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Biology Important Question

Name the structural and function unit of all life forms - Cell
☞: Who discovered cell - Robert Hooke
☞: Who discovered nucleus of the cell - Robert Brown
☞: Cells are made up of __________ - Protoplasm
☞: Outer covering of a cell is called ________ and it is made up of _________ - Plasma, lipids & proteins
☞: Nucleus and cytoplasm are contained in _________of the cell - Cell Membrane
☞: Which part of the cell is its controlling centre - Nucleus
☞: What does DNA contain? - Genetic Information that is passed from one generation to another
☞: What does RNA contain? - It is genetic carrier of some microorganisms (e.g. HIV)
☞: What is the main component of cell wall in case of plant cells? - Cellulose
☞: Which part of the cell is also known as digestive bag?- Lysosomes
☞: __________ is known as "powerhouse of the cell"- Mitochondria
☞: What are protein made of? - Amino Acid
☞: Name the vitamins that are water soluble and that are fat soluble? - A,D,E,K are fat soluble and B,C are water soluble
☞: Name the vitamin that is important for blood coagulation - Vitamin K
☞: What kind of disease is malaria? - Malaria is a protozoan disease caused by protozoan parasite plasmodium.
☞: Name the plant tissues responsible for transportation of water and food in plants- Xylem transports water and Phloem transport food.
☞: What are cartilage, blood, bones, tendons and ligaments?- Connective Tissues
☞: Why is Blood Red in Color? - Due to the presence of RBC's that contain red colored pigment called Haemoglobin.
☞: What is the role of WBC's ? - WBC's contain Antibodies that protect human body from infections.
☞: Where are blood cells manufactured? - In bone marrow from stem cells
☞: Name two nitrogen fixation bacteria- Azotobacter and rhizobium
☞: The branch of biology under which the living organisms and their relation with their surroundings is studied is known as - Ecology
☞: Promotion of algae in a water body due to the increase in amount of falling industrial and sewage water decreases the BOD of water and depletes the dissolved oxygen is called - Eutrophication.
☞: What is BOD? -Biochemical oxygen Demand also called Biological oxygen demand is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
☞: Why is EEG(Electro Encephalo Gram) used? - It detects electrical activity in your brain using small, flat metal discs (electrodes) attached to your scalp.
☞: Which glands are also known as Ductless Glands? - Endocrine
☞: Largest bone in Human Body - FEMUR
☞: Shortest bone in Human Body - STAPES or STIRRUL Bone (in the middle ear)
☞: The gland which is both endocrine as well as exocrine - Pancreas

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