Cell Structure and Function Concepts

The video tutorial covers osmosis, explaining the role of cell membranes in regulating particle movement. It demonstrates osmosis in plant cells using onion cells and discusses the effects of hypotonic and hypertonic solutions. The tutorial also examines animal cells, highlighting differences from plant cells. Finally, it explores yogurt production through fermentation, focusing on bacterial conversion of lactose to lactic acid.

What is the primary function of a cell membrane?

• To regulate what enters and exits the cell

• To produce proteins

• To provide energy to the cell

• To store genetic information

Which type of transportation requires energy?

• Osmosis

• Diffusion

• Active transportation

• Passive transportation

In a hypotonic solution, what happens to a plant cell?

• It shrinks

• It bursts

• It swells

• It remains unchanged

Why do animal cells burst in a hypotonic solution?

• They have too much solute

• They are too rigid

• They lack a cell wall

• They have a cell wall

What is the effect of placing a cell in a hypertonic solution?

• The cell swells

• The cell bursts

• The cell remains unchanged

• The cell shrinks

What is the shape of an animal cell compared to a plant cell?

• Boxy

• Globular

• Rectangular

• Triangular

What is the main difference between plant and animal cells observed in the demonstration?

• Plant cells have a cell wall

• Animal cells have a cell wall

• Animal cells have chloroplasts

• Plant cells have a nucleus

What process is used to make yogurt?

• Photosynthesis

• Fermentation

• Respiration

• Osmosis

What do bacteria convert lactose into during yogurt production?

• Ethanol

• Glucose

• Lactic acid

• Carbon dioxide

Why is lactic acid produced in the body?

• To break down proteins

• To store energy

• Due to excess oxygen

• Due to lack of oxygen