Fundamental units of life

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…

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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…

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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.Inner membrane has folds and therefore have large…

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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…

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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 ER. Functions 1)They are…

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Endoplasmic reticulum

Question 1 Where do the ribosomes get synthesised? Question 2 What are the main functions of Endoplasmic reticulum? Question 3 Give the structure of Endoplasmic reticulum? Question 4 Name two types of Endoplasmic reticulum? Question 5 Define the term membrane biogenesis? Endoplasmic Reticulum(ER) ER is a large network of membrane bound tubes and sheets. ER occurs in…

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Cytoplasm

Question 1 What is cytoplasm? Question 2 Explain the structure of cytoplasm? Question 3 Give the functions of cytoplasm? Cytoplasm The part of the cell which occurs between plasma membrane and nuclear membrane is called cytoplasm. The inner granular mass of cytoplasm is called endoplasm.The outer clearer layer is called ectoplasm. Cytoplasm consist of an…

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Nucleus

Question 1 Who discovered nucleus? Question 2 What is the location of nucleus? Question 3 Explain the structure of nucleus? Question 4 Differentiate between  Prokaryotic Cell and Eukaryotic cell? Question 5 What are chromosomes made of? Question 6 Give the characteristics of different types of chromosome? Question 7 What is a diploid cell? Question 8…

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Cell organelles-plasma membrane

Question 1 What are cell organelles? Question 2 What is plasma membrane? Question 3 Why plasma membrane is  called as semi-permeable membrane? Question 4 Define the term diffusion? Question 5 Define osmosis? Question 6 How carbon dioxide and oxygen undergoes diffusion? Question 7 What are hypotonic solution.Give example? Question 8 What are the three major…

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