Cell Structure and Function

What is the main function of the nuclear pores in the nuclear envelope?

• To synthesize DNA during replication
• To provide structural support to the nucleolus
• To regulate the movement of molecules such as RNA and proteins between the nucleus and cytoplasm
• To initiate cell division

Which of the following best describes the primary role of the nucleus in a eukaryotic cell?

• It produces energy for the cell
• It synthesizes lipids and carbohydrates
• It stores and protects genetic material and controls cellular activities
• It facilitates cell movement

Which of the following statements best describes the role of the nucleus in cell division?

• It dissolves completely during cell division
• It only participates in meiosis
• It stores energy for cell division
• It participates in mitotic and meiotic cell divisions to ensure genetic continuity

What distinguishes heterochromatin from euchromatin in the nucleus?

• Heterochromatin is loosely coiled and genetically active
• Heterochromatin is highly coiled and genetically less active, while euchromatin is loosely coiled and more active
• Euchromatin is dark-staining and inactive
• Heterochromatin lacks DNA

Which component of the nucleus is responsible for ribosome production?

• Chromatin
• Nuclear membrane
• Nucleolus
• Nuclear pore