Cell Structure and Function

What is the primary role of cristae in mitochondria?

• To separate the matrix from the cytoplasm
• To store DNA molecules
• To regulate ion transport
• Increase surface area for ATP production

Which of the following is not found in the mitochondrial matrix?

• Circular DNA
• Ribosomes
• Enzymes
• mRNA

Which of the following is not a function of mitochondria?

• ATP production
• DNA replication
• Protein synthesis
• Photosynthesis

Which plastid can transform into another type?

• Chloroplast
• Chromoplast
• Leucoplast
• None of the above

Which of the following is not a function of leucoplasts?

• Storing starch
• Storing oils
• Photosynthesis
• Storing proteins