Table of Contents
- 1 Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase?
- 2 Why is energy required to move the hydrogen ions across the membrane into intermembrane space?
- 3 Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase quizlet?
- 4 How do hydrogen ions get back into the stroma?
- 5 Why does the lumen become positively charged during the light-dependent reaction?
- 6 What happens to the hydrogen ions that are split from the water molecules during photosynthesis?
- 7 How do hydrogen ions escape the thylakoid membrane?
- 8 What molecules can diffuse through the plasma membrane?
Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase?
Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase? A. They are pumped actively through ATP synthase. This uses up ATP energy and causes the production of ADP and phosphate.
Why is energy required to move the hydrogen ions across the membrane into intermembrane space?
The hydrogen ions reach the inter-membrane space through protein channels embedded in the mitochondrial membrane. Energy is required to move the hydrogen ions across the membrane because the hydrogen ions are moving against the concentration gradient.
What happens to hydrogen ions in photosynthesis?
The hydrogen ions are allowed to pass through the thylakoid membrane through an embedded protein complex called ATP synthase. The energy generated by the hydrogen ion stream allows ATP synthase to attach a third phosphate to ADP, which forms a molecule of ATP in a process called photophosphorylation.
What releases energy that is used to pump hydrogen ions from the stroma into the thylakoid compartment?
Terms in this set (10) ATP synthase phosphorylates ADP. Which of these phosphorylates ADP to make ATP? The energy released as electrons are passed along the electron transport chain is used to pump protons into the thylakoid compartment.
Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase quizlet?
light is absorbed increasing the energy of the electrons. the electrons are passed down the electron transport chain. hydrogen ions flow from the thylakoid space to the stroma through ATP synthase causing it to spin, releasing energy, then the energy is pciked up by ADP and a phosphate forming ATP.
How do hydrogen ions get back into the stroma?
Along with a hydrogen ion, this produces the energy-carrying molecule NADPH. It causes hydrogen ions to flow back across the thylakoid membrane to the stroma, where their concentration is lower. Like water flowing through a hole in a dam, the hydrogen ions have energy as they flow down the chemiosmotic gradient.
Why do hydrogen ions flow back across the mitochondrial membrane?
The pumping of hydrogen ions across the inner membrane creates a greater concentration of the ions in the intermembrane space than in the matrix. This chemiosmotic gradient causes the ions to flow back across the membrane into the matrix, where their concentration is lower.
Why is the active transport of the hydrogen ions across the membrane important?
Moving Against a Gradient Small substances constantly pass through plasma membranes. Active transport maintains concentrations of ions and other substances needed by living cells in the face of these passive movements. Much of a cell’s supply of metabolic energy may be spent maintaining these processes.
Why does the lumen become positively charged during the light-dependent reaction?
Why does the space inside the thylakoid become positively charged during the light-dependent reactions? ATP synthase helps H+ ions in the thylakoid space to pass through the membrane to the stroma.
What happens to the hydrogen ions that are split from the water molecules during photosynthesis?
During photosynthesis, the energy from sunlight is used to split water molecules. What happens to the hydrogen ions that are split from the water molecules? They flow out of the thylakoid, providing energy to add a phosphate group to ADP.
What happens to the hydrogen ions that are split from the water molecules?
Why does the lumen become positively charged during the light dependent reaction?
How do hydrogen ions escape the thylakoid membrane?
Hydrogen ions have a positive charge. Like in magnets, the same charges repel, so the hydrogen ions want to get away from each other. They escape the thylakoid through a membrane protein called ATP synthase.
What molecules can diffuse through the plasma membrane?
Some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.
What happens when H+ ions are pumped into the intermembrane space?
As more H+ ions are pumped into the intermembrane space, the higher concentration of hydrogen atoms will build up and flow back to the matrix simultaneously powering the production of ATP by the protein complex ATP synthase. ATP synthase uses the energy generated from the movement of H+ ions into the matrix for the conversion of ADP to ATP.
Why can’t molecules cross the phospholipid membrane?
However, because they are charged or polar, they can’t cross the phospholipid part of the membrane without help. Facilitated transport proteins shield these molecules from the hydrophobic core of the membrane, providing a route by which they can cross. Two major classes of facilitated transport proteins are channels and carrier proteins.
https://www.youtube.com/watch?v=EUDQN5rMvMo