Cell Structure and Function

How many nuclei are typically present in a skeletal muscle cell?

• One
• Two
• Multiple
• None

Which of the following cells is an example of a cell with a lobed nucleus?

• Red blood cell
• Sperm cell
• White blood cell (WBC)
• Nerve cell

What is the primary function of the nuclear lamina?

• To synthesize ribosomal RNA
• To transport mRNA out of the nucleus
• To provide structural support to the nucleus
• To initiate DNA transcription

Which of the following best describes heterochromatin?

• Loosely coiled and highly active
• Highly coiled and genetically less active
• Not visible under a microscope
• Made entirely of proteins

Which type of chromatin is genetically more active and less condensed?

• Heterochromatin
• Constitutive chromatin
• Euchromatin
• Facultative chromatin