Onion Cell Structure and Microscopy

The video tutorial guides viewers through the process of preparing and observing onion cells under a compound microscope. It begins with an introduction to the materials needed, followed by detailed steps to prepare the onion peel, stain it with methylene blue, and mount it on a slide using glycerin. The tutorial then demonstrates how to observe the specimen under low and high magnification, highlighting the characteristics of plant epidermal cells. The video concludes with a summary and information on further learning resources from Manoj Academy.

Which tool is used to tease the inner lining of the onion peel?

• Needle

• Forceps

• Scalpel

• Scissors

What is the purpose of staining the onion peel with methylene blue?

• To magnify the cells

• To clean the cells

• To make the cells visible

• To dry the cells

Which part of the onion is used for the slide preparation?

• Dry scaly leaf

• Fleshy leaf

• Root

• Stem

What is the purpose of using glycerin in the slide preparation?

• To clean the slide

• To stain the cells

• To keep the specimen moist

• To magnify the cells

Why is it important to avoid air bubbles when placing the coverslip?

• Air bubbles can obscure the view under the microscope

• Air bubbles can stain the cells

• Air bubbles can break the coverslip

• Air bubbles can dry out the specimen

What magnification is first used to observe the onion cells?

• 5x

• 10x

• 20x

• 45x

What is the shape of the epidermal cells observed in the onion peel?

• Triangular

• Hexagonal

• Rectangular

• Circular

What is the location of the nucleus in the onion cells?

• Center of the cell

• Periphery of the cell

• Outside the cell

• Randomly distributed

What is the main characteristic of the epidermal cells in the onion peel?

• They are loosely packed

• They are circular in shape

• They lack a nucleus

• They have a distinct boundary

What type of microscope is used in this experiment?

• Simple microscope

• Stereo microscope

• Electron microscope

• Compound microscope