Cell Structure and Staining Techniques

The video tutorial explains the basic structure and function of cells, distinguishing between prokaryotic and eukaryotic cells. It describes an experiment to observe human cheek epithelial cells using a compound light microscope. The process involves preparing a stained slide and analyzing the cell structures, including the nucleus and cytoplasm. The tutorial highlights the differences between plant and animal cells and the presence of bacteria in the oral cavity.

What is the primary difference between prokaryotic and eukaryotic cells?

• Presence of a cell wall

• Ability to perform photosynthesis

• Size of the cell

• Presence of a membrane-bound nucleus

Which of the following is an example of a unicellular eukaryote?

• Animal

• Bacteria

• Algae

• Fungi

What is a key structural difference between plant and animal eukaryotic cells?

• Presence of a cell membrane

• Presence of a cell wall

• Presence of cytoplasm

• Presence of a nucleus

Which material is NOT required for the experiment to prepare a stained slide of cheek cells?

• Methylene blue stain

• Glass slides

• Petri dish

• Glycerine

What is the purpose of using methylene blue in the experiment?

• To clean the slide

• To stain the cells for better visibility

• To fix the cells on the slide

• To provide nutrients to the cells

What should be avoided when lowering the cover slip onto the specimen?

• Using a glass slide

• Trapping air bubbles

• Adding glycerine

• Using too much stain

What is the shape of the nucleus in human cheek epithelial cells?

• Round

• Triangular

• Square

• Oval

What are the deeply stained dots observed on the surface of cheek cells?

• Cell organelles

• Nuclei

• Bacterial cells

• Cytoplasmic granules

What is the main function of the cell membrane in eukaryotic cells?

• To store genetic material

• To perform photosynthesis

• To enclose the cytoplasm

• To provide energy

Which of the following is NOT a component of the cytoplasm?

• Cell organelles

• Cell wall

• Cytoplasmic granules

• Nucleus