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.
| 201. |
Cristae are associated with which of the following?A. MitochondrionB. CytoplasmC. ProtoplasmD. Endoplasmic reticulum |
| Answer» Correct Answer - A | |
| 202. |
Protein substances are generally stained withA. iodineB. light greenC. cotton blueD. ruthenium red |
| Answer» Correct Answer - D | |
| 203. |
Define flip – flop movement. |
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Answer» The movement of membrane lipids from one side of the membrane to the other side by vertical movement is called flip – flopping or flip – flop movement. |
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| 204. |
Golgi apparatus is rich in______A. protein and phospholipidsB. DNA and proteinsC. lipids and DNAD. All of these |
| Answer» Correct Answer - A | |
| 205. |
Mitochondrial cristae are sites ofA. breakdown of macromoleculesB. protein synthesisC. phosphorylation of flavoproteinsD. oxidation-reduction reactions |
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Answer» Correct Answer - D Mitochondrial cristae bear the functional unit , i.e., oxysomes . Fernandes and Moran particles `(F_(0) - F_(1))` particles or electron transport particle. Since , inner membrane is imperimeable to ATP thus ATP is synthesised on oxysomes having ATPase in `F_(1)` (stalk) and proton channels on `F_(0)` (base) ATPase helps in oxidative phosphorylation , synthesise ATP through electron transport system by undergoing oxidation reduction reactions. |
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| 206. |
Which of the following correctly explains mitochondrial function and results?A. Oxidative phosphorylation, dephosphorylation, metabolic water productionB. Dephosphorylation, metabolic water production, `CO_(2)`,productionC. Oxidative phosphorylation, metaboic water production, `CO_(2)` productionD. Oxidation phosphorylation, dephosphorylation, `CO_(2)` production. |
| Answer» Correct Answer - C | |
| 207. |
Which among the following is NOT an exception to cell theory? (a) Viruses (b) Viroids (c) Prions (d) Fungi |
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Answer» Correct Answer is: (d) Fungi |
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| 208. |
Medium for electron movement in TEM is …………… . (a) Air(b) Oil(c) Water (d) Vacuum |
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Answer» Medium for electron movement in TEM is Vacuum. |
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| 209. |
karyotype isA. division of nucleusB. chromosomes completementC. specific for each speciesD. all organisms possessing same type of chromosome |
| Answer» Correct Answer - B | |
| 210. |
List out the components of Electron microscope. |
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Answer» The components of the microscope are as follows: 1. Electron Generating System 2. Electron Condensor 3. Specimen Objective 4. Tube Lens 5. Projector |
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| 211. |
Genes located on mitochondrial DNA bring aboutA. generally show maternal inheritanceB. are always inherited from the male parentC. show biparental inheritance like the nuclear genesD. are not inherited |
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Answer» Correct Answer - A Mitochondria are found only in eukaryotic cells , they contain a single circular double stranded DNA molecule (mtDNA) . Available evidences show that mitochondria of female parent are transferred to progency during fertilisation . Recent studies have shown that factors responsible for cytoplasmic male sterility are located in mitochondrial DNA . |
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| 212. |
Resolving power of SEM is …………… .(a) 5 – 10 Å (b) 2 – 10 Å (c) 5 – 20 nm (d) 5 – 20 m |
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Answer» Resolving power of SEM is 5 – 20 nm. |
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| 213. |
The organelle responsible for supply of glycosylated molecules to plasma membrane isA. Golgi complexB. mitochondriaC. ribosomesD. peroxisomes |
| Answer» Correct Answer - A | |
| 214. |
Protein synthesis in an animal cell occursA. only on the ribosomes present in the cytosolB. only on the ribosomes attached to nuclear envelope and endoplasmic reticulumC. on rebosomes present in the nucleolus as well as in cytoplasmD. on ribosomes present I the cytosol as well as in the mitochondria |
| Answer» Correct Answer - D | |
| 215. |
Protein synthesis in an animal cell, takes placeA. only in cytoplasmB. in the nucleolus as well as in the cytoplasmC. in the cytoplasm as well as in mitochondriaD. only on ribosomes attached to nucleus |
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Answer» Correct Answer - C Protein synthesis is a complex process , it essentially involves DNA for the synthesis of mRNA (transcription ) which contains information for the synthesis of proteins (translation) . The process of translation takes place on ribosomes which are found in cytoplasm (in attached form on ER) and in mitochondria (in the tree form). |
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| 216. |
Protein synthesis in an animal cell occursA. only on the ribosomes present in cytosolB. only on ribosomes attached to the nuclear envelope an d endoplasmic reticulumC. on ribosomes present in the nucleolus as well as in cytoplasmD. on ribosomes present in cytoplasm as well as in mitochondria |
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Answer» Correct Answer - D Protein synthesis is taken place on ribosomes. In an eukaryotic cell ribosomes are present in cytoplasm, mitochondria and chloroplasts. So, in these places protein synthesis also takes place. |
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| 217. |
Explain the principle involved in Scanning Electron Microscope (SEM). |
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Answer» In Scanning Electron Microscope (SEM) electrons are focused by means of lenses into a very fine point. The interaction of electrons with the specimen results in the release of different forms of radiation (such as auger electrons, secondary electrons, back scattered electrons) from the surface of the specimen. These radiations are then captured by an appropriate detector, amplified and then imaged on fluorescent screen. |
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| 218. |
Why do the cancer cells have numerous ribosomes ? |
| Answer» To synthesize large quantities of proteins for rapid cell divisions. | |
| 219. |
Which of the cell organelle lack membrane ?A. MesosomeB. MitochondriaC. ribosomeD. liposome |
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Answer» Correct Answer - C Ribosomes were first observed by george palade (1953) under the electron microscope as dense particles. |
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| 220. |
According to nucleosome model, chromatin consists ofA. non-histone proteins and DNAB. histone proteins and DNAC. RNA and histone proteinD. DNA and acidic proteins |
| Answer» Correct Answer - B | |
| 221. |
Chromatin is chemically made ofA. nucleic acid, histone and non-histone proteinB. nucleic acid and histone proteinC. nucleic acid and non-histone proteinD. nucleic acid |
| Answer» Correct Answer - A | |
| 222. |
In confocal scanning, light microscope was inverted byA. LehmannB. Max HaitingerC. Marvin MinskyD. Knoll and ruska |
| Answer» Correct Answer - C | |
| 223. |
protein synthesis takes place inA. ribosomesB. chloroplastsC. mitochondriaD. golgi bodies |
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Answer» Correct Answer - A Protein synthesis is also known as translation. It takes place in ribosomes. Ribosomes are non-membrane bound cell organelles, made up of protein and RNA. |
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| 224. |
The types of ribosomes found in prokaryotic cells areA. 100SB. 80SC. 60SD. 70S |
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Answer» Correct Answer - D Ribosomes are electrons microscopic ribonucleoprotein particles found to be attached either or RER or freely in cytoplasm. The ribosomes found in prokaryotes are as 70S type while in eukaryotes are of 80S type. |
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| 225. |
Phase contrast scanning, light microscope was invented byA. Fritz-ZernikeB. Galileo galilieC. M knoll and E ruskaD. J Jansen and Z Janssen |
| Answer» Correct Answer - A | |
| 226. |
The chromosomes become gradually visible with compaction of chromatin during the meiotic stageA. DiploteneB. LeptoteneC. ZygoteneD. pachytene |
| Answer» Correct Answer - B | |
| 227. |
A fluorescence microscope is used toA. obtain structure of DNAB. increase resolving powerC. identify microbes in tissuesD. study ultrastructural details |
| Answer» Correct Answer - C | |
| 228. |
Electrons used in electron microscope are of the wavelengthA. 0.05 `Å`B. `0.1Å`C. `0.15Å`D. `0.5Å` |
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Answer» Correct Answer - D Electrons used in electron microscope have a wavelength or 0.5 ` `. |
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| 229. |
Mitochondria will be found in abundance in cells of tissues havingA. minimum activityB. average activityC. maximum activityD. None of the above |
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Answer» Correct Answer - C The cells, which are metabolically active contain mitochondria in abundance. |
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| 230. |
In a cell that is not dividing, the chromosomes are visible as a tangle of fine threads calledA. microtubulesB. chromatinC. microfilamentsD. nucleotin |
| Answer» Correct Answer - B | |
| 231. |
Fluorescence microscope I. used to detect specific proteins or other molecules in cells and tissues. II. Uses UV light with higher wavelength (3500-4000Å). III. Is useful mainly for viewing highly ordered objects such as crystals. IV. dependson changes in the speed of light for its functioning.A. I and IIIB. I and IIC. Only IIID. I and IV |
| Answer» Correct Answer - B | |
| 232. |
Assertion. Fine structure of the objects can be observed by transmission electron microscope (TEM). Reason. Study of living cells cannot be done through TEM, because of high voltage, which is required to operate it, Kills 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 | |
| 233. |
In which of the following microorganisms, mitosis does not occur?A. Green algaeB. FungiC. BacteriaD. Higher plants |
| Answer» Correct Answer - C | |
| 234. |
Which of the following has one-envelope system?A. Prokaryotic cellB. Eukaryotic cellC. Both (1) and (2)D. None of these |
| Answer» Correct Answer - a | |
| 235. |
At certain places, the nuclear envelope is interrupted by the presence of nuclear pores which are enclosed by cir- cular structures called asA. Perinuclear spaceB. AnnuliC. Pore complexD. Nucleolus |
| Answer» Correct Answer - B | |
| 236. |
I appreciate stomata because they are helpful inA) Photosynthesis B) Respiration C) Transpiration D) All the above |
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Answer» D) All the above |
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| 237. |
The cells are held together by a Ca- Pectate layer calledA. Primary cell wallB. Secondary cell wallC. Middle lamellaD. Tertiary cell wall |
| Answer» Correct Answer - C | |
| 238. |
Osmotic expansion of a cell kept in water is chiefly regulated byA. MitochondriaB. VacuolesC. PlasticdsD. Ribosomes |
| Answer» Correct Answer - B | |
| 239. |
Which of the following structure is not found in prokyaryotic cells ?A. Plasma membraneB. Nuclear envelopeC. RibosomeD. Mesosome |
| Answer» Correct Answer - B | |
| 240. |
Man and mouse cells are treated with red and green fluorescent dyes separately and are made to fuse. The resultant eel ls when kept at `37^(@)C`, the distribution of dye on the surface of cell will beA. B. C. D. |
| Answer» Correct Answer - D | |
| 241. |
Omnis cellula`-` e cellula is generalisation given byA. LamarkB. DuttrochetC. LeeuwenhockD. Virchow |
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Answer» Correct Answer - D Omnis cellula`-`e cellula is generalisation given by R.Virchow. |
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| 242. |
Cell Lineage 'all cells are derived from preexisting cells' is the famous generalisation ofA. LamarckB. VirchowC. SchwannD. Darwin |
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Answer» Correct Answer - B Virchow proposed cell lineage/cell always arises from pre-existing cell. |
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| 243. |
Which one of the following is correct for transmembrane proteins in lipid bilayerA. They are absent in animal cellsB. They act as channel proteinsC. They are absent in plant cellsD. they are only externally located. |
| Answer» Correct Answer - B | |
| 244. |
When the chromosome has a centromere nearer to one end of the chromosome resulting into one shorter and one longer arm, the chromosome is termed asA. MetacentricB. Sub-metacentricC. AcrocentricD. Telocentric |
| Answer» Correct Answer - B | |
| 245. |
Match the columns and identify the correct option `{:("Column -I ","Column-II"),("Thylakoids","(i) Disc-shaped sacs in golgi appartus"),("Cristae","(ii) Condensed structure of DNA"),("Cisternae","(iii) Flat membranous sacs in stroma"),("Chromatin","(iv) Infoldings in mitochondria"):}` |
| Answer» Correct Answer - C | |
| 246. |
Match the columns and identify the correct option `{:("Column -I ","Column-II"),("Thylakoids","(i) Disc-shaped sacs in golgi appartus"),("Cristae","(ii) Condensed structure of DNA"),("Cisternae","(iii) Flat membranous sacs in stroma"),("Chromatin","(iv) Infoldings in mitochondria"):}`A. `{:(,,"(a)","(b)","(c)","(d)"),(,"(1)","(iii)","(iv)","(ii)","(i)"):}`B. `{:(,,"(a)","(b)","(c)","(d)"),(,"(2)","(iv)","(iii)","(i)","(ii)"):}`C. `{:(,,"(a)","(b)","(c)","(d)"),(,"(3)","(iii)","(iv)","(i)","(ii)"):}`D. `{:(,,"(a)","(b)","(c)","(d)"),(,"(4)","(iii)","(ii)","(iv)","(ii)"):}` |
| Answer» Correct Answer - C | |
| 247. |
Ribosomes are essential for protein synthesis, but they are present in mitochondria and plastids, the sites of respiration and photosynthesis. What is the role of ribosomes in these organelles?A. Ribosomes transport ATP formed in respiration and photosynthesis to cytoplasm through ERB. Subunits of some required proteins are synthesised in these organellesC. Ribosomes transport RNA and DNA to cytoplasmD. All of these |
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Answer» Correct Answer - B Ribosomes are found inside the chloroplast and mitochondria, besides nucleus. It is mainly, these organelles are semiautonomous, i.e., some of the proteins that are utilised for organelle functioning are synthesised in these organelles as well as in nucleus, e.g. large subunit of RuBisCO is synthesised in chloroplast while small in nucleus. |
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| 248. |
According to widely accepted "Fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several repects. In this regard, which of the following statements is incorrectA. Proteins in cell membranes can travel within the lipid bilayer.B. Proteins can also undergo flip-flap movements in the lipid bilayer.C. Proteins can remain confined within certain domains of the membrane.D. Many proteins remain completely embeded within the lipid bilayer. |
| Answer» Correct Answer - B | |
| 249. |
According to widely accepted "Fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several repects. In this regard, which of the following statements is incorrectA. Proteins can also undergo flip-flop movements in the lipid bilayer.B. Many proteins remain completely embedded within the lipid bilayer.C. Proteins in cell membranes can travel within the lipid bilayer.D. Proteins can remain confined within certain domains of the membranes. |
| Answer» Correct Answer - A | |
| 250. |
According to widely accepted "Fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several repects. In this regard, which of the following statements is incorrectA. Proteins in cell membranes can travel within the lipid bilayerB. Proteins can also undergo flip-flop movements in the lipid bilayer.C. Proteins can remain confined within certain domains of the membranes.D. Many proteins remain completely embedded within the lipid bilayer |
| Answer» Correct Answer - B | |