Cell Structure and Function

Which of the following cells is an example of a multinucleate cell?

• Red blood cell
• Sperm cell
• Skeletal muscle fiber
• Epithelial cell

What is the main function of the nuclear envelope in gene regulation?

• It synthesizes DNA
• It controls the transport of transcription factors and RNA
• It degrades old genes
• It replicates the nucleolus

Which of the following best describes the nucleoplasm?

• A solid structure that holds chromosomes
• A gel-like substance containing enzymes, ions, and nucleic acids
• A lipid layer surrounding the nucleus
• A network of blood vessels

What is the primary reason for the presence of ribosomes on the outer nuclear membrane?

• To produce ATP
• To protect the nucleus
• To facilitate protein synthesis for the endomembrane system
• To degrade old nuclear proteins

What is the fate of the nucleolus during mitosis?

• It doubles in size
• It migrates to the cytoplasm
• It disassembles during prophase and reforms in telophase
• It becomes part of the nuclear membrane