Question 1 What is a cell? Question 2 What are unicellular organism. Give example? Question 3 What are multi cellular organism. Give example? Question 4 Who discovered cell? Fundamental Units Of Life Robert Hooke in 1665 discovered cell. He examined a thin slice of cork(substance which comes from bark of a tree)and found that cork resembled structure of honeycomb … [Read more...] about Fundamental Units of Life
The fundamental unit of life:cell
Plastids
Question 1 What are the main functions of plastids? Question 2 What are the major categories of plastids? Question 3 Name the plastic which is green in colour and involved in photosynthesis? Question 4 Why plastids are called as kitchen of cell? Question 5 Describe the two membranes of plastids? Plastids They are present in plant cell but absent in animal … [Read more...] about Plastids
Mitochondria
Question 1 What are the function of Mitochondria? Question 2 Explain the structure of Mitochondria? Question 3 Why Mitochondria is called as power house of cell? Mitochondria (Power house of cell) They are tiny bodies of varying shape(cylindrical,rod-like, spherical)distributed in cytoplasm. Each mitochondria is surrounded by double membrane. Outer membrane is porous. … [Read more...] about Mitochondria
Lysosomes
Question 1 Explain the structure of lysosomes? Question 2 What are the functions of lysosomes? Question 3 Why lysosomes are called digestive bags? Lysosomes They are simple tiny spherical sac like structures evenly distributed in the cytoplasm. Each lysosome is a small vesicle surrounded by a single membrane and contains enzymes.These enzymes are capable of … [Read more...] about Lysosomes
Golgi Apparatus
Question 1 What are the main functions of Golgi apparatus? Question 2 Explain the structure of Golgi apparatus? Golgi Apparatus (1) It consist of set of membrane bounded, fluid-filled vesicles, vacuoles and flattened cisternae. (2) Cisternae are usually packed together in parallel rows. (3) They arises from membrane of smooth ER, which in turn originates from rough … [Read more...] about Golgi Apparatus