

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.
151. |
How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it In the same way? If not, then how are these transported across the membrane? |
Answer» Neutral solutes move across the plasma membrane by the process of simple diffusion along the concentration gradient i.e. from higher concentration to lower concentration. Movement of water by diffusion is called osmosis. Polar molecules cannot move across the membrane by diffusion. They require a carrier protein of the membrane to facilitate their transport. Few ions or molecules are transported across the membrane against their concentration gradient i.e. from lower to higher concentration which is energy (ATP) consuming and is called active transport. |
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152. |
A phospholipid molecule is amphipathic and produce two layers coming in contact with `H_(2)O`. The head of phospholipid molecule isA. at and angle of `40^(@)`B. towards the outer sideC. between the surfacesD. embedded in protein molecules |
Answer» Correct Answer - B | |
153. |
Read the assertion and reason carefully to mark the correct option in question. Assertion: Golgi apparatus remains in close association with the endoplasmic reticulum. Reason: A number of proteins synthesised by ribosomes on the ER are modified in the cisternae of the GB before they are released from the trans face.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
Answer» Correct Answer - A Golgi apparatus remains in close association with the endoplasmic reticulum because a number of proteins synthesised by ribosomes on the ER are modified in the cisternae of the GB before they are released from the trans face. |
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154. |
What is ‘magnification’? |
Answer» Amount of increase in apparent size of a thing more time than its normal size to visualise is called magnification. |
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155. |
What is the meaning of ‘Cell’ in Latin? |
Answer» In Latin ‘cell’ means ‘A little room’. |
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156. |
What are Unicellular Organisms? Give examples. |
Answer» The organisms survive its life with a single cell are called unicellular organisms. Ex : Amoeba, Chlamydomonas, etc. |
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157. |
The prokaryotic cells are characterized byA. Distinct chromosomeB. Absence of chromatin materialC. Absence of nuclear membraneD. Distinct nuclear membrane |
Answer» Correct Answer - C | |
158. |
Is which one of the following would you expect to find glyoxysomesA. Endosperm of wheatB. Endosperm of castorC. Palisade cells in leafD. Root hairs |
Answer» Correct Answer - B | |
159. |
The universally accepted model of plasma membrane isA. Lamellar modelB. Unit membrane modelC. Fluid mosaic modelD. Overton model |
Answer» Correct Answer - C | |
160. |
Middle lamella containsA. ChitinB. LigninC. PectinD. Cellulose |
Answer» Correct Answer - C | |
161. |
Middle lamella is composed ofA. carbohydrateB. calcium pectateC. proteinD. peptidoglycan |
Answer» Correct Answer - B Middle lamella is a thin binding layer between the cell wall of adjacent plant cell. It is chemically formed of calcium and magnesium pectate. |
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162. |
Select one which is not true for ribosomeA. Made up of two sub-unitsB. Form polysomeC. may attach to mRNAD. Have no role in protein synthesis |
Answer» Ribosomes are truly callad as protein factory and they play a vital role in protein synthesis. Thus, the statement that ribosomes have no role in protein synthesis is not true. Other statements are true for ribosome Ribosomes are made up of two subunits, i.e., large and small. In prokaryotes it is 70S (50S and 30S). In eukarynotes it is 80S (60S ,and 40S). Polyribosomes Several ribosomes attach to a single mRNA and form a chain like structrue, Polysomes They are formed by the attachment of ribosomes with mRNA. |
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163. |
Plasma membrane is made up ofA. lipid, protein and waterB. lipid, protein and manganeseC. lipid and carbohydrateD. lipid, protein and carbohydrate |
Answer» Correct Answer - D Every living cell is externally covered by a thin transparent, electron microscopic, elastic semipermeable membrane called cell membrane, it is composed of lipids (mostly phospholipid), proteins (peripheral and integral) and carbohydrates (glycoprotein and glycolipids). |
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164. |
Do large animal have large cells ? |
Answer» Correct Answer - No. | |
165. |
Middle lamella is presentA. inside the secondary wallB. inside the primary wallC. outside the primary wallD. in between secondary and tertiary walls |
Answer» Correct Answer - C Middle lamella is a thin, binding layer between the cell wall of adjacent plant cells. It is chemically formed of pectates of calcium and magnesium. It is present outisde the primary wall. |
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166. |
The middle lamella is theA. outermost layer of cell wallB. contains an enzyme enolaseC. exists as a cementing layer between cell wall of neighbouring cellsD. Both (a) and (c) |
Answer» Correct Answer - D | |
167. |
The technique that counts and identifies cells and chromosomes isA. electrophoresisB. flow cytometryC. both (b) and (c)D. X-ray crystallography |
Answer» Correct Answer - B | |
168. |
Comparing small and large cels, which statement is correct?A. Small cells have a small surface area per volume ratioB. exchange rate of nutrients is fast with large cellsC. Small cells have a large surface area per volume ratioD. exchange rate of nutrients is slow with small cells |
Answer» Correct Answer - C Small cells have a large surface area per volume ratio as compared to large cells. |
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169. |
Which technique is used in seperating proteins from other fractions?A. ChromatographyB. AutoradiographyC. ElectrophoresisD. Ultracentrifugation |
Answer» Correct Answer - D Ultracentrifugation technique is used in seperating proteins from other fractions. |
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170. |
In eubacteria, a cellular component that resembles eukaryotic cell isA. nucleusB. ribosomesC. cell wallD. plasma membrane |
Answer» Correct Answer - D The plasma membrane of eubacteria resembles to that of eukaryotic cell. It is made of phospholipid, protein and some amount of polysaccharides. However, it lacks sterol, which is a characteristic of eukaryotic cell membrane. |
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171. |
Mesokaryotic cells are different from eukaryotic cell inA. lacking well-defined nucleusB. lacking cell membraneC. lacking histone proteinsD. Having DNA |
Answer» Correct Answer - C | |
172. |
Bacterial cells have a chemically complex cell envelope. The cell envelope consists of a tightly bound three layer structure, i.e., theA. Outermost cell wall followed by the plasma membrane and then the glycocalyxB. Outermost glycocalyx followed by plasma membrane and the cell wallC. Outermost cell wall followed by the glycocalyx and then the plasma membraneD. Outermost glycocalyx followed by the cell wall and then the plasma membrane |
Answer» Correct Answer - D Bacterial cells have a chemically complex cell envelope. The cell envelope consists of a tighty bound three layer structure, i.e. the outermost glycocalyx followed by the cell wall and then the plasma membrane. |
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173. |
Number of membrane(s) seperating intrathylakoid space from cytoplasm isA. 4B. 3C. 2D. 1 |
Answer» Correct Answer - B Number of membrances seperating intrathylakoid space (lumen) from cytoplasm are 3. |
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174. |
Which one of the following organisms is not an example of eukaryotic cellsA. Escherichia coliB. Euglena viridisC. amoeba proteusD. paramecium caudatum |
Answer» Correct Answer - A The bacterium E. coli is a prokaryote. |
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175. |
Assertion. The nuclear envelope acts as an interface between the genetic component of the cell and the cytoplasm. Reason. It thus protects DNA against the mutagenic effect of cytoplasmic enzymeA. 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 | |
176. |
What is the source of nuclear envelope ? |
Answer» Small veiscles formed by breakdown of nuclear envelope during prophase. | |
177. |
The nucleus is separated from surrounding cytoplasm by a nuclear membrane, which isA. single layered with poresB. single layered without poresC. double layered with poresD. double layered without pores |
Answer» Correct Answer - C The nuclear membrane of the nucleus which separates nucleus and cytoplasm is double membranous and porous. |
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178. |
Which cell organelle connects nuclear envelope with cell membrane ?A. LysosomeB. Golgi bodyC. Endoplasmic reticulumD. Mitochondrion |
Answer» Correct Answer - C Endoplasmic reticulum connect nuclear envelope with cells membrane. |
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179. |
Nuclear membrane is continous withA. rough endoplasmic reticulumB. smooth endoplasmic reticulumC. cell membraneD. golgi bodies |
Answer» Correct Answer - A | |
180. |
A single mitochondrion is found inA. Flight muscles of insectsB. Human spermC. MicrasteriasD. Chaos chaos |
Answer» Correct Answer - C | |
181. |
Tolbert is associated with which one of the following cell structures?A. PeroxisomesB. SpherosomesC. QuantasomesD. Glyoxysomes |
Answer» Correct Answer - A | |
182. |
Read the following statements and find out the correct statements(s).A. Cells are formed de nevo from abiotic materials.B. A unicellular organism carries out its life activities within a single cell.C. Cells of all living organisms have a nucleus.D. All of the above. |
Answer» Correct Answer - B * Cell are not found de nevo from abiotic materials. * A unicellular organism carries out its life activities within a single cell. * Cell of all living organism do not necessarily have nucleus e.g.: RBCs of mammals. |
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183. |
How many cells occurs in a human being weighing about 60 kg ? |
Answer» Correct Answer - `60xx10^(15)` | |
184. |
Mention the largest plan and animal cells. |
Answer» Acetabularia - an alga, nerve cells. | |
185. |
(a) What is a granum (pleural grana) in a chloroplast ? How many grana are there in the matrix of each chloroplast ? (b) Name the photosynthetic pigments that are present in the thylakoid membrane of chloroplast. |
Answer» (a) The infolds of the inner membrane of chloroplast become free to lie as lamellae in the matrix. These lamellae usually take the form of closed, flattened, ovoid sacs called thylakoids which lie closely packed in piles called grana. A chloroplast may have 40 to 100 grana in its matrix. (b) The thylakoid membrane contains photosynthetic pigments such as chlorophyll a , chlorophyll b, carotenoids ( carotene, xanthophylls ) and plastoquinone. |
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186. |
Give two factor that determine cell isze. |
Answer» Nutrient and oxygen requirement, regulating ability of nucleus. | |
187. |
Plasmodesmatal connection helps inA. cytoplasmic streamingB. synchronous mitotic divisionsC. locomotion of unicellular organismsD. movement of substances between cells |
Answer» Correct Answer - D Plasmodesmata connection help in movement of substances between cells. |
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188. |
karyotyping helps in detection ofA. evolutionary relationshipsB. chromosomal abberationC. primitive features of an organismD. all of the above |
Answer» Correct Answer - D | |
189. |
Why are the egg cell usually large in isze ? |
Answer» Egg cells often store food for the nourishment of the developing embryo. | |
190. |
A giant lyososome that helps in penetrationof sperms into egg is_____A. cathepsin-DB. primary lyososomeC. acrosomeD. ambilysosome |
Answer» Correct Answer - C | |
191. |
Which of the following is not true of a eukaryotic cellA. It has 80 S type of ribosome present in the mitochondriaB. It has 80 S type of ribosome present in the cytoplasmC. Mitochondria contain circular DNAD. Membrane bound organelles are present |
Answer» Correct Answer - A | |
192. |
The type of cell juction which facilitates cell to cell communication isA. Tight junctionB. Adhering junctionC. Gap junctionD. Demosomes |
Answer» Correct Answer - C | |
193. |
Which is true of ribosome?A. Prokaryotic ribosomes and 80SB. Composed of RNA and proteinsC. Found only in eukaryotic cellsD. They are self-spliciting introns of some RNAs |
Answer» Correct Answer - B | |
194. |
The following are known as suicidal bags of the cells A) Ribosomes B) Vacuoles C) Lysosomes D) Golgi complex |
Answer» Correct option is C) Lysosomes |
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195. |
Quantasome are present inA. StromaB. GranaC. MitochondriaD. Golgi body |
Answer» Correct Answer - B | |
196. |
At what speed, the mitochondria can be separated out by differential centrifugation?A. `200xxg`B. `500xxg`C. `800xxg`D. `8000xxg` |
Answer» Correct Answer - D | |
197. |
Assertion. Lysosomes are called suicide bags of the cell. Reason. Lysosomes carry on autolysis (autophagy) in the cell.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 | |
198. |
If, we separate the cell organelles of a living cell, which part should be alive?A. Endoplasmic reticulumB. chloroplastsC. cell wallD. ribosomes |
Answer» Correct Answer - B | |
199. |
The chromatography used to separate substances that can be vapourised is____A. gas chromatographyB. paper chromatographyC. gel filtration chromatographyD. thinlayer chromatography |
Answer» Correct Answer - A | |
200. |
Golgi apparatus is absent inA. higher plantsB. yeastC. bacteria and blue-green algaeD. None of the above |
Answer» Correct Answer - C Golgi bodies are absent in prokaryotic cells, (i.e. bacteria, cyanobacteria, mycoplasma), in mature RBC, mature sperms, mature eggs, sperms of bryophytes, pteridophytes and matur~ sieve tubes. In contrast, .active eukaryotic cells are rich in Golgi bodies. Maximum number (25000) of Golgi bodies are found in rhizoidal cells of Chara. |
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