Onion Epidermis Drawing Stain: Lges lodie Actual Size: Plate/Drawing Magnificati

Question

Onion Epidermis Drawing Stain: Lges lodie Actual Size: Plate/Drawing Magnification: sice of your drawing of object)/(actual size of the cel Questions 1. How does using a stain change the visibility of the structures? Why What features can you see under the microscope that alow you to characterize these cels a eukaryotic cells? 2. Plant cells are surrounded by a plasma membrane and they also have cell walls. What are the major components of plasma membranes? What is the majior component of plant cell walls?

Explanation / Answer

Question 1 answer will be " Onion cell has starch granules and carbohydrates layers..These carbohydrates has high affinity towards iodine solutions..When we stain with iodine containing stain then it binds with the carbohydrates of onion cells and make them visible."

Question 2 answer will be under the microscope we can see distinctly the nucleus, vacuoles,cell membrane and the cell wall..From these features we can say that this cell to be eukaryotic cells..

Question 3 answer will be" Major components of plasma membrane are phospholipids..these phospholipids are arranged in bilayers (in two layers)..some carbohydrates and proteins are also embedded in these layers of plasma membrane..

Major components of plant cell wall are cellulose and hemicellulose..These are complex carbohydrates..

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