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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.
| 551. |
Select the option that correctly identifies the different genera (A,B,C and D) of kingdom Fungi shown in figure. A. `{:(A,B,C,D),("Mucor","Saccharomyce","Morchella","Amanita"):}`B. `{:(A,B,C,D),("Mucor","Saccharomyces","Aspergillus","Morchella"):}`C. `{:(A,B,C,D),("Rhizopus","Saccharomyces","Aspergilius","Morchella"):}`D. `{:(A,B,C,D),("Aspergillus","Rhizopus","Penicilium","Agaricus"):}` |
| Answer» Correct Answer - B | |
| 552. |
Red tides in warm coastal water develop due to the abundance ofA. dinoflagellatesB. EuglenoidsC. diatoms and desmidsD. slime moulds. |
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Answer» Correct Answer - A Some dinoflagellates such as Gymnodinium and Gonyaulas grow in large number in the sea and make the water look red and cause the so called "red tide". |
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| 553. |
Assertion : Mycoplasmas are pathogenic in animals and plants. Reason : Mycoplasmas lack cell wall and can survive without oxygen.A. If both assertion and reason and true and reason is the correct explanation of assertion.B. If both assertion and reason and true and 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 | |
| 554. |
Who recognised certain microbes as causal organism of the mosaci disease ?A. IvanowskyB. PasteurC. BeijerinekD. Stanely |
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Answer» Correct Answer - A Ivanowsky recognised certain microbes as causal organism of the mosaic disease. |
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| 555. |
The Cell Wall of bacterium is made up ofA. CelluloseB. HemicelluloseC. LigninD. Peptidoglycan |
| Answer» Correct Answer - D | |
| 556. |
Read the following statements and select the correct option Statement1: Almost all bacteria possess lipoproteinaceous plasma membrane. Statement2: The plasma membrane of archaebacteria as well as eubacteria have same type of lipids.A. Both statements 1 and 2 are correct.B. Statement 1 is correct but statement 2 is incorrect.C. Statement 1 is incorrect but statement 2 is correct.D. Both statements 1 and 2 are incorrect. |
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Answer» Correct Answer - B Bacterial plasma membrane or plasmalemma has a structure similar to that of a typical membrane. It is made of a phospholipid bilayer with proteins of various types (extrinsic, integral, transmembrane). Archaebacteria are a group of most promitive prokaryotes which are able to survive in extremely hostile conditions. Their cell membranes are different from eubacteria and are characterised by the presence of a monolayer of branched chain lipids. |
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| 557. |
Which one of the following statements about mycoplasma is wrongA. They are pleomorphicB. They are sensitive to penicillinC. They cause disease in plantsD. They are also called PPLO |
| Answer» Correct Answer - B | |
| 558. |
Chrysophytes areA. planktonsB. nektonsC. benthic organismsD. rooted submerged. |
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Answer» Correct Answer - C Chrysophytes are found in freshwater as well as in marine environment. They are microscopic and float passively in water currents, i.e., they are plankton. Most of them are photosynthetic. |
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| 559. |
Which of the following statements is incorrect?A. Pathogenic bacteria cause 90% of human diseases.B. A large number of antiboitics are produced by actinomycets (e.g. Streplomyces), which are a class of fungi.C. `N_(2)`. fixing bacteria pick up free `N_(2)` from soil atmosphere and convert it into nitrogenous compounds.D. Archaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their suvival in extreme conditions. |
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Answer» Correct Answer - D Maximum number of antibiotics are produced by mycelial bacteria known as actinomycetes, e.g., Streptomycin - Streptomyces griseus, Chloromycetin or chloramphenicol - Streptomyces venezuelae and S. lavendulae. |
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| 560. |
Asseration : Cell wall of Chrysophytes are indestructible. Reason : Cell walls of Chrysophytes have layer of magnesium pectate embedded in it.A. If both assertion and reason and true and reason is the correct explanation of assertion.B. If both assertion and reason and true and 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. |
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Answer» Correct Answer - C Chrysophytes include diatoms and golden algae (desimds). They are found in freshwater as well as in marine enviroments. The cell walls are embedded with silica and thus the walls are indestructible. |
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| 561. |
Which of the following organisms have been placed under kingdom Protista?A. Chrysophytes and dinoflagelatesB. EuglenoidsC. Slime moulds and protozoansD. All of these |
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Answer» Correct Answer - D The kingdom protista has been broadly divided into three main groups : (i) Photosynthetic Protists (protistan algae) : e.g., Dinoflagellates, Chrysophytes and Euglenoids (ii) Consumer-decomposer protists and Euglenoids (iii) Protozoan protists |
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| 562. |
Which of the following kingdoms has no well defined boundaries?A. moneraB. ProtistaC. FungiD. None of these |
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Answer» Correct Answer - C Although all single-celled eukaryotes (except some unicellular algae, e.g., Chlamydomonas, Chlorell etc. fungi e.g., yeasts and animals, which their closely related multicellular kingdoms along with their closely related multicellular organisms) are placed in Kingdom Protists, yet its boundaries are not well defined. |
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| 563. |
Phototrophs and Chemotrophs are defined based on theirA. Energy sourceB. Requirement of organic and inorganic substancesC. MetabolismD. Structure |
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Answer» Correct Answer - A Phototrophs and chemotrophs are defined based on their energy source. |
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| 564. |
Assertion : Mesosomes help in respiration in bacteria. Reason : They do not have mitochondria.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true but R is not the correct explanation of AC. If A is true but R is false.D. If both A and R are false |
| Answer» Correct Answer - A | |
| 565. |
Assertion : Mitochondria is known as power house of cell. Reason : ATP production takes place here.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. 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. |
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Answer» Correct Answer - B Mitochondria are called power house of a cell because they produce large amonut of energy in the form of ATP. |
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| 566. |
Viruses haveA. Both DNA and RNAB. DNA enclosed in a protein coatC. Prokaryotic nucleusD. Single chromosome |
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Answer» Correct Answer - B Viruses have DNA enclosed in a protein coat. |
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| 567. |
Cud chewing animals areA. SanguivorusB. RuminantsC. FrugivoresD. Cannibals |
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Answer» Correct Answer - B Cud chewing animals are ruminants. |
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| 568. |
Which is correct about ionisation potential ?A. `IE_(1)` of `IE_(1)` of `O`B. `IE_(2)` of `N gt IE_(2)` of `O`C. `IE_(2)` of `Li gt IE_(2)` of `Ne`D. `IE_(1)` of `Al gt IE_(1)` of `Ca` |
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Answer» Correct Answer - A::C a. True. `IE_(1)` of `N gt IE_(1)` of `O`, due to half-filled configuration in `N`. b. False. `N underset(("More stable"))((2s^(2) 2p^(3))) underset(("High" IE_(1)))overset(-e^(-))rarr N^(o+) underset(("Last stable"))((2s^(2) 2p^(2)))` `underset(("Low" IE_(2)))overset(-e^(-))rarr N^(2+)(2s^(1) 2p^(1))` `O underset(("Last stable"))((2s^(2) 2p^(4))) underset(("Low" IE_(1))) overset(-e^(-))rarr O^(o+) underset(("More stable"))((2s^(2) 2p^(3)))` `underset(("High" IE_(2))) overset(-e^(-))rarr O^(2+) (2s^(2) 2p^(2))` Hence, `IE_(2)` of `O gt IE_(2)` of `N` c. True. `Li underset(("Less stable"))((2s^(1))) underset(("Low" IE_(1)))overset(-e^(-))rarr underset(("More stable")) (Li^(o+)(2s^(0))) underset(("High" IE_(2))) overset(-e^(-))rarr Li^(2+) (1s^(1))` `Ne underset(("More stable")) ((2s^(2) 2p^(6))) underset(("High" IE_(1))) overset(-e^(-))rarrNe^(o+) underset(("Less stable"))((2s^(2) 2p^(5)))` `underset(("Low" IE_(2))) overset(-e^(-))rarr Ne^(2+) (2s^(2) 2p^(4))` `:. IE_(2)` of `Li gt IE_(2)` of `Ne` d. False. `IE` of `Ca gt IE` of `Al`, due to stable configuration in `Ca (4s^(2))` than in `Al (3s^(2) 3p^(1))`. |
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| 569. |
Which is the correct increasing order of ionisation energy ?A. `Li lt B lt Be`B. `Be lt B lt Li`C. `Li lt Na lt K`D. `O lt N lt F` |
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Answer» Correct Answer - A::D a. True. `IE_(1)` of `Be gt IE_(1)` of `B`, due to penetration effect. d. True. `IE_(1)` of `N gt IE_(1)` of `O`, due to half-filled configuration in `N`. |
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| 570. |
Name the two components of lichen. |
| Answer» Phycobiont (Alage) and Mycobiont (Fungi). | |
| 571. |
What are the physiological relationships between the algal and fungal components of lichen. |
| Answer» The fungus holds water, provides protection and ideal housing to the alga. The alga in return supplies carbohydrate food for the fungus. If the alga is capable of fixing nitrogen, it supplies fixed nitrogen to fungus. This type of physiological relationship between the algal and fungal component of lichen is called mutualistic symbiosis. | |
| 572. |
In which kingdom are the viruses placed ? |
| Answer» Correct Answer - None. | |
| 573. |
Name a composite organism having an alga and a fungus. |
| Answer» Correct Answer - Lichen. | |
| 574. |
Read the following statements and select the option which identifies the incorrect ones. (i) Potato spindle tuber disease and Chrysanthermum stunt disease are caused by viroids. (ii) `T_(4)` bacteriophage exhibits lytic cycle. (iii) Retroviruses have two copies of ssRNA. (iv) Interferous which prevent viral multiplication are glycolipid particles.A. ii and iiiB. i and ivC. iii onlyD. iv only |
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Answer» Correct Answer - D Interferons are proteins that increase the resistance of cells to attrack by virus.Interferons are produced commercially for therapeutic purposes using genetically engineered bacteria or human tissue culture. |
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| 575. |
Who proposed 5-kingdom classification ? |
| Answer» Robert H. Whittaker. | |
| 576. |
Which group of fungi is called algal fungi? |
| Answer» Correct Answer - Phycomycetes. | |
| 577. |
Which of the following statements about Euglena is correct?A. Euglena is a flagellate organism.B. Euglena when placed in continous darkness, loses its photosynthetic activity and dies.C. The pigments of Euglena are quite different from those of green plants.D. Euglena is a marine protist. |
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Answer» Correct Answer - A Euglenoids are unicellular flagellate protists commonly found in freshwater ponds, pools and moist mud. Though the euglenoids are photosynthetic in the presence of the light, when deprived of sunlight they behave like heterotophs by predating on smaller organisms (holozoic) or feeding on organic remains (saprobic). Such a mode of nutritions is called mixotrophic. Photosynthetic pigments of euglenoids are identical to those present in higher plants, e.g. chl a and chl b. |
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| 578. |
Which one of the following is a characteristic feature of ChrysophytesA. They are parasitic forms which cause disease in animalsB. They have a protein rich layer called pellicleC. They are commonly called diatomsD. They are saprophytic protists |
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Answer» Correct Answer - C Chrysophytes are commonly called diatoms. |
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| 579. |
Choose the wrong statement.A. Neurospora is used in the study of biochemical geneticsB. Morels and truffles are poisonous mushroomsC. Yeast is unicellular and useful in fermentationD. Penicillium is multicellular and produces antibiotics |
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Answer» Correct Answer - B Morels and truffles are edible mushrooms. |
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| 580. |
In which group of organisms the cell walls form two thin overlapping shells which fit togetherA. EuglenoidsB. DinoflagellatesC. Slime mouldsD. Chrysophytes |
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Answer» Correct Answer - D In Chrysophytes or diatoms the cell walls form two thin overlapping shells which fit together. |
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| 581. |
The cell wall is composed of two thin overlapping shells which fit together like a soap case inA. desmidsB. Diatoms and dinofiagellatesC. dinoflagellatesD. slime moulds. |
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Answer» Correct Answer - A The body of diatoms is covered by a transparent siliceous shell (silica deposited in cell wall) known as frustule. The frustule is made of two valves, epitheca and hypotheca. The two valves fit together like a soap box. |
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| 582. |
Choose the wrong statement :A. Yeast is unicellular and useful in fermentationB. Penicillium is multicellular and produces antiboticsC. Neurospora is used in the study of biochemical geneticsD. Morels and truffles are poisonous mushrooms |
| Answer» Correct Answer - D | |
| 583. |
Contagium vivum fluidum was proposed byA. DJ JvanowskyB. MW BeijernekC. StanleyD. Robert Hook |
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Answer» Correct Answer - B MW Beijernek proposed contagium vivum fluidum means contagious living fluid. This phrase was first used to describe virus, characteristic in escaping from the finest mesh available DJ Ivanowsky was a Russian Botanist who discovered the filterable nature of viruses and one of the founder of birology Stanley Miller was a Jewish Americal chemist experimented on orign of life Robert Hooke was the first to study and record cells using his primitive microscope. |
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| 584. |
All eukaryotic unicellular organisms belong toA. MoneraB. ProtistaC. FungiD. Bacteria. |
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Answer» Correct Answer - B All single-celled eukaryotes are palced in Kingdom Protista.Phylogenetically the Kingdom Protista acts as a connecting like between the prokaryotic Kingdom-Monera on one hand and the complex multicellular kingdoms -Fungi, Plantae and Animalia on the other hand. |
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| 585. |
A dikaryon is fomed whenA. Meiosis is arrestedB. The two haploid cells do not fuse immediatelyC. Cytoplasm does not fuseD. None of the above |
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Answer» Correct Answer - B A dikaryon is formed when the two haploid cells do not fuse immediately. |
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| 586. |
Which of the following statements is worng for viroidsA. They lack a protein coat.B. They are smaller than viruses.C. They cause infections.D. Their RNA is of high molecular weight. |
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Answer» Correct Answer - D Their RNA is of low molecular weight. |
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| 587. |
The primitive prokaryotes responsibel for the production of biogas from the dung of ruminant animals includeA. HalophilesB. ThermoacidophilesC. MethanogensD. Eubacteria |
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Answer» Correct Answer - C The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the methanogens. |
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| 588. |
Asseration : Two kingdom classification was insufficinet. Reason : Majority of organisms did not fall into either of the categories in two kingdom classification.A. If both assertion and reason and true and reason is the correct explanation of assertion.B. If both assertion and reason and true and 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. |
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Answer» Correct Answer - A Two kingdom classification (founded by linnaeus) worked well for a long time. But this system did not distinguish between the eukaryotes and prolaryotes, unicellular and multicuellular orgainisms, photosyntheitic and non-photosynthetic organism. Although. classification of organism (into plants and animals) was easily done and was easy to understant, but a large number of organisms did not fall into either category. Hence, the two kingdom classification used for a long time was found inadequate. |
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| 589. |
Asseration : Sporozoans may have silica shells on their surface. Reason : Shells of sporozoans help in protection from acidic environment of the host.A. If both assertion and reason and true and reason is the correct explanation of assertion.B. If both assertion and reason and true and 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. |
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Answer» Correct Answer - D Sporozoans are endoparasites. The body is covered with an elastic pellicle or cuticle. |
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| 590. |
Parasitic amoeboid protozoan isA. AmoebaB. TrypanosomaC. EntamoebaD. Paramoecium |
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Answer» Correct Answer - C Parasitic amoeboid protozoan is Entamoeba |
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| 591. |
Red tide is caused byA. DiatomsB. Slime mouldsC. BGAD. Dinoflagellates |
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Answer» Correct Answer - D Red tide is caused by Dinoflagellates. |
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| 592. |
In Amoeba locomotion is done byA. CiliaB. FlagellaC. ParapodiaD. Pseudopodia |
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Answer» Correct Answer - D In Amoeba locomotion is done by Pseudopodia (false feet). |
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| 593. |
Fungi producing 8 spheres in a sac belong to the classA. PhycomycetesB. AscomycetesC. BasidiomycetesD. Deuteromycetes |
| Answer» Correct Answer - B | |
| 594. |
Mushrooms, bracket fungi or puffballs are placed inA. AscomycetesB. BasidiomycetesC. DeuteromycetesD. Phycomycetes |
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Answer» Correct Answer - B Mushrooms, bracket fungi or puffballs placed in Basidiomycetes. |
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| 595. |
With respect to fungal sexual cycle, choose the correct sequence of eventsA. Karyogamy, Plasmogamy and MeiosisB. Meiosis, Plasmogamy and KaryogamyC. Plasmogamy, Karyogamy and MeiosisD. Meiosis, Karyogamy and Plasmogamy |
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Answer» Correct Answer - C Plasmogamy means fusion of protoplasm and karyogamy means fusion of nucleus. These two events lead to the formation of zygote (2n) which is diploid structure where meiosis takes place. |
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| 596. |
Ciliates differ from all other protozoans inA. using flagella for locomotionB. having a contractile vacuole for removing excess waterC. using pseudopodia for capturing preyD. having two types of nuclei |
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Answer» Correct Answer - D Ciliates differ from all other protozoans in having two types of nuclei. |
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| 597. |
Organise a discussion in your class on the topic- Are viruses living or non-living? |
| Answer» Viruses are microscopic organisms that have characteristics of both living and non- living. A virus consists of a strand of DNA or RNA covered by a protein coat. This presence of nucleic acid (DNA or RNA) suggests that viruses are alive. In addition, they can also respond to their environment (inside the host cell) in a limited manner. However, some other characters, such as their inability to reproduce without using the host cell machinery and their acellular nature, indicate that viruses are non-living. Therefore, classifying viruses has remained a mystery for modern systematics. | |
| 598. |
Why is manganin used for making standard resistors? |
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Answer» Due to high resistivity and low temperature coefficient of resistance, manganin wire (Cu–84% + Mn – 12% + Ni – 4%) is used in the preparation of standard resistances. |
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| 599. |
Give two uses of infrared rays. |
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Answer» (i) Infrared rays are used for producing dehydrated fruits. (ii) They are used in the secret writings on the ancient walls. (iii) They are used in green houses to keep the plants warm. |
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| 600. |
Give any two uses of infrared rays. |
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Answer» (i) Infrared radiation plays an important role in maintaining the Earth warm. (ii) Infrared lamps are used in physical therapy. (iii) Infrared detectors are used in Earth Satellites. (iv) These are used in taking photographs during the conditions of fog, smoke etc. |
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