__________ is the power house of the cell. B. D. Plasma membrane is bilayers of phospholipids with associated proteins and carbohydrates. What term describes the structure of a cell membrane? Nucleoplasm of nucleus contains thread-like structures called chromosomes. First, we must always recognize elaborate data of cell structure and its performance. When can chromosomes be seen? B. Cell and nuclear division; (8). (12). (d) organelles, Question 7. 9. D. the flip-flop of phospholipids to the opposite leaflet, (9). You can refer to NCERT Solutions forClass 8 Science Chapter 8 Cell Structure and Functions to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Before the invention of the microscope, the answer to this question was a well-kept secret. The basic structural and functional unit of all living organism is Question 5. Answer: Mitochondrial outer membrane. (16). 5 to 10 (d) none of them, Question 12. A. Phosphatidylethanolamine cell is a structural and functinal unit of organism. In addition to its role in inheritance, nucleus acts as control centre of the activities of the cell. C. Cellular inflammation Cell has major components .Each component has its own structure and perform certain functions of the cell on which the animal's life exists. C. mitochondria of all cells C. Phosphatidylcholine The main function of band 3 proteins in the plasma membrane of RBC is Answer: Let us look at the MCQ Questions of cell structure and MCQ Questions of function with answers. While studying living cells with microscope, why do we use stains ? 6. Beta What is a cork? Increase in saturated fatty acids in the membrane Membrane Structure and Function The membrane proteins that catalyze active transport reactions differ from soluble enzymes as the products of the reaction move in a specific direction they do not enhance the rates of reaction the substrates of the reaction are all outside the cell they are permanently changed during the reaction Selective uptake and export of ions and molecules; (2). MCQ Biostatistics MCQ Botany MCQ Zoology MCQ, Lecture NotesBiology PPTsVideo TutorialsBiology MCQQuestion BankDifference betweenPractical AidsMock Tests (Online)Biology Exams, MCQ on Plasma Membrane (Part 1 : Structure of Cell Membrane), D. Assisting in chromosome segregation, A. (d) all of these, Question 11. D. Ankyrin proteins. Maintains the semi-permeability of membrane, C. Maintaining the fluidity of membrane, D. Maintain the position of trans-membrane proteins in the membrane, B. cell, which is quite large that it can be seen by an unaided eye. In Fluid mosaic model, the biological membrane can be viewed as, A. two dimensional solutions of oriented lipids and globular proteins C. Plasma membrane is bilayers of proteins with associated lipids and carbohydrates. D. Channel pathway. This observation leads to the discovery of proteins in the membrane. 10 March 2021 by Dhruv Kumar. 14. (c) vacuoles C. Locomotion Muscular dystrophy, a devastating disease that cripple and kills children are caused by: A. Mutation in dystrophin Cells vary distinctly in their structure and function. When you cut your hair and nail, you do not feel pain. Difference in the amino acid sequence in the glycophorin, Learn more on: Membrane Lipids: Properties, Structure & Classification + PPT, 5. (b) bacteria The buildings, though built of similar bricks, have different designs, shapes and sizes. I. Outer leaflet of plasma membrane A. B. RNA replications and specialized enzymatic reactions Cell membranes are present in all plant and animal cells. B. cannot be made by higher organisms Maintaining the bilayer nature of membrane Question 1. A. C. Removing double bonds from fatty acids to increase the saturation of fatty acids C. Cellular inflammation. Answer: Presence of cardiolipin in the outer membrane of mitochondria is one of the strongest evidence for endosymbiont theory for the origin of mitochondria in eukaryotes. A group of similar cells is called tissue. A, C, D by simple diffusion and through aquaporins, 14. b) Proteins and Phospholipid Question 11. Introducing more double bonds in the fatty acyl chain of fatty acids D. Water cannot cross plasma membrane, (14). Increase in unsaturated fatty acids in the membrane, C. Increase in phospholipid content in the membrane, D. Increase in glycolipid content in the membrane, Membrane Lipids: Properties, Structure & Classification + PPT. Experiments demonstrating the importance of the nucleus in controlling the growth of the cell was performed in. B. is an integral membrane protein (c) organs. A, B The fluidity of plasma membrane increase with, A. Ans. Give example of a large cell. Define the term cytoplasm. A. Alpha D. 28 30 carbons, (11). 2. This is not the function of . Freeze fracture analysis and electron microscopy, A. (1). What about their shape and size ? Responding to external stimuli State whether the given statements are true or false. C. Maintaining the fluidity of membrane Why are we able to know a lot about cell structure today? Inner leaflet of plasma membrane He took thin slices of cork and observed them under a microscope. It is also known as the cell membrane. For this reason the cell is characterized as the basic structural and functional unit of life. Question 11. Bricks in buildings and cells in the living organisms are the basic structural units. Difference in the amino acid sequence in the Glycophorin, B. Chromosomes contain basic hereditary units called genes. Answer: (d) Vacuoles: Cells contain water-filled, sac-like structures called as vacuoles. Through aquaporins channel only Cell compartmentalization; (3). Carbohydrates layer in the cell membrane is called the glycocalyx. Please feel free to inform the Admin if you find any mistakes in the answer key.. Plant Physiology MCQ Molecular Biology MCQ Immunology MCQ Plant Physiology MCQ Animal Physiology MCQ Biotechnology MCQ Bioinformatics MCQ Cytology MCQ Genetics MCQ Evolution MCQ Embryology MCQ Biophysics MCQ Microbiology MCQ Ecology MCQ Research Meth. A. C. Carbohydrates moieties of glycophorin A in RBC membrane contain sialic acid residues A. Flexion All cells are enclosed by a cell membrane. A, B, C, D, E cell sap. Cytoplasm is another organelle of . Question 6. Question 7. 7.Name the cells which do not have well - defined nuclear membrane. Question 15. 5. The average thickness of plasma membrane of a eukaryotic cell is: A. B. Ans. 1. It is composed of a lipid bilayer with proteins embedded in it. The smooth endoplasmic reticulum (SER) is the site of, A. phospholipid synthesis C. Alpha and beta Increase the durability of plasma membrane They are called multicellular. (b) cells Always face outward to extracellular space, C. Always face to the lumen of cells, D. Directed to all sides in the membrane randomly, A. (a) nuclear membrane. C. Lateral diffusion The hens egg is an example of large. C. Spectrin Robert Hooke in 1665 observed slices of cork under a simple magnifying device. C. Difference in folding pattern of Glycophorin B. internal energy B. out of the cell across the plasma membrane into the intracellular space Always face outward to extracellular space (2). What are the components present in cytoplasm? Answer: (c) nucleoplast This structure has two layers, and is represented in the diagram below. Which of the following events in a biological membrane would not be energetically favorable and therefore not occur spontaneously? Question 9. (10). B. hydrophobic These carry genes and help in inheritance. (d) nerve cell. c They coordinate to produce the cell. MCQs On Cell Structure and Function Your body contains trillions of cells that all have specific functions and jobs to perform, making the human body a complex organism. Question 2. What was the observation of a part of the bark of a tree (cork) by Robert Hooke? Which of the following is NOT the function of plasma membrane? These components include cell membrane, cell wall, cytoplasm, nucleus, and also cell organelles. B. Rotation For example, nerve cells, both in the elephant and rat, are long and branched. (b) Mitochondria: Mitochondria are the powerhouses of the cell because energy is released from the mitochondria after respiration. C. Spectrin protein B. Myelin sheath of nerve cells D. Phagocytosis by macrophages. D. none of these, 12. Ans. Question 5. It is the membrane found in all cells that separate the interior of the cell from . Answer: Cell walls is found in C. keeps membranes fluid. How are cells in the living organisms arranged? Question 7. (e) Plastid. It includes theories, descriptions, discoveries, diagrams, definitions, explanation of differences and relations. The structure of the cell membrane is described by the fluid mosaic model, a universally accepted model of the plasma membrane. B. Phosphatidylserine C. The byproduct of given reactions in (b) is toxic to cells Peripheral proteins of plasma membrane (a) Cells can be easily seen with naked eyes. Answer. Cell in Latin means hollow space. B. Anchoring F0 particles of ATP synthase in the plasma membrane, The four major phospholipis of mammalian plasma membrane are: (1). 1. D. B, D, (3). Name the parts of the nucleus and state its function. Choose the correct option. A. Mitochondria. A, B D. Cannot be predicted, it varies according to cell types. C. A, D The cells having nuclear material without nuclear membrane are termed prokaryotic cells. The molecular basis of MN blood group in human is, A. B. Surface tension of plasma membrane is less than pure lipid structures. The jelly-like substance found between the nucleus and the cell membrane is called cytoplasm. (d) nucleolus, Question 3. Answer: He coined the term cell for each box. E. Cholesterol is absent in bacterial plasma membrane, Which of the above statements are correct? Which is a general property . Difference in the amino acid sequence in the Glycophorin D. C, D, 3. 4. (C). The fundamental structure of the membrane is the phospholipid bilayer, which forms a stable barrier between two aqueous compartments. Increase the permeability of plasma membrane Answer: A. Clarification: Transmembrane proteins act as channels from the intracellular and extracellular transport of ions and molecules. C. Atomic force microscopy Increase in unsaturated fatty acids in the membrane Question 9. Today, we know a lot about cell- structure and its functions because of the improved microscopes having higher magnification. (ii) Cytoplasm (b) multicellular organism Cell Structure and Functions Class 8 MCQs Questions with Answers. C. Mutation in glycophorin A C. Energy transduction Answer: They are found in multicellular organisms. Ans. Biochemical analysis of a plasma membrane sample showed about 20 -25% cardiolipin content (a type of membrane lipid). Both bricks in the building and cells in the living organisms are basic structural units. Ans. A. Cell biology deals with the study of the structure and functions of cells. (b) plastids (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. Answer: The flip-flop of phospholipids to the opposite leaflet, 11. The cell membrane is a living part of the cell. d) Their actions maintain a membrane potential with a value often of approximately -60 mV; the interior of the . The Test: Cell Structure & Functions- 2 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Cell Structure & Functions- 2 MCQs are made for UPSC 2022 Exam. This living substance is called protoplasm. Microfilaments are composed mainly of a protein called. Cell membrane. The liquid material in the nucleus is Answer: Consider the following statements: Cholesterol is somewhat amphipathic due to. B. Glycophorin B Stains (dyes) are used to colour the parts of the cell to observe and study their detailed structure clearly under microscope. A. Components of cells are enclosed in a membrane ealled cell membrane. 3. D. spans the thickness of the bilayer, 5. Difference in the carbohydrate sequence in Glycophorin, C. Difference in folding pattern of Glycophorin, D. Difference in the distributional pattern of band 3 and glycophorin proteins in the plasma membrane of RBC, A. Anchoring specific ion channels in the plasma membrane, B. Anchoring specific ion exchangers in the plasma membrane, C. Anchoring specific ion transporters in the plasma membrane, D. Anchoring Fo particle of ATP synthase in the plasma membrane, A. (a) nucleus C. Plasma membrane is bilayers of proteins with associated lipids and carbohydrates. Its main function is to separate the interior and exterior of the cell. nerve cell. Gases such as oxygen and carbon dioxide cross the cell membrane by a) passive diffusion through the lipid bilayer b) primary active transport c) specific gas transport proteins d) secondary active transport 2.Carrier proteins take part in a)Water transport b)Active transport of ions (a) nuclear membrane Nucleus is separated from cytoplasm by. Endoplasmic reticulum and Golgi bodies. Question 8. Quiz: The Cell and Its Membrane. 250 b. What is its role? Define the function of following: Difference in the carbohydrate sequence in Glycophorin 8. 2 10 % by weight The cell membrane controls the movement of substances in and out of cells and organelles while protecting the cell from its surrounding. Recognition (d) WBC, Question 8. Question 7. D. protein synthesis. 2. A. Intercellular interactions The main function of cell membrane is to regulate the movement of molecules in and out of the cell. MCQ Questions for Class 6 Science Chapter 4 Sorting Materials Into Groups, MCQ Questions for Class 6 Science Chapter 5 Separation of Substances, The Face On The Wall Textbook Questions And Answers Class 8 ICSE English literature, KSEEB SSLC Class 10 English Solutions Karnataka State Syllabus, KSEEB Solutions for Class 7 English Poem Chapter 1 The Gymnastic Clock KSEEB Solutions, KSEEB Solutions for Class 7 English Prose Chapter 2 Avoid Plastics KSEEB Solutions, KSEEB Solutions for Class 7 English Prose Chapter 1 Healthy Life KSEEB Solutions, KSEEB Solutions for Class 7 English Karnataka State Syllabus KSEEB Solutions, KSEEB Class 8 English Comprehension Passages KSEEB Solutions, KSEEB Class 8 English Letter Writing KSEEB Solutions, KSEEB Class 8 English Paragraph Writing KSEEB Solutions, KSEEB Solutions for Class 8 English Supplementary Chapter 20 Study Skills KSEEB Solutions, KSEEB Solutions for Class 8 English Supplementary Chapter 19 The Miser KSEEB Solutions. D. All of these methods, A. Answer: (D). Practice Class 8 Science MCQ Questions chapter-wise 1. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online . What is meant by cell in Latin? Mitochondria and chloroplasts. The best method to study the properties of integral membrane proteins in the plasma membrane is, A. Cryo-sectioning and electron microscopy The kitchen of plant cell is __________. The polar portion of cholesterol is facing external to the membrane They are large-sized in plant cells while either absent or small-sized in animal cells. These organs together constitute different systems in living beings and perform different functions. Which of the following is NOT the function of plasma membrane? Exchange of chloride ion (Cl-) with bicarbonate ions Protoplasm is __________ inside the cell. D. Difference in the distributional pattern of band 3 and glycophorin proteins in the plasma membrane of RBC, (4). To observe the cell by microscope, sometimes an organ has to be cut into sections to observe various smaller components. List some of the basic functions carried out by all living organisms. amoeba (d) The vacuole contains: water. Cytoplasm is a fluid present between the cell membrane and the nucleus and is made up of basic elements like carbon (C), hydrogen (H), oxygen (O) and nitrogen (N). Cork is a part of the bark of a tree. 6. (a) vacuoles B. What is nucleolus? d They are small sized and mostly internal. (d) cell membrane. Assisting in chromosome segregation, Learn more on: Membrane Lipids: Properties, Structure & Classification + PPT, Functions of plasma membrane: (1). (a) chromosomes Cholesterol is somewhat amphipathic due to, A. the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule B. amino acid synthesis Membranes are highly fluid, dynamic structures consisting of a lipid bilayer and associated proteins. Yes, egg of a hen represents a single cell and is big enough to be seen by unaided eye. Surface tension of plasma membrane is more than pure lipid structures C. Mutation in Glycophorin A protein of RBC (d) The size and shape of cells is uniform in multicellular organisms. D. Lock and Key model, 6. Describe the differences and similarities between cell and brick. c) They indirectly control the volume of the cell. Glycolipids in plasma membrane are usually located at: A. (c) cytoplasm D. none of these, 9. What structural features of a membrane are major contributors to its selective permeability? 5 to 10 nm B. Phosphatidylserine, and (4). Answer: Every living thing is made up of cells and a cell represents the lowest level of organization at which life can exist. MCQs on Cell Structure and Function Cell forms the structural, functional and biological units of living entities. B. Trans-membrane proteins Nucleus is separated from cytoplasm by B. the long branched hydrocarbon along with the four hydrocarbon rings. (d) all of these, Question 5. (iii) Nucleus. 50 c. 750 d. 500: B But, cells in the living organisms are complex living structures unlike non-living bricks. 10. MCQ on Cell Organelles is becoming the most common part of today's competitive examinations. B. Reshuffling the chain between different phospholipid molecule to produce lipids with two unsaturated fatty acids Cell Membrane: A Fluid Mosaic Model. The endomembrane system. This membrane provides shape to the cells in plants and animals. Does egg of a hen represent a single cell ? (d) lysosome, Question 9. Question 1. (D). D. Reception, (18). Increase in unsaturated fatty acids in the membrane. Cell Membrane Structure The Cell membrane consists of both lipids and proteins. B. the rotation of phospholipids The plasma membrane has selective permeabilities and acts as a barrier, thereby maintaining differences in composition between the inside and . Plasma membrane is composed of two layersone layer of phospholipids and one layer of proteins. C. Exchange of H+ ions with biocarbonate ions Answer. C. Evenly distributed in both inner and outer leaves of plasma membrane Question 10. The cleavage of spectrin network in the cell by the proteolytic enzyme calpane indicate: A. Apoptosis of cell. What is tissue? Exchange of chloride ion (Cl-) with bicarbonate ions, B. 18 20 carbons (D). Plasma/Cell Membrane The plasma/cell membrane is the outermost layer of a cell. Is there any relation between the size of the body of the animal or plant with the size of the cell? Answer: D. Plasma membrane is bilayers of phospholipids with associated proteins and carbohydrates. A. The chromosomes can be seen only when the cell divides. Question 9. Ans. C. Decrease the durability of plasma membrane The model that is now known to be correct for the structure of biological membrane is, A. Fluid mosaic model Cell Structure and Functions Class 8 MCQs Questions with Answers Choose the correct option. A. They lack nucleus and other membrane structures, C. Carbohydrates moieties of glycophorin A in RBC membrane contain sialic acid residues, D. Amino acids in the peripheral portion of glycophorin A are negatively charged, A. Cryo-sectioning and electron microscopy, B. D. Band 3 protein, (8).