Cell Structure and Function

Which organelle is surrounded by a double membrane?

• Nucleus
• Endoplasmic reticulum
• Chloroplast
• Golgi apparatus

Which structure is NOT part of the cytoskeleton?

• Microtubules
• Microfilaments
• Intermediate filaments
• Cell wall

What is the main function of the cytoskeleton?

• Photosynthesis
• DNA replication
• Protein synthesis
• Mechanical support

What are the two subunits of a 70S ribosome?

• 40S and 50S
• 60S and 30S
• 50S and 30S
• 60S and 40S

What is the sedimentation coefficient for eukaryotic ribosomes?

• 50S
• 60S
• 70S
• 80S