Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during photosynthesis?(1 point)
Responses
It was recycled when water was formed.
It was recycled when water was formed.
It was recycled when ligh energy was formed.
It was recycled when ligh energy was formed.
It was recycled when glucose was formed.
It was recycled when glucose was formed.
It was recycled when hydrogen gas was formed.
It was recycled when hydrogen gas was formed.
It was recycled when water was formed.
The correct answer is: It was recycled when water was formed.
The correct answer is: It was recycled when water was formed.
During photosynthesis, plants take in carbon dioxide and water and convert them into glucose and oxygen. The water molecule is made up of two hydrogen atoms and one oxygen atom. When radioactive hydrogen is used to make water, these radioactive hydrogen atoms become a part of the water molecule.
During photosynthesis, the water molecules are broken down in a process called photolysis. This occurs in the thylakoid membranes of the chloroplasts, where light energy is absorbed by chlorophyll. This energy is used to split the water molecule, releasing oxygen and producing electrons, protons (H+ ions), and energy-rich molecules like ATP and NADPH.
The protons released from the photolysis of water are then used to power the synthesis of ATP, which is a form of chemical energy that plants use. The electrons are passed along a series of molecules in the thylakoid membrane, generating a flow of energy that is eventually used to convert carbon dioxide into glucose during the Calvin cycle.
In summary, the radioactive hydrogen atoms that were used to make water are recycled during photosynthesis when the water molecules are broken down. The protons released from this process are used to generate ATP and the electrons go through an electron transport chain, which eventually helps in the synthesis of glucose.