Chemiosmosis

If the proton (H+) pump in the thylakoid was not working which molecule could not be made during the light reaction?

• NADPH

• ATP

• Water

• Oxygen gas

ATP is made during the light reaction using all of the following EXCEPT

• proton pump

• hydrogen ion gradient

• electron energy from photosystem II

• NADPH donating electrons

ATP Synthase is a membrane protein, through which excess __________ escape the thylakoid in a process that makes ATP.

• water ions

• NADPH ions

• Hydrogen ions

Where is the most easily accessible energy stored in an ATP molecule?

• between the 1st and 2nd phosphate groups

• between the adenine and ribose groups

• between the 2nd and 3rd phosphate groups

• between the ribose and the 1st phosphate groups

Tags

NGSS.HS-LS1-7

an important part of the light reaction that synthesises ATP. It relies on a concentration gradient of protons across the thylakoid membrane

• Primary electron acceptor

• Electron Transport Chain

• Chemiosmosis

• Calvin Cycle

During chemiosmosis

• H+ ions serve as the final electron acceptor

• a concentration gradient is generated when H+ ions are passively transported from the matrix to the intermembrane space of the mitochondrion

• energy is released as H+ ions move freely across the mitochondrial membrane

• ATP is synthesized when H+ ions move through a channel in ATP synthase

Tags

NGSS.HS-LS1-7

What is the primary role of chemiosmosis in cellular respiration?

• To generate a proton gradient for ATP synthesis

• To break down glucose into pyruvate

• To transport oxygen into the mitochondria

• To convert NADH into NAD+

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

In which part of the mitochondria does chemiosmosis occur?

• Outer membrane

• Inner membrane

• Matrix

• Intermembrane space

Which molecule directly powers ATP synthase during chemiosmosis?

• NADH

• FADH2

• Proton (H+) gradient

• Oxygen

What is the main difference between chemiosmosis in chloroplasts and mitochondria?

• The type of ATP synthase used

• The direction of proton flow

• The type of electron carriers involved

• The presence of oxygen