1071 + Interview Questions in CELL IN GENERAL AWARENESS Page 6 InterviewSolution

251.	Which of the following components provides sticky character to the bacterial cellA. Cell wallB. Nuclear membraneC. Plasma membraneD. Glycocalyx
Answer» Correct Answer - D Glycocalyx is the outer most mucilage layer of the cell envelope . It gives sticky character to the bacterial cell.

Discussion

252.	Water soluble pigments found in plant cell vacuoless areA. chlorophyllsB. carotenoidsC. anthocyaninsD. xanthophylls
Answer» Correct Answer - C Anthocyanins are water soluble vacuolar pigments that may appear red , purple or blue depending on pH . It is impermeable to cell membrane of plants and can leak out only when membrane is damaged or dead.

Discussion

253.	Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?A. LysosomeB. RibosomeC. ChloroplastD. Mitrochondrion
Answer» Correct Answer - D Mitochondria is referred as power house of the cell . It contains the enzymes for cellular respiration . It oxidises carbohydrate to produce ATP molecules in the process of aerobic respiration . Thinking process Mictochondria is a double membrane bound semi-autonomous cell organelles . The number of mitochondria per cell is more in metabolically active cells.

Discussion

254.	Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?A. RibosomeB. ChloroplastC. MtiochondriaD. Lysosome
Answer» Correct Answer - C Mitochondrion is responsible for extracting energy from carbohydrates to form ATP.

Discussion

255.	Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?A. RibosomeB. ChloroplastC. MitochondrionD. Lysosome
Answer» Correct Answer - C

Discussion

256.	Which is the suitable technique to obtain correct information regarding the location and synthesis of new DNA?A. Electron microscopyB. X-ray crystallographyC. ImmunoelectrophoresisD. Use of radioactive precursors of DNA and autoradiography
Answer» Correct Answer - D

Discussion

257.	Addition of new cell wall particles amongst the existing ones isA. depositionB. appositionC. intussusceptionD. aggregation
Answer» Correct Answer - B Apposition or accretion is defined as the addition of new cell wall particles amongst the existing one, such as deposition of secondary wallsm layers from outside over the existing primarywall. Intussusception can be demonstrated as the internal growth of the primary wall which occursduring the growth period of the cell resulting in theincrease in volume of cell wall. Deposition Molecules settling out of a solution . Aggregation Direct mutual attraction between particles or Aggregation of soil granules to form soil structme.

Discussion

258.	Assertion. A Chromatin fibre is a chain of nucleosomes. Reason. Glyoxysomes are found in the plant cells only.A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. If Assertion is true but Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - B

Discussion

259.	New cells generate fromA. Bacterial fermentationB. Regeneration of old cellsC. Pre-existing cellsD. Abiotic materials
Answer» Correct Answer - C

Discussion

260.	Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based onA. Membrane potentialB. Accumulation of Na ionsC. Accumulation of `K^(+)` ionsD. Proton gradient
Answer» Correct Answer - D

Discussion

261.	Assertion : Mitochondria and chloroplasts are semiautonomous organelles. Reason : They are formed by division of pre-existing organelles as well as contain DNA but lack protein synthesizing machineryA. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertion.C. If the assertion is true but reason is false.D. If the assertion and reason are false.
Answer» Correct Answer - C

Discussion

262.	New cells generate from (a) bacterial fermentation (b) regeneration of old cells (c) pre-existing cells (d) abiotic materials
Answer» (c) According to the biogenic theory, new cells can only arise from pre-existing cells. Only complete cells, in favourable conditions, can give rise to new cells.

Discussion

263.	Assertion. Mitochondria and chloroplasts act as energy transducers in the cells. Reason. They make biologically useful energy available to the cells.A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. If Assertion is true but Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - B

Discussion

264.	Assertion. Mitochondria are known as the power houses of the cell. Reason. Mitochondria generate biologically useful energy (ATP) for the cell activities by oxidation of fuel.A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. If Assertion is true but Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - A

Discussion

265.	The outermost covering of animal cell is A) cell wall B) plasma membrane C) nuclear membrane D) nucleolar envelop
Answer» B) plasma membrane

Discussion

266.	Primarily cells are studied under A) optical microscope B) compound microscope C) electron microscope D) none
Answer» A) optical microscope

Discussion

267.	List out the features of Cell Doctrine.
Answer» The features of cell doctrine are as follows: 1. All organisms are made up of cells. 2. New cells are produced from the pre – existing cells. 3. Cell is a structural and functional unit of all living organisms. 4. A cell contains hereditary information which is passed on from cell to cell during cell division. 5. All the cells are basically the same in chemical composition and metabolic activities. 6. The structure and function of cell is controlled by DNA. 7. Sometimes the dead cells may remain functional as tracheids and vessels in plants and horny cells in animals.

267.

List out the features of Cell Doctrine.

Answer»

The features of cell doctrine are as follows:

1. All organisms are made up of cells.

2. New cells are produced from the pre – existing cells.

3. Cell is a structural and functional unit of all living organisms.

4. A cell contains hereditary information which is passed on from cell to cell during cell division.

5. All the cells are basically the same in chemical composition and metabolic activities.

6. The structure and function of cell is controlled by DNA.

7. Sometimes the dead cells may remain functional as tracheids and vessels in plants and horny cells in animals.

Discussion

268.	Enumerate the properties of protoplasm.
Answer» The properties of protoplasm: 1. Protoplasm is translucent, odourless and polyphasic fluid. 2. It is a crystal colloid solution which is a mixture of chemical substances forming crystalloid and colloidal solution. 3. Protoplasm exhibits three Brownian movement, amoeboid movement and cytoplasmic streaming or cyclosis. Viscosity of protoplasm is 2 – 20 centipoises. The Refractive index of the protoplasm is 1.4. 4. The pH of the protoplasm is around 6.8, contain 90% water (10% in dormant seeds). 5. Approximately 34 elements are present in protoplasm but only 13 elements are main or universal elements i.e. C, H, O, N, Cl, Ca, P, Na, K, S, Mg, I and Fe. Carbon, Hydrogen, Oxygen and Nitrogen form the 96% of protoplasm. 6. Protoplasm is neither a good nor a bad conductor of electricity. 7. Cohesiveness: Particles or molecules of protoplasm are adhered with each other by forces, such as Van der Waal’s bonds, that hold long chains of molecules together. This property varies with the strength of these forces. 8. Contractility: The contractility of protoplasm is important for the absorption and removal of water especially stomatal operations. 9. Surface Tension: The proteins and lipids of the protoplasm have less surface tension, hence they are found at the surface forming the membrane. On the other hand the chemical substances (NaCl) have high surface tension, so they occur in deeper parts of the cell protoplasm.

268.

Enumerate the properties of protoplasm.

Answer»

The properties of protoplasm:

1. Protoplasm is translucent, odourless and polyphasic fluid.

2. It is a crystal colloid solution which is a mixture of chemical substances forming crystalloid and colloidal solution.

3. Protoplasm exhibits three Brownian movement, amoeboid movement and cytoplasmic streaming or cyclosis. Viscosity of protoplasm is 2 – 20 centipoises. The Refractive index of the protoplasm is 1.4.

4. The pH of the protoplasm is around 6.8, contain 90% water (10% in dormant seeds).

5. Approximately 34 elements are present in protoplasm but only 13 elements are main or universal elements i.e. C, H, O, N, Cl, Ca, P, Na, K, S, Mg, I and Fe. Carbon, Hydrogen, Oxygen and Nitrogen form the 96% of protoplasm.

6. Protoplasm is neither a good nor a bad conductor of electricity.

7. Cohesiveness: Particles or molecules of protoplasm are adhered with each other by forces, such as Van der Waal’s bonds, that hold long chains of molecules together. This property varies with the strength of these forces. 8. Contractility: The contractility of protoplasm is important for the absorption and removal of water especially stomatal operations.

9. Surface Tension: The proteins and lipids of the protoplasm have less surface tension, hence they are found at the surface forming the membrane. On the other hand the chemical substances (NaCl) have high surface tension, so they occur in deeper parts of the cell protoplasm.

Discussion

269.	Balbiani rings occur inA. Lampbrush chromosomeB. HeterosomeC. AllosomeD. Polytene chromosome
Answer» Correct Answer - D Balbiani rings occur in polytene chromosome.

Discussion

270.	Balbiani rings are sites ofA. RNA and protein synthesisB. Lipid synthesisC. Nucleotide synthesisD. Polysaccharide synthesis
Answer» Correct Answer - A

Discussion

271.	Element required for bringing about union of ribosome submit isA. `Ca^(2+)`B. `Mg^(2+)`C. `Fe^(2+)`D. `Cu^(+)`
Answer» Correct Answer - B Element required for bringing about union of ribosome subunit is `Mg^(2+)` .

Discussion

272.	Select one which is not true for ribosomeA. Made of two sub unitsB. Form polysomeC. May attach tom-RNAD. Have no role in protein synthesis
Answer» Correct Answer - d

Discussion

273.	Select one which is not true for ribosomeA. Made up of two subunitsB. form polysomeC. may attach to mRNAD. have no role in protein synthesis
Answer» Correct Answer - D

Discussion

274.	Select one which is not true for ribosomeA. Made of two sub unitsB. Form polysomeC. may attach to mRNAD. Have no role in protein synthesis
Answer» Correct Answer - D

Discussion

275.	Which of the followimg is not surrounded by a membrane?A. VacuoleB. LysosomeC. MicrobodiesD. Nucleolus
Answer» Correct Answer - D Nucleolus is not surrounded by a membrane.

Discussion

276.	Balbiani rings are sites ofA. lipid synthesisB. nucleotide synthesisC. polysaccharide synthesisD. RNA and protein synthesis
Answer» Correct Answer - D A Balbiani ring is a large chromosome puff. Balbianirings are diffused uncoiled regions of the polytene chromosome that are sites of RNA transcription and protein synthesis.

Discussion

277.	Molecular weight of 50 S submit of 70 S ribosome isA. `1.8 xx 10^(6)` DaltonB. `1.5 xx 10^(6)` DaltonC. `2.2 xx 10^(6)` DaltonD. `2.5 xx 10^(6)` Dalton
Answer» Correct Answer - A Molecular weight of 50 s subunit of 70 s ribosome is `1.8 xx 10^(6)` Dalton.

Discussion

278.	Which of the followiing subcellular components is likely to be absent in plant root?A. MitochondriaB. ChloroplastsC. LeucoplastD. Ribosomes
Answer» Correct Answer - B Chloroplasts is likely to be absent in plant root.

Discussion

279.	Which of the following structures is not found in a prokaryotic cell?A. Nuclear envelopeB. RibosomeC. MesosomeD. Plasma membrane
Answer» Correct Answer - A In a prokaryotic cell, nuclear envelope is not found . It means genetic material (DNA) is not enclosed by any envelope and lies in direct contact with the cytoplasm.

Discussion

280.	Which of the following structures is not found in a prokaryotic cell?A. RibosomeB. MesosomeC. Plasma membraneD. Nuclear envelope
Answer» Correct Answer - D Nuclear envelope is not found in prokaryotic cell.

Discussion

281.	A major site for synthesis of lipids isA. SERB. SymplastC. NucleoplasmD. RER
Answer» Correct Answer - A

Discussion

282.	A major site for synthesis of lipids isA. SERB. SymplastC. NeucleoplasmD. RER
Answer» Correct Answer - A A major site for synthesis of lipids is SER.

Discussion

283.	Select the correct matching in the following pairs:A. Rough ER-Oxidation of fatty acidsB. Smooth ER-Oxidation ofphospholipidsC. Smooth ER-Synthesis of lipidsD. Rough ER- Synthesis of glycogen
Answer» Correct Answer - C

Discussion

284.	A major site for synthesis of lipids isA. RERB. SERC. symplastD. nucleoplasm
Answer» Correct Answer - B The Smooth Endoplasmic Reticulum (SER) is the major site for synthesis of lipids. RFR is actively involved in protein synthesis and secrecion. Nucleoplasm is the site for active ribosomal RNA synthesis . Symplast is the system of interconnected protoplast through which water movement occurs.

Discussion

285.	Which of the following structures is not found in prokaryotic cells ?A. Plasma membraneB. Nuclear envelopeC. RibosomeD. Mesosome
Answer» Correct Answer - B

Discussion

286.	Which of the following is always absent in prokaryotic cells?A. RibosomesB. MitochondriaC. DNAD. Cell wall
Answer» Correct Answer - B Out of the given options, prokaryotic cell does not have mitochondria to generate energy. A typical prokaryotic cell (i.e., bacterial cell) has cell wall just below the glycocalyx composed of peptidoglycan. They also have ribosome and DNA just like eukaryotes. They generate few energy or ATP via glycolysis (when oxygen is available) and lactic acid fermentation (when oxygen is unavailable).

Discussion

287.	A major site for synthesis of lipids isA. RERB. SERC. symplastD. nucleoplast
Answer» Correct Answer - B Synthesis of lipids takes place in SER while that of protein in RER.

Discussion

288.	Choose the incorrect answer regarding why should the material for electron microscopy he thin, dry and be kept I vacuum.A. to get straight beam of electronB. to avoid the collisionof electrons wit the atoms of oxygen and nitrogenC. to avoid multiple scatteringD. to overcome the problem of isotropy and anisotropy
Answer» Correct Answer - D

Discussion

289.	Which structures perform the function of mitochondria in bacteria ?A. NucleoidB. RibosomesC. Cell wallD. Mesosomes
Answer» Correct Answer - D Mesosomes perform the function of mitochondria in bacteria (prokaryotic cells). They are characteristic specialisation of cell membrane of bacteria that develop due to ingrowth of plasma membrane. It consists of vesicles, tubules and lamellae.

Discussion

290.	Which structures perform the function of mitochondria in bacteriaA. NucleoidB. RibosomesC. Cell wallD. Mesosomes
Answer» Correct Answer - D

Discussion

291.	An instrument used for obtaining extremely thin sections for microscopy isA. diamond knifeB. microtomeC. meat slicerD. tissue slicer
Answer» Correct Answer - B

Discussion

292.	Which structures perform the function of mitochondria in bacteria ?A. NucleoidB. RibosomesC. Cell wallD. Mesosome
Answer» Correct Answer - D

Discussion

293.	Dark field microscopy that is used to observec bacteria makes use ofA. no lightB. visible lightC. invisible infraredD. invisible UV-light
Answer» Correct Answer - B

Discussion

294.	Which structures perform the function of mitochondria in bacteriaA. MesosomesB. NucleoidC. RibosomesD. Cell wall
Answer» Correct Answer - A Mesosomes perform the function of mitochondria in bacteria.

Discussion

295.	The main arena of cellular activity in both plant and animal cell isA. NucleusB. CytoplasmC. Endomembrane systemD. Vacuole
Answer» Correct Answer - B The main arena of cellular activity is both plant and animal cell is cytoplasm.

Discussion

296.	The motile bacteria are also to move byA. PiliB. FimbriaeC. FlagellaD. Cilia
Answer» Correct Answer - C The motile bacteria are able to move by flagella.

Discussion

297.	The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known asA. LaminsB. MicrotubulesC. MicrofilamentsD. Intermediate filaments
Answer» Correct Answer - C The solid linear cytoskeletal elelments having a diameter of 6 nm and made up of a single type of monometer are known as microfilaments.

Discussion

298.	Which of the following organ has single membrane ?A. NucleusB. Cell wallC. MitochondriaD. Spherosomes
Answer» Correct Answer - D Cell wall does not have a membrane . The mitochondria and nucleus are surrounded by double membraned envelope. gt Spherosomoes are single membrane bound epherical structures in plant cell cytoplasm . These are apparently centres of lipid synthesis and accumulation .

Discussion

299.	The cell organelle involved in the glycosylation of proteins isA. ribosomeB. peroxisomeC. endoplasmic reticulumD. Mitochondria
Answer» Correct Answer - C The proteins synthesised by the ribosomes bound to ER are passed into the lumen of ER where an oligosaccharide is added to them (i.e. these are glycosylated)

Discussion

300.	Nucleoproteins are synthesised inA. nucleoplasmB. nuclear envelopeC. nucleolusD. cytoplasm
Answer» Correct Answer - D Nucleoprotems are the conjugated proteins. These include ribonucleoproteins and occur in ribosomes. Deoxyribonucleoproteins occur in chromosomes

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following components provides sticky character to the bacterial cellA. Cell wallB. Nuclear membraneC. Plasma membraneD. Glycocalyx

Water soluble pigments found in plant cell vacuoless areA. chlorophyllsB. carotenoidsC. anthocyaninsD. xanthophylls

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?A. LysosomeB. RibosomeC. ChloroplastD. Mitrochondrion

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?A. RibosomeB. ChloroplastC. MtiochondriaD. Lysosome

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?A. RibosomeB. ChloroplastC. MitochondrionD. Lysosome

Which is the suitable technique to obtain correct information regarding the location and synthesis of new DNA?A. Electron microscopyB. X-ray crystallographyC. ImmunoelectrophoresisD. Use of radioactive precursors of DNA and autoradiography

Addition of new cell wall particles amongst the existing ones isA. depositionB. appositionC. intussusceptionD. aggregation

New cells generate fromA. Bacterial fermentationB. Regeneration of old cellsC. Pre-existing cellsD. Abiotic materials

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based onA. Membrane potentialB. Accumulation of Na ionsC. Accumulation of `K^(+)` ionsD. Proton gradient

New cells generate from (a) bacterial fermentation (b) regeneration of old cells (c) pre-existing cells (d) abiotic materials

The outermost covering of animal cell is A) cell wall B) plasma membrane C) nuclear membrane D) nucleolar envelop

Primarily cells are studied under A) optical microscope B) compound microscope C) electron microscope D) none

List out the features of Cell Doctrine.

Enumerate the properties of protoplasm.

Balbiani rings occur inA. Lampbrush chromosomeB. HeterosomeC. AllosomeD. Polytene chromosome

Balbiani rings are sites ofA. RNA and protein synthesisB. Lipid synthesisC. Nucleotide synthesisD. Polysaccharide synthesis

Element required for bringing about union of ribosome submit isA. `Ca^(2+)`B. `Mg^(2+)`C. `Fe^(2+)`D. `Cu^(+)`

Select one which is not true for ribosomeA. Made of two sub unitsB. Form polysomeC. May attach tom-RNAD. Have no role in protein synthesis

Select one which is not true for ribosomeA. Made up of two subunitsB. form polysomeC. may attach to mRNAD. have no role in protein synthesis

Select one which is not true for ribosomeA. Made of two sub unitsB. Form polysomeC. may attach to mRNAD. Have no role in protein synthesis

Which of the followimg is not surrounded by a membrane?A. VacuoleB. LysosomeC. MicrobodiesD. Nucleolus

Balbiani rings are sites ofA. lipid synthesisB. nucleotide synthesisC. polysaccharide synthesisD. RNA and protein synthesis

Molecular weight of 50 S submit of 70 S ribosome isA. `1.8 xx 10^(6)` DaltonB. `1.5 xx 10^(6)` DaltonC. `2.2 xx 10^(6)` DaltonD. `2.5 xx 10^(6)` Dalton

Which of the followiing subcellular components is likely to be absent in plant root?A. MitochondriaB. ChloroplastsC. LeucoplastD. Ribosomes

Which of the following structures is not found in a prokaryotic cell?A. Nuclear envelopeB. RibosomeC. MesosomeD. Plasma membrane

Which of the following structures is not found in a prokaryotic cell?A. RibosomeB. MesosomeC. Plasma membraneD. Nuclear envelope

A major site for synthesis of lipids isA. SERB. SymplastC. NucleoplasmD. RER

A major site for synthesis of lipids isA. SERB. SymplastC. NeucleoplasmD. RER

Select the correct matching in the following pairs:A. Rough ER-Oxidation of fatty acidsB. Smooth ER-Oxidation ofphospholipidsC. Smooth ER-Synthesis of lipidsD. Rough ER- Synthesis of glycogen

A major site for synthesis of lipids isA. RERB. SERC. symplastD. nucleoplasm

Which of the following structures is not found in prokaryotic cells ?A. Plasma membraneB. Nuclear envelopeC. RibosomeD. Mesosome

Which of the following is always absent in prokaryotic cells?A. RibosomesB. MitochondriaC. DNAD. Cell wall

A major site for synthesis of lipids isA. RERB. SERC. symplastD. nucleoplast

Which structures perform the function of mitochondria in bacteria ?A. NucleoidB. RibosomesC. Cell wallD. Mesosomes

Which structures perform the function of mitochondria in bacteriaA. NucleoidB. RibosomesC. Cell wallD. Mesosomes

An instrument used for obtaining extremely thin sections for microscopy isA. diamond knifeB. microtomeC. meat slicerD. tissue slicer

Which structures perform the function of mitochondria in bacteria ?A. NucleoidB. RibosomesC. Cell wallD. Mesosome

Dark field microscopy that is used to observec bacteria makes use ofA. no lightB. visible lightC. invisible infraredD. invisible UV-light

Which structures perform the function of mitochondria in bacteriaA. MesosomesB. NucleoidC. RibosomesD. Cell wall

The main arena of cellular activity in both plant and animal cell isA. NucleusB. CytoplasmC. Endomembrane systemD. Vacuole

The motile bacteria are also to move byA. PiliB. FimbriaeC. FlagellaD. Cilia

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known asA. LaminsB. MicrotubulesC. MicrofilamentsD. Intermediate filaments

Which of the following organ has single membrane ?A. NucleusB. Cell wallC. MitochondriaD. Spherosomes

The cell organelle involved in the glycosylation of proteins isA. ribosomeB. peroxisomeC. endoplasmic reticulumD. Mitochondria

Nucleoproteins are synthesised inA. nucleoplasmB. nuclear envelopeC. nucleolusD. cytoplasm