InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Colourless plastids are known asA. leucoplastsB. chromoplastsC. chloroplastsD. none of the above |
| Answer» Correct Answer - A | |
| 2. |
If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen? |
| Answer» If the organisation of a cell is destroyed due to some physical or chemical influence then the cell will not be able to perform the basic functions like respiration, nutrition, excretion, etc. This may stop all the life activities and may result in its death. | |
| 3. |
Write the name of different plants parts in which chromoplast, chloroplast and Leucoplast are present. |
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Answer» Chromoplasts - Flowers and fruits. Chloroplasts - Green leaves and green parts of young stems. Leucoplasts - Root and underground stem. |
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| 4. |
Name the organelles which show the analogy written as under (i) Transporting chennels of the cell (b) Power house of the cell (c) Packaging and dispatching unit of the cell (d) Digestive bag of the cell (e) Storages sacs of the cell (f) Kitchen of the cell (g) Control room of the cell |
| Answer» (a) - Endoplasmic reticulum , (b) - Mitochondria , (c) - Golgi apparatus , (d) - Lysosome , (e) - Vacuole , (f) - Chloroplast , (g) - Nucleus. | |
| 5. |
Why is the plasma membrane called a selectively permeable membrane |
| Answer» Plasma membrane called a selectively permeable membrane because it regulates the movement of substances in and out of the cell, This means that the plasma membrane allows the entry of only some substanes and prevents the movement of some other materials. | |
| 6. |
(a) Is the cell wall in a plant cell living or non-living ? (b) Is the cell wall in a plant cell permeable or selectively permeable ? (c) What is its chemical composition ? |
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Answer» (a) A plant cell wall is non-living. (b) It is permeable. (c) Plant cell wall is chiefly composed of insoluble fibrous polysaccharide, cellulose (carbohydrate). Centain other compounds (hemicellulose, pectins and proteins) also occur in the cell wall. |
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| 7. |
Kitchen of the cell isA. MitochondriaB. endoplasmic reticulumC. chloroplastD. Golgi apparatus |
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Answer» Correct Answer - C Chloroplasts passess photosynthetic pigment called chlorophyll which can trap sunlight which is converted into chemical energy of organic compounds during photosynthesis. |
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| 8. |
The cell wall of which of these is not made up of celluloseA. BacteriaB. HydrillaC. Mango treeD. Cactus |
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Answer» Correct Answer - A In bacteria, cell wall is composed of peptidoglycan. |
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| 9. |
How are chromatin, chromatid and chromosomes related to each other? |
| Answer» Chromatin occurs as diffuse network of fine filaments in non-dividing nucleus. At the time of cell divison, chromatin material becomes condensed into rod-like structures called chromosomes. Each chromosome has a centromere and two arms called chromatids. | |
| 10. |
Give two major differences between prokaryotes and eukaryotes. |
| Answer» `{:("Prokaryotes","Eukaryotes"),("1. Nuclear material not bounded by nuclear","1. Nuclear material is present in nucleus"),( " envelope and lies directly in the cytoplasm."," bounded by well developed double-"),(," membrane nuclear envelope."),("2. Membrane-bound cell organelles are present.","2. Membrane-bound cell organelles are present."):}` | |
| 11. |
To prepare stained temporary mounts of (a) onion peel, and (b) human cheek cells and to record observations and draw their labelled diagram. Human cheek cells are commonly stained withA. safraninB. methylene blueC. acetocarmineD. eosine |
| Answer» Correct Answer - B | |
| 12. |
A cell will swell up ifA. the concentration of wate molecules in the cell is higher than the concentratio of water molecules in surrounding mediumB. the concentration of water molecules in sorrunding medium is higher than water molecules concentration in the cellC. the concentration of water molecules is same in the cell and in the surrounding mediumD. concentration of water molecules doen not matter |
| Answer» Correct Answer - B | |
| 13. |
The undefined nuclear region of prokaryotes are also known asA. nucleusB. nucleolusC. nucleic acidD. nucleoid |
| Answer» Correct Answer - D | |
| 14. |
Centrosome occurs inA. plant cellsB. animal cellsC. animal cells and some lower plant cellsD. all the above |
| Answer» Correct Answer - C | |
| 15. |
First living cells were observed byA. A.V. LeeuwenhoekB. Robert HookeC. R. VirchowD. Robert Brown |
| Answer» Correct Answer - A | |
| 16. |
Plasmolysis in a plant cell is defined asA. break down (lysis) of plasma membrane in hypotonic mediumB. shrinkage of cytoplasm in hypertonic mediumC. shrinkage of nucleoplasmD. none of them |
| Answer» Correct Answer - B | |
| 17. |
The proteins and lipids, essential for building the cell membrane, are manufactured byA. endoplasmic reticulumB. Golgi appartusC. mitochondriaD. peroxisomes |
| Answer» Correct Answer - A | |
| 18. |
Which out of the following is not a function of vacuole ?A. StorageB. Providing turgidity and rigidity of the cellC. Waste excretionD. Locomotion |
| Answer» Correct Answer - D | |
| 19. |
Root hairs of plants absorb wate from soil throughA. diffusionB. imbibitionC. osmosisD. all the above |
| Answer» Correct Answer - A | |
| 20. |
Silver nitrate solution is used to studyA. endoplasmic reticulumB. Golgi apparatusC. nucleusD. mitochondria |
| Answer» Correct Answer - B | |
| 21. |
Membrane which allows passage of only solvent through it isA. differentially permeableB. semipermeableC. impermeableD. both (a) and (b) |
| Answer» Correct Answer - A | |
| 22. |
Contractile vacuoles take part inA. absorption of water from outsideB. osmoregulationC. excretionD. both b and c |
| Answer» Correct Answer - B | |
| 23. |
How does an Amoeba obtain its food? |
| Answer» Amoeba acquires its food through endocytosis. Endocytosis refers to invagination of a small region of the plasma membrane, and ultimately forming an intra-celllular membrane-bound vesicle. This process is generally involved for the ingestion of food material. Intake of liquid food using endocytosis is called pinocytosis or cell drinking. Similarly, intake of solid particles by a cell through its cell membrane is called phagocytosis or cell eating. In this process, cell membrane puts up protoplasmic processes around the food particle. The processes join, fuse to form phagosome. | |
| 24. |
Lysosomes arise fromA. endoplasmic reticulumB. Golgi apparatusC. nucleusD. mitochondria |
| Answer» Correct Answer - B | |
| 25. |
Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell ?A. Golgi apparatusB. lysosmesC. somooth endoplasmic reticulumD. vacuoles |
| Answer» Correct Answer - C | |
| 26. |
Unicellular organismas take in oxygen and pass out carbon dioxide throughA. diffusionB. exosmosisC. endosmosisD. active transport |
| Answer» Correct Answer - A | |
| 27. |
Amoeba acquires its food through a process termed asA. exocytosisB. endocytosisC. plasmolysisD. exocytosis and endocytosis both |
| Answer» Correct Answer - B | |
| 28. |
Match the following columns `{:(Column I,Column II),(A."Smooth endoplasmic",1."Amoeba"),(B."Lysosome",2."Nucleus"),(C."Nucleoid",3."Bacteria"),(D."Food vacuoles",4."Detoxification"),(E."Chromation material and nucleolus",5."Suicidal bag"):}` |
| Answer» (a) - (iv) , (b) - (v) , (c) - (iii) , (d) - (i) , (e) - (ii). | |
| 29. |
Write atleast two precautions that you would take while performing the experiment "to make a temporary stained mount of human cheek cells." |
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Answer» (i) Take the scrap from inside of your cheek and using needle spread it evenly on the glass slide. (ii) Put the coverslip on the stained material carefully to avoid entry of air bubbles. |
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| 30. |
(a) Name the phenomenon which helps fresh water unicellular ofganisms (e.g., Amoeba) continuously gain water in their bodies. Also name the mechanism by which these organisms throw out excess of water from their bodies. (b) Give at least two examples in plants where similar phenomenon is used to gain of water : |
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Answer» (a) Fresh water unicellular organisms (e.g., Amoeba) continuously gain water in their bodies due to osmosis. These organisms have contractile vacuoles to throw out excess of water from their bodies. (b) (i) Absorption of water by the plant roots from the soil through root hairs occurs due to osmosis. (ii) In plants, cells, tissues and soft organs (leaves, young shoots, flowers) maintain turgidity due to osmotic absorption of water. |
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| 31. |
To prepare stained temporary mounts of (a) onion peel, and (b) human cheek cells and to record observations and draw their labelled diagram. In plant cells, nucleus is generallyA. cylindricalB. roundedC. discoidalD. elliptical |
| Answer» Correct Answer - B | |
| 32. |
To prepare stained temporary mounts of (a) onion peel, and (b) human cheek cells and to record observations and draw their labelled diagram. Cell wall in plant cells is made ofA. starchB. glycogenC. celluoseD. chitin |
| Answer» Correct Answer - C | |
| 33. |
Cell wall is composed of which chief material. How many molecules of glucose this material contains ? |
| Answer» Cellulose (carbohydrate). A cellulose molecule is a long, unbranched chain of about 6000 glucose molecules. | |
| 34. |
Name the layer of cementing material which holds adjacent plant cells. Where is it lacking ? |
| Answer» Middle lamella. It is lacking on the outer (exposed) side of the surface plant cells. | |
| 35. |
(a) Why does the plant cell, placed in a hypotonic solution, not burst ? (b) What happens when a fully turgid plant cell is placed in a hypertonic solution ? Name the phenomenon. |
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Answer» (a) A plant cell, when placed in a hypotonic solution, receives water by osmosis. It does not burst because it is surrounded by a rigid cell wall which can withstand the turgor pressure of the turgid cell contents. (b) When a fully turgid plant cell is placed in a hypertonic solution, the cytoplasm alongwith plasma membrane shrinks and separates from the cell wall as water flows out from the vacuole of the cell. This phenomenon is called plasmolysis. |
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| 36. |
Why does the skin of your finger shrink when you wash clothes for a long time? |
| Answer» We wash clothes with soap or detergent. The solution formed is hypertonic compared to concentration of our skin cells. Continuous washing of clothes with hands causes exosmosis in the skin cells resulting in flow of water from skin cells to outside. This results in shrinkage of skin over the fingers. | |
| 37. |
Name any cell organelle which is non-membranes. |
| Answer» Answer:- Ribosomes. | |
| 38. |
Cell arises from pre-existing cell was states byA. HaeckelB. VirchowC. HookeD. Schleiden |
| Answer» Correct Answer - B | |
| 39. |
What would happen if the plasma membrane ruptures or breaks down? |
| Answer» Plasma membrane is a selectively permeable membrane of the cell that maintains its homeostasis, i.e., constant internal chemical composition of the cell. If it ruptures or breaks down, the constant internat chemical composition of the cell will be lost and it will not be able to perform basic functions. | |
| 40. |
If you are provided with some vegetables to cook. You generally add salt into the vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this? |
| Answer» When salt is added, vegetables release water due to exosmosis. It is because the external medium becomes hypertonic as compared to the concentration inside the living cells of vegetables. | |
| 41. |
Who discovered cells, and how? |
| Answer» An English Botanistn, Robert Hooke discovered cells. In 1665, he used self designed microscope to observe cells in a cork slice. | |
| 42. |
What is the main function of each of the following organelles ? (a) Ribosome, (b) Cell wall |
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Answer» (a) Ribosomes are the sites of protein synthesis. (b) Cell wall provides shape, rigidity and protection to the cell. |
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| 43. |
____________ is present only in plant cells.A. plasma membraneB. cell membraneC. cell wallD. nucleus |
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Answer» Correct Answer - C |
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| 44. |
Cells were first discovered byA. Schleiden & SchwannB. Robert BrownC. Robert HookeD. Virchow |
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Answer» Correct Answer - C |
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| 45. |
Membrane bound organelles are found inA. eukaryotesB. prokaryotesC. both A and BD. none of these |
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Answer» Correct Answer - A |
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| 46. |
Nuclear membrane is _____________ layered.A. singleB. doubleC. tripleD. none of these |
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Answer» Correct Answer - B |
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| 47. |
______________ is the smallest cell of the human body.A. ovumB. nerve cellC. fat cellD. sperm |
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Answer» Correct Answer - D |
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| 48. |
______________ material is visible as entangled mass of threadlike structures.A. chromosomeB. genesC. chromatidsD. chromatin |
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Answer» Correct Answer - D |
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| 49. |
RER is rough as it contains theA. detoxification centresB. carbohydrate synthesizing machineryC. ribosomesD. lysosomes |
| Answer» Correct Answer - C | |
| 50. |
Which of the following is known as "physical basis of life" ?A. geneB. protoplasmC. nucleolusD. mitochondria |
| Answer» Correct Answer - A | |