The Fundamental Unit of Life Practice Sheet PDF

SPRINT CLASS-9TH ONE SHOT SERIES Practice Sheet The Fundamental Unit of Life Section A - Multiple choice questions 7. An unr...

SPRINT CLASS-9TH ONE SHOT SERIES Practice Sheet The Fundamental Unit of Life Section A - Multiple choice questions 7. An unripe green fruit changes colour when it 1. In which of the following cell organelles ripens. The reason being? (1 Mark) functions both as an intercellular transport system (A) Chromoplasts changes to chlorophyll and as a manufacturing surface? (1 Mark) (B) Chromoplasts changes to chromosome (A) Nucleus (C) Chromosomes changes to chromoplasts (B) Mitochondria (D) Chloroplast changes to chromoplasts (C) Endoplasmic Reticulum (E) None of the above (D) None of these 8. ________ coined the term “cell.? (1 Mark) 2. Which of the following can be made into crystal? (A) Gorbachev (1 Mark) (B) Himmler (A) Bacteria (B) Amoeba (C) Robert Hooke (C) Virus (D) Sperm (D) Antonie van Leeuwenhoek 3. Choose the incorrect statement? (1 Mark) 9. The phenomenon where cytoplasms shrink in a (A) Lysosomes serve as intracellular digestive hypertonic medium is called? (1 Mark) system so it is as called digestive bags. (A) Frontolysis (B) Lysosomes are also known as suicide bags (B) Plasmolysis of the cell and works as a kind of garbage (C) Acidolysis disposal system (D) Allolysis (C) Mitochondria are present in bacteria and the red blood cells of mammals. Section B - Very short answer type questions (D) The mitochondria synthesize energy rich compounds (ATP), they are known as 10. What is hypotonic solution? (2 Marks) powerhous of the cell. 11. What is endocytosis? (2 Marks) 4. Organelle other then nucleus containing DNA is? 12. Which cell organelle controls most of the activities (1 Mark) of the cell? (2 Marks) (A) Endoplsmic Reticulum (B) Golgi apparatus (C) Mitochondria Section C- Short answer type questions (D) Lysosome 13. What is cytosol and cytoskeleton? (3 Marks) 5. Assertion (A) : All plants and animals are 14. Do you agree “A cell is a building unit of an composed of cells. organism”. If yes, explain why? (3 Marks) Reason (R) : Cell is the basic unit of life. (1 Mark) 15. Write the name of different plant parts in which (A) Both assertion and reason are true, and chromoplast, chloroplast and leucoplast are present? reason is the correct explanation of assertion. (B) Both assertion and reason are true, but (3 Marks) reason is not the correct explanation of Section D - Long answer type questions assertion. 16. What is active transport? Differentiate between (C) Assertion is true, but reason is false. active and passive transport. (5 Marks) (D) Assertion is false, but reason is true. 6. Chromosome are made up of? (1 Mark) (A) DNA (B) Protein (C) DNA & Protein (D) RNA  ANSWER KEY 1. (C) 6. (C) 2. (C) 7. (D) 3. (C) 8. (C) 4. (C) 9. (B) 5. (A)  HINTS AND SOLUTIONS 1. (C) Endoplasmic Reticulum framework for the organelles. 2. (C) Virus 14. An organism is made up of various organ systems like digestive system, nervous system, etc. These 3. (C) Mitochondria are present in bacteria and the organ systems in turn are made up of various red blood cells of mammals. organs which are made up of tissues. Also tissues are a group of cells performing the same function. 4. (C) Mitochondria Hence, a cell is the building unit of an organism. Cell → tissue → organ → organ system → organism 5. (A) Both assertion and reason are true, and reason is the correct explanation of assertion. 15. Chromoplasts are present in flowers, fruits or any other coloured part of the plant (other than green 6. (C) DNA & Protein part).Chloroplasts are present in leaves and stem of plant (green part).Leucoplasts are present 7. (D) Chloroplast changes to chromoplasts anywhere in plant as they are colourless and store food. 8. (C) Robert Hooke 16. The process in which the molecules are moved uphill against the concentration gradient. Active transport 9. (B) Plasmolysis always involves the expenditure of energy because the materials are pumped against the concentration 10. A solution having solute concentration lower than gradient. that of the cell sap is called hypotonic solution. Active transport Passive transport 11. Endocytosis is the ingestion or engulfment of It involves movement of It involves movement of food and other material by folding of the plasma molecules against the molecules along the membrane it as seen in Amoeba. concentration gradient concentration gradient It requires energy in the No energy is required. 12. Nucleus, also known as the brain of the cell, form ATP molecules. controls most of the activities of the cell because It is a rapid movement. It is a slow movement. it contains DNA (Deoxyribonucleic acid) which contains all the information of the cell. Movement of large Only small molecules or molecules occur by active water molecules are transport transported passively. 13. Cytosol fs the semifluid part of the cell cytoplasm which is embedded in between cell organelles. Cytoskeleton is a network of protein fibres present in the cell which provides a supporting PW Web/App - https://smart.link/7wwosivoicgd4 Library- https://smart.link/sdfez8ejd80if