C. Phosphatidylcholine At physiological conditions, cholesterol in the plasma membrane: What is tissue? (b) multicellular organism (c) nucleoplast (7). (a) tissue The liquid material in the nucleus is. Question 1. What is the size of cells in living organisms. 4. What is nucleolus? The most abundant phospholipid component in the bacterial cell membrane is Cell Structure A cell structure is composed of individual components with specific functions important to carry out the processes of life. How many cells are there in a human body ? Quiz: Chemical Reactions in Metabolic Processes. Question 9. D. Mitochondrial outer membrane. Nucleus is separated from cytoplasm by. Ans. How do cells/groups of cells perform different functions in multicellular organisms? (B). C. A, C, D, E The polar portion of cholesterol is facing external to the membrane (d) WBC, Question 8. C. Removing double bonds from fatty acids to increase the saturation of fatty acids (c) organisms A cell consists of 3 parts: the cytomembrane, the nucleus, and, between the 2, the protoplasm. Ans. Yes, egg of a hen represents a single cell and is big enough to be seen by unaided eye. The answer key is prepared with best of our knowledge. It is also called the plasma membrane. Question 4. (A). Question 1. We hope the given NCERT MCQ Questions for Class 8 Science Chapter 8 Cell Structure and Functions with Answers Pdf free download will help you. These are found in the form of chemical substances like carbohydrates, proteins and water. The genetic disorder hemolytic anemia is caused by A. Mutation in spectrin and ankyrin genes B. Mutation in band 3 protein of RBC C. Mutation in Glycophorin A protein of RBC D. Mutation in Glycophorin B protein of RBC 15. The major function of the cell wall is to provide rigidity, tensile strength, structural support, protection against mechanical stress and infection. Define the term cytoplasm. B. Myelin sheath of nerve cells The cytoplasm and nucleoplasm make up the protoplasm. D. the three . D. all of the above, 3. Today we know that the cell is the smallest unit of life that can feed, breathe, reproduce, etc. Define the terms tissue and organ. Answer: The flip-flop of phospholipids to the opposite leaflet, 11. C. mono-saccharide and protein Describe their functions. B. Mutation in band 3 protein of RBC Movement of Substances. Ans. 14 The jelly like substance present inside the cell is known as: a Cytoplasm. Plasma membrane is composed of equal numbers of phospholipids, proteins, and carbohydrates. They perform the same function of transferring messages in bigger as well as in the smaller organism. (d) nucleolus, Question 3. Does egg of a hen represent a single cell ? 1. Answer: Question 14. The buildings, though built of similar bricks, have different designs, shapes and sizes. D. Flip-flop, (5). 4. Answer: Without basic knowledge of Cell Organelles Aspirants lag behind in these examinations. Surface tension of plasma membrane is less than pure lipid structures (b) nucleolus Question 7. A. the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule. [WpProQuiz 18] List some of the basic functions carried out by all living organisms. I. (a) Cells can be easily seen with naked eyes. Enzymes such as desaturase, phospholipase and acetyltransferase are very essential for maintaining the integrity of plasma membranes. Mitochondrial outer membrane. (c) nucleoplasm Human erythrocytes cell membrane Difference in the carbohydrate sequence in Glycophorin vacuole. B. It is the membrane found in all cells that separate the interior of the cell from . (b) plastids The cleavage of spectrin network in the cell by the proteolytic enzyme calpane indicate: Take some short notes and follow tricks and methodology . It being porous, allows movement of substances or materials both inwards and outwards of the cell. Placement of cholesterol molecules in the membrane interfere the flexibility of lipids hydrocarbon chain, C. Cholesterol provide stiffness to membrane, D. Cholesterol is absent in plasma membrane of plants, E. Cholesterol is absent in bacterial plasma membrane. B. While studying living cells with microscope, why do we use stains ? Nucleus is separated from cytoplasm by (a) nuclear membrane (b) nucleoplasm (c) organs (d) cell membrane Answer Question 2. D. Increase in glycolipid content in the membrane, 2. D. All of these methods, A. Maintaining the bilayer nature of membrane Cholesterol is somewhat amphipathic due to, A. the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule An important domain of ankyrin protein which binds to apoptosis inducing proteins of the cells is: Answer: Answer: (c) single cells What constitutes cytoplasm? This living structure is responsible for keeping individuality and also acts as a barrier from unwanted intruders. The basic structural and functional units of all the organs of the living organisms is called cell. (d) nucleus, Question 13. 10. B. Ans. Answer: Question 2. D. Reshuffling the chain between different phospholipids molecules to produce lipids with saturated fatty acids, A. A, B, C, D, E Cells which lack nuclear membrane are B. is an integral membrane protein Which of the following is NOT the function of plasma membrane? Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online . The structure present in a eukaryotic cell but absent in prokaryotics cells is MDCAT 2019 a. Nucleus b. DNA c. Ribosomes d. Cell surface membrane : If 15 m size object is observed under light microscope using 5x eyepieces and 10x objective, its magnified image size will be: MDCAT 2019 a. The hens egg is an example of large. (d) none of these, Question 14. C. Decrease the durability of plasma membrane The cells in the living organisms are arranged in the similar manner as bricks are arranged to make a building. MCQ on Cell Structure and Functions with Answers: How small do you imagine an organism can be? The polar portion of cholesterol is facing external to the membrane, B. (c) cell membrane A. Difference in the amino acid sequence in the Glycophorin (d) cell membrane. 1. Cell Biology MCQs A cell is the structural and functional unit of life. Answer: red blood cell. Organelles in eukaryotic cells. Ans. centrosome. What structural features of a membrane are major contributors to its selective permeability? (c) size Question 5. Answer. The boundary of cell is called as cell membrane and it is also known as plasma membrane. The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. (a) chromosomes Maintaining the bilayer nature of membrane, B. 4. Cell compartmentalization; (3). They lack nucleus and other membrane structures b Ectoplasm. When can chromosomes be seen? Answer: All cells are enclosed by a cell membrane. A. Phospholipid bilayer Chromosomes are found in Protoplasm is __________ inside the cell. Cell wall is a tough, rigid layer that surrounds some types of cells (plants and some bacterial cells). 14. Answer: A. Clarification: Transmembrane proteins act as channels from the intracellular and extracellular transport of ions and molecules. Genes are located in Cholesterol is somewhat amphipathic due to. The molecular basis of MN blood group in human is For example, nerve cells, both in the elephant and rat, are long and branched. The cell in a living organise is the basic structural unit. This structure has two layers, and is represented in the diagram below. (d) vacuole, Match the items given in column I suitably with those given in column II. Answer: The cell in a living organise is the basic structural unit. How do we observe the cell by microscope? D. none of these, 9. Answer: C. Carbohydrates moieties of glycophorin A in RBC membrane contain sialic acid residues C. RNA replications and specialized cyclic reactions Just as a . What are basic structural units in buildings and living organisms ? 5. (a) Plasma membrane Question 1. Question 1. What is the size of red blood cells (RBCs) found in the human body? D. Mutation in Glycophorin B protein of RBC, (15). D. Mutation in ankyrin. B. Increase in unsaturated fatty acids in the membrane What are the components present in cytoplasm? He took thin slices of cork and observed them under a microscope. (D). The molecular basis of MN blood group in human is, A. The blood group of the person will be. C. Maintaining the fluidity of membrane Exocytosis is the secretion of proteins, A. out of the cell across the plasma membrane into the extracellular space Answer: Always face inward to the non-polar portion of membrane, B. D. the products of the reaction move in a specific direction, 11. It is also known as the cell membrane. Cell membrane surrounds the cell . Is cell wall present or absent in animal cell? The (hydrophobic) tails of these phospholipids face each other. Maintaining the fluidity of membrane, 16. Stains (dyes) are used to colour the parts of the cell to observe and study their detailed structure clearly under microscope. 14. B. integral proteins D. None of the above, A. Peroxisomes have a single boundary membrane Cork is a part of the bark of a tree. The membrane proteins that catalyze active transport reactions differ from soluble enzymes as, A. they are permanently changed during the reaction Which part of the cell gives shape to it? Cell Membrane Guided Notes: https://etsy.me/34iZyb9This video reviews the structure and function of the cell membrane. The fundamental structure of the membrane is the phospholipid bilayer, which forms a stable barrier between two aqueous compartments. D. the three six-membered rings along with the single five-membered ring, A. absorbs light and pumps protons 8. Answer: D. Lock and Key model, 6. NEET MCQ Plasma Membrane PDF:-Download the PDF Here. B. internal energy (d) none of them, Question 12. B. Plastids. How do we observe the cell by microscope? (ii) Cytoplasm contains the cell organelle, which performs different functions. A. by simple diffusion only This will be achieved by: Biochemical analysis of a plasma membrane sample showed about 20 -25% cardiolipin content (a type of membrane lipid). 13. (C). C. vibrational energy Question 10. Chloroplast i.e., the green plastids contains chlorophyll for the process of photosynthesis. Question 13. D. aminoacid and carbohydrate, A. DNA replication and specialized enzymatic reactions Exchange of chloride ion (Cl-) with bicarbonate ions, B. Increase in saturated fatty acids in the membrane Muscular dystrophy, a devastating disease that cripple and kills children are caused by: A. Mutation in dystrophin D. C, D, 3. C. Anchoring specific ion transporters in the plasma membrane Cell Membrane Structure The Cell membrane consists of both lipids and proteins. According to this model, the cell membrane is considered as a liquid having two surfaces. D. Exchange of H+ ions with Cl- ions, (10). They are large-sized in plant cells while either absent or small-sized in animal cells. These are mitochondria, golgi bodies, ribosomes, etc. Here you can practice a quiz on cell biology, MCQ quiz on cell biology with answers completely chapter-wise. B. nucleus. 1. B. the substrates of the reaction are all outside the cell (a) Plasma membrane: It is the outer covering of the cell which separates its contents from the surrounding medium. Anchoring of the cytoskeleton; (5). Cell Membrane is composed of_____ a) Proteins and cellulose. C. 30 50 % by weight Difference in the amino acid sequence in the glycophorin, Learn more on: Membrane Lipids: Properties, Structure & Classification + PPT, 5. Read more>> Adhesion of cells to each other and to the extracellular matrix, 3. A. Alpha If you have any queries regarding Cell Structure and Functions CBSE Class 8 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon. Tissue is a group of similar cells performing a specific function. __________ is the power house of the 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 Ans. Practice daily gk quiz online quiz test at examstudylive.com to makes your static gk ability faster. The jelly-like substance found between the nucleus and the cell membrane is called cytoplasm. The endomembrane system. (b) nucleoplasm First, we must always recognize elaborate data of cell structure and its performance. The blood group of the person will be, (15). Cell signaling; (7). Answer: Similar functions in multicellular organisms are carried out by groups of specialised cells forming different tissues which in turn form organs. Each organ in the system performs different functions. Exchange of chloride ions with bicarbonate ions, 13. A. the rotation of membrane proteins These boxes appeared like a honey-comb. The cell membrane is a living part of the cell. B. Glycophorins The empty blank looking structures in the cytoplasm is (d) cell membrane, Question 2. (1). It is absent. B. cannot be made by higher organisms State the size of the largest cell. Question 5. The kitchen of plant cell is __________. Surface tension of plasma membrane is more than pure lipid structures B. the rotation of phospholipids Answer: When you cut your hair and nail, you do not feel pain. We have provided Cell Structure and Functions Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Peripheral proteins of plasma membrane, B. Integral proteins of plasma membrane, C. Proteins which randomly binds to the lipids of plasma membrane, D. Proteins which binds to ion gated channels in the plasma membrane, A. Consider the following statements: Question 2. 11. Question 8. Question 11. 50 c. 750 d. 500: B Assisting in chromosome segregation, Learn more on: Membrane Lipids: Properties, Structure & Classification + PPT, Functions of plasma membrane: (1). Cell wall is an additional covering over the cell membrane in plant cells. But, cells in the living organisms are complex living structures unlike non-living bricks. Red blood cells in the blood repel each other due to: A. 4. Cells combine to form tissues and a group of tissues is called an organ. cell is a structural and functinal unit of organism. The smooth endoplasmic reticulum (SER) is the site of, A. phospholipid synthesis Plasma membranes form closed compartments around the cytoplasm to define cell boundaries. Increase the durability of plasma membrane (a) cell D. Phagocytosis by macrophages, (2). inside the protoplasm lie involved arrangements of fine fibers and a whole lot or perhaps thousands of minuscule but distinct structures known as organelles. What is the size of smallest cell? Which is a general property . (iii) Nucleus. D. All of the above, 15. Question 10. A. D. Plasma membrane do not have surface tension. 4.Name the organisms which are made up of more than one cell. A. Phosphatidylethanolamine A, B 12. The liquid material in the nucleus is (a) chromosomes (b) bacteria (c) nucleoplasm (d) nucleolus Answer Question 3. In addition to its role in inheritance, nucleus acts as control centre of the activities of the cell. What is its role? Question 2. C. Cholesterol provide stiffness to membrane 5 to 10 nm B. Carbohydrates layer in the cell membrane is called the glycocalyx. (a) chrpmosomes (12). Cell Structure And Function Class 8 MCQ Question 2. (b) nucleoplasm. 7. (b) cell wall (c) plasma membrane Choose the correct option. (d) organelles, Question 7. D. 28 30 carbons, (11). (c) organism A. Intercellular interactions __________ is the process of making food in plants. (8). A, C 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. Water can pass the plasma membrane: Through aquaporins channel only Answer: (e) Plastids: The coloured bodies in the cytoplasm of the cells are called plastids. C. Lac Operon model D. Maintain the position of trans-membrane proteins in the membrane, (14). (a) chlorophyll The size of cells in living organisms may be as small as a millionth of a metre or a few centimetre. (c) A single cell can perform all the functions in a unicellular organism. C. mitochondria of all cells Cell membrane and cytoplasm are included in the major components of the cell. The liquid material in the nucleus is (a) chromosomes (b) bacteria (c) nucleoplasm (d) nucleolus Answer Question 3. Increase the durability of plasma membrane, B. Why? D. the flip-flop of phospholipids to the opposite leaflet, (9). Question 1. C. the lateral movement of phospholipids Growth and development, movement, digestion, respiration, excretion, reproduction, etc. a) They use the free energy from the hydrolysis of ATP to transport K+ out the cell and Na+ into the cell. 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. Define the function of following: Cell Division. The average thickness of plasma membrane of a eukaryotic cell is: A. Question 2. Answer: B. A. Question 4. If the temperature of culture of bacterial is lowered, the cell responds metabolically to maintain the fluidity of membrane. Which of the following events in a biological membrane would not be energetically favorable and therefore not occur spontaneously? Answer: Every living thing is made up of cells and a cell represents the lowest level of organization at which life can exist. B. Trans-membrane proteins B. Similarly, in the living world, organisms differ from one another but all are made up of cells. food (d) chloroplasts, Question 15. Ans. Most probably the sample is from: C. Evenly distributed in both inner and outer leaves of plasma membrane, D. Cannot be predicted, it varies according to cell types, A. the rotation of membrane proteins, C. the lateral movement of phospholipids, D. the flip-flop of phospholipids to the opposite leaflet, A. (b) Mitochondria D. spans the thickness of the bilayer, 5. 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. b) They are tetramers, consisting of four equally sized polypeptide chains. C. Glycolipids on the outer surface of the membrane The movement of molecules across a membrane by passive transport does not require, A. an input of metabolic energy Words: 4,865; Pages: 14; Preview; Full text; PRACTICE TEST QUESTIONS PART A: MULTIPLE CHOICE QUESTIONS . C. 5 to 10 m (b) shape The __________ cell transfers the messages. Nucleus is separated from cytoplasm by. Examples are onion, cells and cheek cells. (b) Mitochondria: Mitochondria are the powerhouses of the cell because energy is released from the mitochondria after respiration. B. polysaccharide and protein Question 1. It is concerned with the life processes, signalling pathways, physiological properties, metabolic properties, chemical properties, and the interaction of cells with their surroundings. Exchange of K+ ions with Na+ ions MCQ on Cell Structure and Function: Biology is one of the most important and vital sections in NEET. Answer: Question 5. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced . Give example of a large cell. Plasma membrane is bilayers of phospholipids with associated proteins and carbohydrates, 6. (c) cytoplasm Cell Structure and Functions Class 8 MCQs Questions with Answers. Answer: To observe the cell by microscope, sometimes an organ has to be cut into sections to observe various smaller . Question 1. Increase in unsaturated fatty acids in the membrane. Human body has trillions of cells, which vary in shape and size on the basis of their functions. 1. B. 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. sphingomyelin, 9. The organisms with these kinds of cells are called prokaryotes (pro = primitive; karyon = nucleus). What are the projections in Amoeba called? A. Mutation in spectrin and ankyrin genes Always face inward to the non-polar portion of membrane (c) organs The shape and size of cell is related to its function. (a) vacuoles (c) A single cell can perform all the functions in a unicellular organism. A. This living substance is called protoplasm. Cells were first discovered by Robert Hooke in 1665. MCQ on Cell Organelles is becoming the most common part of today's competitive examinations. These are MDCAT MCQs in the Biology chapter of Cell Structure and function. B. Glycophorin B This cell is the longest in the human body (a) Muscle cells (b) Nerve cells (c) Bone cells (d) Gland cells Answer 2. Hence, it is called the structural unit of life. D. Peripheral membrane proteins on the inside of the membrane, (13). The white material is called albumin, and the yellow component is called yolk. Carbohydrates moieties of glycophorin A in RBC membrane contain sialic acid residues, 18. In Fluid mosaic model, the biological membrane can be viewed as, A. two dimensional solutions of oriented lipids and globular proteins Anchoring F0 particles of ATP synthase in the plasma membrane, The four major phospholipis of mammalian plasma membrane are: (1). Answer: Outer leaflet of plasma membrane It gives shape and rigidity. Question 7. Ans. The basic components of a cell are: Question 7. (a) nuclear membrane. C. Death domain The model that is now known to be correct for the structure of biological membrane is, A. Fluid mosaic model Describe the differences and similarities between cell and brick. Question 11. Largest cell visible to uniaded eye is: (a) hen's egg. E. Cholesterol is absent in bacterial plasma membrane, Which of the above statements are correct? The fluid mosaic model describes the structure of the plasma membrane as a mosaic of components including phospholipids, cholesterol, proteins, and carbohydratesthat gives the membrane a fluid character. C. A, D Microscope helped in studying the living cells. D. Water cannot cross plasma membrane, (14). The fluidity of plasma membrane increase with, A. 7. Organ: It is a group of tissues performing a specific function. Central domain (a) nucleus Let us study the detailed composition of this lipid bilayer and . B. Integral proteins of plasma membrane A group of similar cells is called tissue. Name two organisms which are made of single cell. Cell biology deals with the study of the structure and functions of cells. (d) nerve cell. 0.1 to 0.5 micrometre (mm). C. Exchange of H+ ions with biocarbonate ions Components of cells are enclosed in a membrane ealled cell membrane. Ans. D. Plasma membrane is bilayers of phospholipids with associated proteins and carbohydrates. B. C. The byproduct of given reactions in (b) is toxic to cells Robert Hooke in 1665 observed slices of cork under a simple magnifying device. (b) organ What term describes the structure of a cell membrane? (A). Answer: The cells having a well-organised nucleus with a nuclear membrane are designated as eukaryotic cells. C. Alpha and beta Let's study more about 'Cell membrane' by the following MCQs. MCQ.1): A biological part of the cell that . Both bricks in the building and cells in the living organisms are basic structural units. Question 1. The other name of cell membrane is MCQs on Cell Structure and Function 1. Nucleolus is a small, spherical, dense body in the nucleus. 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. Answer: Attempt it online for free. Ans. B. Is there any relation between the size of the body of the animal or plant with the size of the cell? More details. Cell Structure and Functions Class 8 Extra Questions and Answers Science Chapter 8 PDF are solved by experts and will guide students in the right direction. A. C. Locomotion Which of the following statements best describes the chemical composition of plasma membrane? Cell wall (b) The organelle that controls all activities in. Test: Cell Structure & Functions- 2 for UPSC 2022 is part of Science & Technology for UPSC CSE preparation. Surface tension of plasma membrane is less than pure lipid structures, C. Surface tension of plasma membrane and pure lipid structures are same, D. Plasma membrane do not have surface tension. Increase in saturated fatty acids in the membrane, B. Answer: C. By simple diffusion and through aquaporins C. Difference in folding pattern of Glycophorin Cytoplasm, along with nucleus, forms the living substance of a cell. 6. C. Plasma membrane is bilayers of proteins with associated lipids and carbohydrates. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. If so, then check out this ' membrane structure and function quiz' that is given below. B. Always face outward to extracellular space, 13. Phosphatidylcholine, (2). (d) all of these, Question 11. C. carbohydrate synthesis Question 11. This tissue includes the blood tissue (a) Muscle tissue (b) Connective tissue (c) Epithelial tissue (d) Nervous tissue Answer 3. This observation leads to the discovery of proteins in the membrane. (1). The main function of cell membrane is to regulate the movement of molecules in and out of the cell. What is the name of organism made of more than one cell? Ans. The main role of carbohydrates in the cell membrane is, A. Adhesion Introducing more double bonds in the fatty acyl chain of fatty acids d) Their actions maintain a membrane potential with a value often of approximately -60 mV; the interior of the . Each and every cell present in the body is enclosed by a bubble-like structure called a cell membrane. B. Pages model by simple diffusion and through aquaporins, 14. (a) nucleus (c) organs. A single-celled organism captures and digests food, respires, excretes, grows and reproduces with its single cell. 8. (1). The reduction in the surface tension of membrane than pure lipid structures is due the presence of proteins in the plasma membrane. Ans. (a) nuclear membrane. (D). Carbohydrates in the plasma membrane: A. C. carbohydrates Plastid. To observe the cell by microscope, sometimes an organ has to be cut into sections to observe various smaller components. The basic structural and functional unit of all living organism is Ans. C. Evenly distributed in both inner and outer leaves of plasma membrane In active transport, the membrane structure that functions is, A. cholesterol Answer: 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. (b) prokaryotic cells The function of nucleolus is to assemble ribosomes. Question 6. Through this process, plant cell prepares food which is ultimately stored in the form of starch. Why are we able to know a lot about cell structure today?
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