The statement that is TRUE about photophosphorylation is: "It is the process of converting ADP to ATP using sunlight by activating PS2, which involves the process of photolysis."

Here's why:

Photophosphorylation is a process used by plants during photosynthesis to convert ADP (adenosine diphosphate) into ATP (adenosine triphosphate) using the energy from sunlight. This process is carried out in the thylakoid membranes of the chloroplasts in plant cells.

The process begins when sunlight hits Photosystem II (PS2), exciting the electrons within it. This leads to the splitting of water molecules, a process known as photolysis, which releases oxygen and hydrogen ions. The energy from the excited electrons is then used to pump hydrogen ions across the thylakoid membrane, creating a concentration gradient.

As the hydrogen ions flow back across the membrane, they pass through an enzyme called ATP synthase. The energy from this flow is used to add a phosphate group to ADP, creating ATP. This ATP is then used to power other reactions in the plant cell.

The other statements are incorrect because they either involve the wrong process (such as glycolysis, which is a process of glucose breakdown, not light energy conversion), the wrong photosystem (PS1 instead of PS2), or the wrong direction of conversion (ATP to ADP instead of ADP to ATP).

Question

The statement that is TRUE about photophosphorylation is: "It is the process of converting ADP to ATP using sunlight by activating PS2, which involves the process of photolysis."

Here's why:

Photophosphorylation is a process used by plants during photosynthesis to convert ADP (adenosine diphosphate) into ATP (adenosine triphosphate) using the energy from sunlight. This process is carried out in the thylakoid membranes of the chloroplasts in plant cells.

The process begins when sunlight hits Photosystem II (PS2), exciting the electrons within it. This leads to the splitting of water molecules, a process known as photolysis, which releases oxygen and hydrogen ions. The energy from the excited electrons is then used to pump hydrogen ions across the thylakoid membrane, creating a concentration gradient.

As the hydrogen ions flow back across the membrane, they pass through an enzyme called ATP synthase. The energy from this flow is used to add a phosphate group to ADP, creating ATP. This ATP is then used to power other reactions in the plant cell.

The other statements are incorrect because they either involve the wrong process (such as glycolysis, which is a process of glucose breakdown, not light energy conversion), the wrong photosystem (PS1 instead of PS2), or the wrong direction of conversion (ATP to ADP instead of ADP to ATP).

Knowee AI · Accepted Answer

The statement that is TRUE about photophosphorylation is: "It is the process of converting ADP to ATP using sunlight by activating PS2, which involves the process of photolysis."

Here's why:

Photophosphorylation is a process used by plants during photosynthesis to convert ADP (adenosine diphosphate) into ATP (adenosine triphosphate) using the energy from sunlight. This process is carried out in the thylakoid membranes of the chloroplasts in plant cells.

The process begins when sunlight hits Photosystem II (PS2), exciting the electrons within it. This leads to the splitting of water molecules, a process known as photolysis, which releases oxygen and hydrogen ions. The energy from the excited electrons is then used to pump hydrogen ions across the thylakoid membrane, creating a concentration gradient.

As the hydrogen ions flow back across the membrane, they pass through an enzyme called ATP synthase. The energy from this flow is used to add a phosphate group to ADP, creating ATP. This ATP is then used to power other reactions in the plant cell.

The other statements are incorrect because they either involve the wrong process (such as glycolysis, which is a process of glucose breakdown, not light energy conversion), the wrong photosystem (PS1 instead of PS2), or the wrong direction of conversion (ATP to ADP instead of ADP to ATP).

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