Question

this is a slide of human cheek cells. after scraping the inside of their mouths, students in ms. gordons class smeared the swab on a slide and stained them blue. these cells are parts of a large, complex organism, a human. but these cells, like the other cells in the human body all have an important organelle, seen here. it stains dark blue and is the control center of the cell. what is this organelle? a dna b cytoplasm c membrane d nucleus

Explanation:

• DNA is the genetic material, not an organelle.
• Cytoplasm is the fluid - like substance inside the cell, not the control center.
• Membrane (cell membrane) is for protection and regulation of substances entering and leaving the cell, not the control center.
• The nucleus contains the cell's genetic material (DNA) and controls the cell's activities, acting as the control center. It can be stained dark blue as described.

Answer:

D. nucleus