Question

Choose the correct answers from the alternatives given :
Compared with other cell components (organelles, cell membrane or nucleus), the mitochondria would be the only fraction that would

• A. form an electrochemical gradient across a membrane
• B. use significant amounts of oxygen
• C. use a chemiosmotic complex to produce ATP
• D. release protons$(H{+}^{)}$

Answer 1

Answer: (B), (C)

The correct options are
B use significant amounts of oxygen
C use a chemiosmotic complex to produce ATP

• Mitochondria is the organ of the cell that is involved in the production of ATP during cellular respiration.
• The pyruvate produced from the glycolysis is converted into acetyl CoA which then enters the mitochondrial chamber where it takes part is kerb cycle that at the end will produce molecules of NADH FACH.
• These NADH and FADH molecules have to go through the Electron transport system and oxidative phosphorylation that will produce hydrogen ions and electrons.
• 2 of the hydrogen ions that are released from the ETS are accepted by the oxygen molecule and form water thus completing the chain of ETS.
  
• These released hydrogen ion form a concentration gradient which will help in formation of ATP by chemiosmotic phosphirylation where hydrogen ions are transported from the intermembrane matrix down their concentration gradient and for every 2 hydrogen ions passed one molecule of ATP is formed.
• Therefore option "use significant amounts of oxygen" and "use a chemiosmotic complex to produce ATP" are correct answers.