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Photosynthesis

QuestionAnswer
Describe the process of photosynthesis Chloroplast absorbs sunlight and stores chemical energy
What is the term for an organism that makes its own source of chemical energy? Producer
The main light-absorbing molecules found in plant leaves are called... Chlorophyll
What is the function of the light-dependent reactions? To capture and transfer energy
What do the light-independent reactions need? Carbon dioxide
What takes place in the light-dependent reactions of photosynthesis? Energy is captured
Where do the hydrogen ions for the photosystems of the light-dependent reactions come from? Water
What is described by the following sentence? A series of proteins located in the thylakoid membrane? Electron transport chain in photosynthesis
In the light-independent reactions of photosynthesis what enters the Calvin cycle and what is produced CO2 enters the Calvin cycle and sugars are made
What is the relationship between the photosystems and the Calvin cycle? The photosystems transfer energy to the Calvin cycle through ATP and NADPH
Most of the energy used by life on Earth comes from the... Sun
Organisms that are __________ must consume other organisms to get energy Heterotrophs
Light energy is converted to chemical energy through the process of... Photosynthesis
Which of these do NOT carry out photosynthesis? Plants, algae, animals, certain prokaryotes Animals do not carry out photosynthesis
ATP is composed of a nitrogenous base, a sugar, and... Three phosphate groups
ATP is called a cell's energy ¨currency¨ because... ATP can be ¨made¨ in one place and ¨spent¨ or used in another
When a phosphate group is removed from an ATP molecule what is released? A large amount of energy
An enzyme that catalyzes the synthesis of ATP is... ATP synthase
The series of molecules that cause protons to build up on one side of a membrane is an... Electron transport chain
The space inside the inner membrane of a chloroplast is called the... Stroma
When electrons of a chlorophyll molecule are raised to a higher energy level, they get transferred where? An electron carrier
Chlorophyll is green because... It reflects green wavelengths of light
The major atmospheric byproduct of photosynthesis is... Oxygen
Because of photosynthesis the atmosphere is rich in what gas? Oxygen gas
What is the source of oxygen produced during photosynthesis? Water
While one type of electron transport chain of photosynthesis is used to form molecules of ATP, a second electron transport chain is used to for molecules of ________. NADPH
Hydrogen ion pumps found in the thylakoid membranes are directly responsible for providing the energy to produce _____ molecules. ATP
NADPH is important in photosynthesis because it... Provides high-energy electrons needed to store energy in organic molecules
At a hydrogen ion pump of the thylakoid membrane, energy from electrons is used to make ______. ATP
Products of the light reactions of photosynthesis that are required by the dark reaction are... ATP and NADPH
True or false? Water is the electron source in the dark reactions of photosynthesis. False
Carbon dioxide is converted into organic compounds in the... Calvin cycle
The energy used in the Calvin cycle for the production of sugar molecules comes from... ATP and NADPH
During the final stage of photosynthesis, sugars are produced from... Carbon dioxide
As light intensity increases, the rate of photosynthesis... Increases until the light saturation point is reached
Low temperatures may cause photosynthesis to occur... More slowly
What are the three parts of an ATP molecule? Adenine, ribose, and three phosphate groups
True or false? Chlorophyll is a part of an ATP molecule False
Energy is released from ATP when... A phosphate group is removed
True or false? Used ATP is discarded by the cell as waste. False
Organisms, such as plants, that make their own food are called... Autotrophs
Organisms that cannot make their own food and must obtain energy from external sources are called... Heterotrophs
What happens during photosynthesis? Autotrophs produce carbohydrates
Plants gather energy with light-absorbing molecules called... Pigments
Plants get the energy they need for photosynthesis by absorbing... Sunlight
Most plants appear green because chlorophyll... Does not absorb green light
A granum is a... Stack of thylakoids
The stroma is the region outside the... Thylakoids
Where in the chloroplast is chlorophyll found? In the thylakoid membrane
What happens when chlorophyll is struck by sunlight? The electrons in the chlorophyll molecule become energized
What is the role of NADP+ in photosynthesis? Electron carrier
Photosynthesis uses sunlight to convert water and carbon dioxide into... Oxygen and high-energy sugars
True or false? Nitrogen is found in the overall reaction of photosynthesis. False
In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of... Oxygen
Where do the light-dependent reactions take place? Within the thylakoid membranes
What are the products of the light-dependent reactions? ATP, NADPH, and oxygen gas
True or false? ATP and NADPH are used to produce high-energy sugars in the light-dependent reactions False
What action contributes to the inside of the thylakoid membrane becoming positively charge during the light-dependent reactions? H+ ions are released as water splits
Where are PSI and PSII found? In the thylakoid membrane
Which of the following activities happens within the stroma? The Calvin cycle produces sugars
The Calvin cycle is another name for the... Light-independent reactions
The Calvin cycle takes place in the... Stroma
What is a product of the Calvin cycle? high-energy sugars
How does the Calvin cycle differ from the light-dependent reactions? It takes place in the stroma
If carbon dioxide is completely removed from a plant's environment, what would you expect to happen to the plant's production of high-energy sugars? No more sugars will be produced
If you continue to increase the intensity of the light that a plant receives, what happens? The rate of photosynthesis increases then levels off
Created by: smmr
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