Answer- If ever the plasma membrane ruptures or breakdown then the cell will not be able to exchange material from its surroundings by diffusion. What is active transport? No other organelle has this property. A) Control Unit B) Arithmetic Logic Unit C) Central Processing Unit D) Storage Unit. Class 9 Science Chapter 5 is the first chapter of Biology in standard 9. Therefore, protoplasts of plant cells are connected by cytoplasmic channels through their walls which are called as plasmodesmata. He used self-designed microscope to observe cells in a cork slice back then. Give it a try and see if you are in need of some more studying hours. (b) Muscle cell. What is the Structural Organisation of a Cell? These online MCQ tests includes all main concepts of the The Fundamental Unit of Life in CBSE Class IX Science . MCQs from CBSE Class 9 Science Chapter 5: The Fundamental Unit of Life … Answer: 1. The main function of Golgi bodies is to release proteins or enzymes by vesicles. (b) Chloroplasts. Answer: A person takes concentrated solution of salt, after sometime, he starts vomiting. If yes, explain why. [NCERT Exemplar] Why were the scientists not able to observe most of the cell organelles before 1940? Where will you find more number of ribosomes-in cancer cells or in fat cells? What is cytosol and cytoskeleton? [NCERT Exemplar] Answer- Plasma membrane called a selectively permeable membrane because it regulates the movement of substances from within to outside of the cell. Answer: Answer: Question 8. Free PDF download of Important Questions with solutions for CBSE Class 9 Science Chapter 5 - The Fundamental Unit of Life prepared by expert Science teachers from latest edition of CBSE(NCERT) books. Question 12. A. Answer: Answer- Osmosis is the process in which water molecules moves from the region of high concentration to a region of low concentration through a semi permeable membrane. RER manufactures proteins and transports them to various places. Active transport always involves the expenditure of energy because the materials are pumped against the concentration gradient. Mohl. Question 10. They have ribosomes attached on their surfaces. Ribosomes, Question 27. Fundamental Unit of Life Chapter 5 Class 9 Science Explanation in Hindi, Imp Questions and Answers. Draw a neat labelled diagram of an animal cell. The questions includes 1 mark questions, 2 mark questions, 3 mark questions, 4 mark questions, 5 mark questions and other questions as per the latest CBSE curriculum for the current session. Cell wall is made up of which component? It is a ready to study material for class 9 student of CBSE Board. Why are peroxisomes mostly found in kidney and liver cells? Facebook Twitter Pinterest Email WhatsApp Telegram SMS Reddit Write the name of different plant parts in which chromoplast, chloroplast and leucoplast are present. Answer: 4. Question 7. What is hypotonic solution? Here you can get Class 9 Important Questions Science based on NCERT Text book for Class IX. Here you can get Class 9 Important Questions Science based on NCERT Text book for Class IX.Science Class 9 Important Questions are very helpful to score high marks in board exams. Download Class 9 Science Multiple Choice Questions PDF Enhance your subject knowledge taking the help of MCQs of Class 9 Science and practice them on a regular basis. Question 9. Animals do not have rigid walls because cell walls are incompatible with the way in which an animal moves and grow. Movement of molecules from a region of higher concentration to a region of lower concentration is called diffusion. (a) A bacterium (b) An Amoeba (c) A virus (d) A sperm Answer: (c) Viruses are considered as an intermediate between living and non-living cells because they cannot metabolise and reproduce on their own. Answer- Lipids are synthesized in Smooth endoplasmic reticulum and the proteins are synthesized in endoplasmic reticulum. Chapter 5. Q.2 Cell is called structural and functional unit of life. Hence a cell is called the functional unit of life. Magnification of a microscope is calculated by multiplying the powers of eyepiece and objective lenses. Answer- Golgi apparatus performs the function of a storage modification and packaging of products. The Lakhmir Singh Biology Class 9 Solutions have been explained in such a manner that it helps students to know the concepts with ease. Answer- Lysosomes are called suicide bags because in case of any disturbance of their cellular metabolism they release their own enzymes to digest their own cell. Question 6. Question 4. Plants absorb all the colours in the spectrum. Answer: B. Protoplasm. Class 9 is one of the most important stages in a student’s life. Why? A solution having solute concentration same as that of the cell sap is called isotonic solution. Genes are located on chromosomes in the nucleus. Leucoplasts are present anywhere in plant as they are colourless and store food. Answer: What is the phenomenon responsible for such situation? After modification, these are transported to the cell surface through vesicles which bud off from Golgi complex to fuse with cell membrane and form a part of the membrane. Which organelle serves as a channel for transport of materials between cytoplasm and nucleus? They pull the chromosomes apart and bring them at the poles. Question 5. Q.1 Define cell. Answer: Therefore RBC will burst easily while onion cell peels will resist it to some extent. Which organelles other than nucleus contain DNA? The flaccid cell membrane provides the animal cell freedom of mobility and formation of different tissues which is not present in plants. It also prevents movement of some other materials. Class 9 Science NCERT Textbook – Page 61 Question 1. Also, relearn the importance and functions of the mitochondria and the … Question 20. Question 3. Differentiate between diffusion and osmosis. Greater the surface is, a large amount of raw material can enter (this is the case of unicellular micro-organisms). Chloroplasts contain the pigment chlorophyll which is responsible for food preparation in plants by the process of photosynthesis . (d) RBC and onion peel cells will behave similarly. Why does the skin of your finger shrink when you wash clothes for a long time? All the questions are important and useful for clearing the doubts in chapter 5 of standard 9 science. (e) golgi apparatus is removed from the cell? Nucleus, also known as the brain of the cell, controls most of the activities of the cell because it contains DNA (Deoxyribonucleic acid) which contains all the information of the cell. What are chromosomes made up of? Question 1. 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