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WorksheetsBioman Photosynthesis Q's
Total questions: 10
Worksheet time: 5mins
Which part of the plant cell performs photosynthesis?
Mitochondrion
Nucleus
Cell Wall
Chloroplast
What does light do when it strikes the chlorophyll molecules of photosystems I and II?
Light causes glucose to be synthesized directly inside the chlorophyll molecules of the photosystems.
Light causes the conversion of water into carbon dioxide, oxygen and electrons.
Light directly causes carbon dioxide to attach to RuBP during the carbon fixation stage of the Calvin Cycle.
Light causes electrons to get excited (gain energy) and travel down an electron transport chain embedded in the thylakoid membrane.
After light excites electrons and they leave Photosystem II to travel down the first electron transport chain. How are these electrons replaced to Photosystem II?
Water is split, and the electrons are given to the chlorophyll molecules of photosystem II.
Carbon dioxide is split, and the electrons are given to the chlorophyll molecules of photosystem II.
Oxygen is reduced and the electrons are given to the chlorophyll molecules of photosystem II.
Hydrogen undergoes fusion, and the electrons are given to the chlorophyll molecules of photosystem II.
The splitting of water at photosystem II is known as ______________________ and results in the production of ______________________.
Photolysis; oxygen, hydrogen ions (protons), and electrons that are given to photosystem II.
Photosynthesis; carbon dioxide, G3P, and electrons that are given to photosystem II.
The Calvin cycle; carbon dioxide, G3P, and electrons that are given to photosystem II.
Chemiosmosis; oxygen, hydrogen ions (protons), glucose and electrons that are given to photosystem II.
As the electrons travel from photosystem II down the first electron transport chain, their energy is used to…
Form oxygen, water, NADPH and glucose.
Pump hydrogen ions into the stroma, producing a concentration gradient that will later be used by an enzyme to form ADP and phosphate.
Pump hydrogen ions into the thylakoid space, producing a concentration gradient that will later be used by ATP synthase to form ATP.
Create glucose directly.
Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase?
They are pumped actively through ATP synthase. This uses up ATP energy and causes the production of ADP and phosphate.
They flow through the Calvin cycle and produce light.
They flow passively from high to low concentration via facilitated diffusion. As they flow through ATP synthase, the enzyme spins and produces ATP.
Hydrogen ions do not actually flow from the thylakoid space to the stroma. They flow the opposite way.
After electrons get excited by light a second time (at photosystem I), where do they go?
They travel down a second electron transport chain and are donated to NADP+, which becomes NADPH (an electron carrier).
They travel down a second electron transport chain and are donated to ADP, which is then converted to ATP.
They remain excited and then travel to photosystem II where they get even more excited until they spontaneously combust.
They travel down a second electron transport chain and are donated to oxygen which then bonds to hydrogen ions to form water.
Which products of the light-dependent reactions are used in the Calvin Cycle to help form reduced organic compounds?
Oxygen, ATP, NADPH, and CO2
Water and CO2
Light, water and CO2
ATP and NADPH
What happens during the carbon fixation stage of the Calvin Cycle (light-independent reactions)?
The enzyme Rubisco attaches CO2 to RuBP, causing the formation of molecules of 3-phosphoglycerate.
Energy from ATP and electrons from NADPH are used to reduce 3-phosphoglycerate to form G3P molecules (which can be used to form other organic molecules such as glucose).
The remaining G3P molecules that have not exited the cycle are used to re-form RuBP through a series of chemical reactions, so that the Calvin cycle can continue.
Oxygen is produced through this process.
What happens during the reduction stage of the Calvin Cycle (light-independent reactions)?
The remaining G3P molecules that have not exited the cycle are used to re-form RuBP through a series of chemical reactions, so that the Calvin cycle can continue.
Oxygen is produced through this process.
Energy from ATP and electrons from NADPH are used to reduce 3-phosphoglycerate to form G3P molecules (which can be used to form other organic molecules such as glucose).
The enzyme Rubisco attaches CO2 to RuBP, causing the formation of molecules of 3-phosphoglycerate.
