Cell Structure and Function

What is the main function of cristae in the inner mitochondrial membrane?

• Store genetic material
• Regulate ion flow
• Separate DNA strands
• Increase surface area for ATP production

Which of the following is true about mitochondrial DNA?

• It is identical to nuclear DNA
• It cannot replicate
• It is linear
• It encodes some mitochondrial proteins

Which part of the mitochondrion has a smooth structure?

• Inner membrane
• Matrix
• Cristae
• Outer membrane

Which of the following is NOT a function of the mitochondrial inner membrane?

• Forming cristae
• Creating proton gradient
• Hosting electron transport chain
• Storing nutrients

Which of the following supports the endosymbiotic theory regarding mitochondria?

• Absence of DNA
• Presence of cell walls
• Ability to photosynthesize
• Presence of 70S ribosomes