Photosynthesis Flashcards
(27 cards)
State the equation of photosynthesis
Anki
Give two roles of photosynthesis
Provides oxygen for organisms in order for respiration to occur
Plant season to make food animals get their food from plants
State why photosynthesis is an anabolic reaction
Converts a smaller molecule carbon dioxide into a large molecule , glucose
State the site or cell organelle of photosynthesis
Chloroplast
Name the green pigment found in the chloroplast and state its role
Chlorophyll
Absorb sunlight
Describe what happens to water when sunlight is absorbed by chloroplast
Trapped sunlight is used to split water in the chloroplast
Photo lysis
Splits into 4 protons
which end up in the proton pool and used as a form of glucose
, 4 electrons,
passed to the chlorophyll where sunlight energises them
and an oxygen molecule passed out into the atmosphere or kept in the plant for respiration
Give two fates of oxygen formed during photosynthesis
Passed out into the atmosphere or kept and used for respiration in the plant.
Where do energised electrons form during photosynthesis
Electron acceptors
Name one internal source of Carbon dioxide for photosynthesis
Protons
Name one external source of Carbon dioxide for photosynthesis
State two ways of increasing the rate of photosynthesis
Increase light intensity
Increase of C02 concentration
Which stage is the first stage
light stage
Why is the light stage also known as the light dependent stage
It requires light to take place
Why is the dark stage also known as the light independent stage
Doesn’t require light to take place
Name the stage is controlled by enzymes
Dark stage
To describe in detail electron pathway 1
High energy electrons , past from electronic sector to a series of electronic tempters , releasing energy.
The energy released by electrons is trapped by a d p and a phosphate to form a t p
The electrons return back to the chlorophyll molecule
What is the product of electron pathway 1
Atp and water
Where do the energised electrons return to
To the chlorophyll
To describe in detail electron pathway 2
Water splits into four protons for electrons and oxygen
Two of these electrons passed through the churroll , where they become energize
Please electrons past from the chlorophyll to a series of electronic sectors where they release Energy to help form at
The energy released is used to make more atp.
These high energy electrons do not return to the chlorophyll
2 Electrons then combine with nadp plus to Form nadp minus
A proton from the splittion of water is used to form NADPH
What happens to water in pathway 2
Water Splits in photolysis
Into 4 protons, 4 electrons, and oxygen
What is formed from electron pathway 2
Energy
List the three products of the light stage and state which two are needed for the dark stage
ATP
Supplies energy for the dark stage reactions to help form glucose.
NADPH
Transfers protons and energized electrons for the dark stage reactions to help them form glucose
OXYGEN
State the function of all three products of light stage
ATP
Supplies energy for the dark stage reactions to help form glucose.
NADPH
Transfers protons and energized electrons for the dark stage reactions to help them form glucose
OXYGEN
Made when water spitz, can be used for respiration within the plants or released into the atmosphere.
To describe the dark stage
Reaction of the dark stages are controlled by enzymes which can be affected by temperature
Take place in the different part of the chloroplast
Carbon dioxide enters the chloros by diffusion
N a d ph transfers Protons and energized electrons for dark stage reactions
Protons and electrons reduce carbon dioxide to glucose
Atp is used to supply energy to form glucose
