful as the basic energy source of all plant cells.

Slide7

Adenine

Ribose

3 Phosphate groups

ATP

Slide8

ADP

ATP

Energy

Energy

Adenosine diphosphate (ADP) + Phosphate

Adenosine triphosphate (ATP)

Partially

chargedbattery

Fullychargedbattery

Comparison of ADP and ATP to a Battery

Slide9

ADP

ATP

Energy

Energy

Adenosine diphosphate (ADP) + Phosphate

Adenosine triphosphate (ATP)

Partially

chargedbattery

Fullychargedbattery

Comparison

of ADP and ATP to a Battery

Slide10

Photosynthesis

Photosynthesis: Plants use energy from the sun to convert water and carbon dioxide into high energy carbohydrates (sugars and starches) and give off oxygen as a waste product.Photosynthesis happens in 2 phases: light-dependent reactions and light-independent reactions.In addition to water and carbon dioxide, photosynthesis requires light and chlorophyll, a molecule in chloroplasts.

Slide11

Photosynthesis Equation

Slide12

Light Energy

Chloroplast

CO

2 + H2O

Sugars + O2

Photosynthesis: Reactants and Products

Slide13

Light and Pigments

Plants gather the sun’s energy with light absorbing molecules called pigments. The plants’ principal pigment is chlorophyll.2 types of chlorophyll: Chlorophyll a and Chlorophyll bChlorophyll absorbs light very well in the blue-violet and red regions of the visible spectrum. However, chlorophyll does not absorb light very well in the green region of the spectrum. Green is reflected by leaves, which is why plants look green.

Slide14

Absorption of Light by

Chlorophyll a and Chlorophyll b

V

B

G

Y

O

R

Chlorophyll b

Chlorophyll a

Chlorophyll

Light Absorption

Slide15

The Reactions of Photosynthesis

Photosynthesis takes place inside the chloroplastsThe Chloroplasts contain saclike photosynthetic membranes called thylakoids, which are arranged in stacks known as grana. The space outside of the grana is called the stroma.Proteins in the thylakoids membrane organize chlorophyll and other pigments into clusters known as photosystems, which are the light collecting units of chloroplasts.

Slide16

Chloroplasts

Slide17

Light-dependent reaction: uses light energy to produce oxygen and convert ADP and NADP+ into energy carriers ATP and NADPHThe light dependent reactions take place within the thylakoid membranes (granum) of chloroplasts.

Light Dependent Reactions

Slide18

Hydrogen

Ion Movement

Photosystem II

InnerThylakoidSpace

ThylakoidMembrane

Stroma

ATP synthase

Electron

Transport Chain

Photosystem I

ATP Formation

Chloroplast

Light-Dependent

Reactions

Slide19

Calvin Cycle

Calvin Cycle: uses the energy carriers ATP and NADPH from the light-dependent reactions to produce high-energy sugars. (Calvin cycle is also called the light independent reaction)Calvin Cycle takes place in the stroma, outside the grana.

Slide20

ChloropIast

CO

2

Enters the Cycle

Energy Input

5-CarbonMoleculesRegenerated

Sugars and other compounds

6-Carbon SugarProduced

Calvin

Cycle

Slide21

Factors Affecting Photosynthesis

Water, light, and temperature all affect photosynthesis

Slide22

Photosynthesis

includes

of

take place in

takes place in

uses

to produce

to produce

use

Light-

dependent

reactions

Calvin cycle

Thylakoid

membranes

Stroma

NADPH

ATP

Energy from

sunlight

ATP

NADPH

O

2

Chloroplasts

High-energy

sugars

Photosynthesis Concept

Map

Slide23

Chloroplast

Light and Water

O

2

Sugars

CO

2

Light-

Dependent Reactions

CalvinCycle

NADPH

ATP

ADP + P

NADP+

Chloroplast

Photosynthesis

: An Overview


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