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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.
| 7801. |
Question : Statement 1: Ephemerals are drought evaders.Statement 2: They are not true xerophytes. |
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Answer» Statement 1 is CORRECT. Statement 2 is incorrect. |
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| 7802. |
Question : Statement 1 : Euploidy involves entire sets of chromosomes Statement 2 : Aneuploidy involves individual chromosomes within a diploid set. |
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Answer» Statement 1 is CORRECT and Statement 2 is incorrect |
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| 7803. |
Question : Statement (1): Clones selection is carried out in asexually propagating plants. Statement (2): Clones show similar genotypes |
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Answer» (a) STATEMENT 1 is CORRECT and Statement 2 is incorrect |
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| 7804. |
Question : Statement 1 : DNA is a hydrophobic molecule. Statement 2 : T - DNA is a part of E - coli plasmid. |
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Answer» STATEMENT 1 is correct and Statement 2 is also correct. |
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| 7805. |
Question : Statement 1: Chinese discovered the paper. Statement 2: Eucalyptus and Casuarina are the widely used tree species for making paper pulp. |
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Answer» a) STATEMENT 1 is correct and Statement 2 is also correct |
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| 7806. |
Question : Statement 1 : Bioventing procedure increases O_2 flow to accelerate degradation of pollutants Statement 2 : Bioaugmentation uses microbes to recover metal pollutants from contaminated sites. |
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Answer» STATEMENT 1 is CORRECT and Statement 2 is ALSO correct. |
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| 7807. |
Question : Statement 1: Attenuated recombinant vaccines are live vaccines. Statement 2: Polio is a live vaccine. |
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Answer» Statement 1 is TRUE. Statement 2 is FALSE. |
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| 7808. |
Question : Statement 1: Arachis hypogea belongs to Fabaceae Statement 2: It is a native of Brazil. |
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Answer» a) Statement 1 is correct and Statement 2 is ALSO correct |
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| 7809. |
Question : Statement 1: Biodiversity is the assemblage of different life form. Statement 2: The term biodiversity was introduced by Edward Wilson. |
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Answer» Statement 1 is correct, statement 2 in incorrect |
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| 7810. |
Question : Statement 1: Andrographis paniculata is known as King of Bitters. Statement 2: The decoction of Andrographis is used against Diabetes mellitus. |
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Answer» a) STATEMENT 1 is CORRECT and Statement 2 is also correct |
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| 7811. |
Question : Statement 1: Aloe vera belongs to the family Asphodelaceae. Statement 2: Jasminum grandiflorum belongs to the family of Oleaceae. |
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Answer» a) Statement 1 is correct and Statement 2 is also correct |
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| 7812. |
Question : Statemeent A: carbonic anhydrase present in RBCs facililates the formation of bicarbonate ions at tissue level.Statement B: The same enzyme facilitates the formation of CO_2 in RBCs at alveoli level. |
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Answer» both STATEMENTS are CORRECT |
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| 7813. |
Question : Statement 1: ADA deficiency was the first disease treated by gene therapy. Statement 2: ADA is an autosomal recessive metabolie disorder. |
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Answer» Statement 1 is TRUE. Statement 2 is false. |
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| 7814. |
Question : [A] :In a Graafian follicle the primary oocyte and the follicle cells may be considered sib- ling cells.[R]: Both are derived from oogonia. |
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Answer» Both STATEMENTS 1 and 2 are CORRECT. |
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| 7815. |
Question : Write about Wiener hypothesis? |
| Answer» Solution :Wiener proposed the existence of eight alleles `(R^(1),R^(2),R^(0),R^(z),r,r^(1),r^(11),r^(y))` at a single Rh locus. All GENOTYPES CARRYING a dominant .R allele. `(R^(1),R^(2),R^(0),R^(z))`will produce .Rh- positive. PHENOTYPE and double recessive genotypes `(rr,rr^(1),rr^(11),rr^(y))`will give RISE to Rh- negative phenotype. | |
| 7816. |
Question : State whether the following statements are true or false.If false rewrite them correctly.First human-like creature was Homo erectus. |
| Answer» Solution :FALSE. First human like CREATURE was Homo HABILIS. | |
| 7817. |
Question : State whether the following statements are true or false.If false rewrite them correctly.Mesozoic era is known as age of amphibians. |
| Answer» SOLUTION :False.Mesozoic ERA is KNOWN as the AGE of REPTILES. | |
| 7818. |
Question : State whether the following statements are true or false.If false rewrite them correctly.Survival of the fittest and struggle for existence are related to Lamarckism. |
| Answer» SOLUTION :False.Survival of the FITTEST and struggle for existence are RELATED to Darwinism. | |
| 7819. |
Question : State whether the following statements are true or false The somatic cells of female have XX pair of sex chromosomes. |
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| 7820. |
Question : State whether the following statements are true or false. If false writethe correct statement. a. Thymine and cytosine are pyrimidines. b. The sequence of bases in a template strand does not determine the sequence of bases in the newly synthesised strand.c. The new strand formed in a continuous stretch of 5'-3' direction iscalled lagging strand.d. m-RNA is like a clover leaf.e. AUG is a terminating codon. |
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Answer» Solution :a. True b. False. The sequence of BASES in a template STRAND determines thesequence of bases in the newly synthesised strand. c. False. The NEW strand FORMED in a continuous stretch of 5. - 3. direction is called leading strand. d. False. mRNA is linear. e. False. AUG is an initiation codon. |
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| 7821. |
Question : State whether the following statements are true or false First chromosome map was constructed by Sturtevant. |
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| 7822. |
Question : State whether the following statements are true or false Down's syndrome is caused by the trisomy of the 10 thpair of chromosome. |
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| 7823. |
Question : State whether the following statements are true or false A chromosome is mostly made up of RNA |
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| 7824. |
Question : Define Van't Hoff factor. |
| Answer» Solution :Van.t Hoff.s RULE states that with the increase of every `10^@C`, the rate of metabolic activity is doubled or the reaction rate is HALVED with the DECREASE of `10^@C.` | |
| 7825. |
Question : State what happens when an alien DNA is ligated at Pvu I site of pBR 322 plasmid. |
| Answer» SOLUTION :The transformant loses ampicilin RESISTANCE due to the insertion of alien DNA at PVU I site of `amp^R`. | |
| 7826. |
Question :State Van't Hoff's rule. |
| Answer» SOLUTION :Van.t Hoff.s rule states that with the INCREASE of every `10^(@)C`, the rate of METABOLIC activity is DOUBLED or the reaction rate is halved with the decrease of `10^(@)C.` | |
| 7827. |
Question : State two important defense mechanisms in plants against herbivory, with an example each. |
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Answer» Solution :Plants have evolved an astonishing VARIETY of morphological and chemical defenses against herbivores. Thorns (Acacia, Cactus) are the most common morphological means of defence. Many plants produce and store chemicals that make the herbivore sick when they are eaten, inhibit feeding or digestion, disrupt its reproduction or even kill it. The weed Calotropis growing in ABANDONED fields. The plant produces highly POISONOUS cardiac glycosides and that is why you NEVER see any cattle or goats browsing on this plant. A wide variety of chemical substances that we extract from plants on a commercial scale (nicotine, caffeine, quinine, strychnine, opium, etc.,) are produced by them actually as defenses against grazers and browsers. |
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| 7828. |
Question : State true(T) or false(F) to the given statements and select the correct option. ( a ) Annual rings are distinct in plants growingin temperate regions. ( b ) Lenticels occur in most woody trees and permit the exchange of gases. ( c ) Due to stelar secondary growth, central cylinder of wood surrounded by secondary phloem is formed. ( d ) The cells of endodermis opposite to protoxylem divide to give rise vascular cambium in dicot roots. |
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Answer» a(T), B(T), C(F), d(F) |
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| 7829. |
Question : State true(T) or false(F) to the given statements and select the correct option. ( a ) All tissue layers exterior to the vascular cambium constitute bark. ( b ) Root podermis is sclerenchymatous. ( c ) Ground tissue of leaves is called mesophyll. ( d ) Due to presence of casparian strips, endodermis is impervious to water. |
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Answer» ( a ) T, ( B ) F, ( C ) F, ( d )T |
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| 7830. |
Question : State true (T) of false (F) for the given statements and select the correct option (a) 7 celled - 8 nucleated female gametophyte of angiosperms is fromed only by monosporic development (b) Multiplication by fragmentation is observed in filamentous fungi , filamentous algae and protonema ofmosses . ( c) water is required for transfer of male gametes in Vallisneria plant |
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Answer» a(F), b(T), c(F) In angiosperms , functional magaspore undergoes 3 mitotic division to PRODUCE 7 CELLED 8 nucleated embryo sac. |
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| 7831. |
Question : State true(T) or false (F) and choose the correct option. phosphorus is absorbed by the plants from the soil in the from of phosphate ions. cystine and methionine are sulphur containin g amion acids. iron is an important of ferredoxin. |
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Answer» T,F,T |
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| 7832. |
Question :State True/False with explanation (a) Abortions could happen spontaneously too. (True/False) (b) Infertility is defined as the inability to produce a viable offspring and is always due to abnormalities/defects in the female partner. (True/False) (c) Complete lactation could help as a naturals E method of contraception. (True/False) (d) Creating awareness about sex related aspects is an effective method to improve reproductive health of the people. (True 2 False) |
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Answer» Solution :(a) False : Abortion can be DONE due to many REASONS mostly it is induced. (B) False : INFERTILITY is due to deficiency of EITHER male or female. (c) True (d) True |
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| 7833. |
Question : State the two principal outcomes of the experiements conducted by Louis on origin of life. |
| Answer» Solution :Life COMES from pre-existing life/biogensins(II) DISMISSED the CONCEPT of SPONTANEOUS generation. | |
| 7834. |
Question : State the three characteristics of Acquired Immunity. List the different ways by which it can be attained by humans. |
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Answer» SOLUTION :The following are the characteristics of ACQUIRED immunity. (i) It is PATHOGEN specific. (ii) It is characterized by memory. (iii) Responses can be characterized as a primary response of low intensity and an intensified secondary or anamnestic response. Acquired immunity can be attained in the following ways : (i) ACTIVE immunity : Here ANTIBODIES are produced in the host body in response to dead or liviing microbes or other proteins. Here onset of response in slow. (ii) Passive immunity : Here ready made antibodies are directly given to product the body against foreign agents. |
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| 7835. |
Question : State the theory of abiogenesis. How does Miller's experiment support this theory? |
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Answer» Solution :Stanley Miller and HAROLD Urey in 1953 performed on experiment to clearly demonstrate that ultraviolet radiations or electrical discharges or a combination of these can produce complex organic compounds from a mixture of `CH_4, NH_3,H_2` and water vapour `(H_2O)` at `800^@C`. Electric discharge was created in a closed flask containing `CH_4,NH_3, H_2` in the ratio `2 : 1 : 2` as shown in figure.  The conditions were set SIMILAR to those of the primitive atmosphere in the laboratory. He OBSERVED formation of amino acids while in similar experiments performed by other scientists the presence of complex molecules like sugar, pigments, nitrogen bases and fats in the flask were also observed. Thus, Miller-Urey experiment supported the theory of abiogenesis followed by chemical evolution. Analysis of meteorite content also revealed similar compound indicating that similar processes are occurring elsewhere in space. Thus with these limited EVIDENCES, the idea of chemical evolution was more or less ACCEPTED. |
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| 7836. |
Question : State the source of statins and its medical role. |
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Answer» Solution :Statins is obtained from Monascus Purpureus (YEAST fungus). It COMPETITIVELY INHIBITS the enzyme responsible for cholesterol synthesis there by reducing the blood cholesterol LEVEL. |
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| 7837. |
Question : State the significance of sporopollenin. |
| Answer» Solution :The wall material sporopollenin is contributed by both pollen cytoplasm and tapetum . It is derived from carotenoids . It is resistant to physical and biological DECOMPOSITION . It helps to withstand high TEMPERATURE and is resistant to STRONG acid , alkali and enzyme action. Hence , it preserves the pollen for long PERIODS in fossile deposits, and it also protects pollen for long periods in fossil deposits, and it also protects pollen during its journey from ANTHER to stigma. | |
| 7838. |
Question : Explain ten percent law with an example. |
| Answer» Solution :Ten PERCENT law states that during TRANSFER of food energy from one trophic LEVEL to other, only about 10% stored at every level and rest of them (90%) is LOST in respiration, decomposition and in the form of heat | |
| 7839. |
Question : State the salient features of genetic code. |
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Answer» Solution :The salient features of genetic code are as follows: (i) The codon is TRIPLET. 61 codons code for amino acids and 3 codons do not code for any amino acids, hence they function as stop codons. (ii) One codon codes for only one amino acid, hence, it is unambiguous and specific, (iii) Some amino acids are coded by more than one codon, hence the code is degenerate. (iv) The codon is read in mRNA in a contiguous fashion. There are no punctuations. (v) The code is nearly universal : for example, from bacteria to human UUU WOULD code for phenylalanine (phe). Some exceptions to this rule have been found in mitochondrial codons and in some protozoans. AUG has dual functions. It codes for Methionine (met) and it ALSO act as initiator codon. |
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| 7840. |
Question : State the second law of thermodynamics. |
| Answer» Solution :Second law of THERMODYNAMICS states that energy transformation results in the reduction of the free energy of the system. Usually energy transformation cannot be 100% efficient. As energy is transferred from ONE ORGANISM to another in the form of food, a portion of it is stored as energy in living tissue, whereas a large part of energy is dissipated as HEAT through respiration. The transfer of energy is irreversible NATURAL process. | |
| 7841. |
Question : State the role of Somatostatin and Somatotropin in human beings. |
| Answer» Solution :Both somatostatin and somatotropin are peptide hormones which helps in growth and development by INCREASING the uptake of AMINO acids and PROMOTING PROTEIN synthesis. | |
| 7842. |
Question : State the role of relaxin. |
| Answer» Solution :Relaxin is an hormone secreted by the placenta during the later phase of PREGNANCY. It helps in relaxation of PELVIS during child birth. | |
| 7843. |
Question : State the role of following codons in translation process (a) AUG (b) UAA |
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Answer» Solution :a) AUG is the INITIATOR CODON and also CODES for METHIONINE. B) UAA is a terminator codon. |
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| 7844. |
Question : State the role of Government in controlled Noise pollution. |
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Answer» Solution :Article 48-A and Article 51-A of the Constitution of India, NOISE POLLUTION (Regulation and Control) Rules 2000, and Tamil NADU State Environment Policy 2017 are some of the legal relief from noise pollution. ACCORDING to Noise Pollution (Regulation and Control) Rules, 2000, the permissible limit of noise in areas categorized as commercial is 65 decibels (dB) during day and 55 dB during night. |
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| 7845. |
Question : State the role of herbivores and microconsumers in a terrestrial ecosystem. |
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Answer» Solution :(a) HERBIVORES acts as PRIMARY consumers of producers (PLANTS). (b) Microconsumers decomposes the dead remains and excreta of plants and ANIMALS. |
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| 7846. |
Question : State the role of cryoprotectants in conservation of plant resources. |
| Answer» SOLUTION :Cryoprotectants are the protective agents that are used to protect the cells or tissues from the STRESS of FREEZING temperature. E.g: SUCROSE. | |
| 7847. |
Question : State the role of filiform apparatus found in embryo sac of angiosperm. |
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Answer» SOLUTION :(a) Filiform apparatus HELPS in absorption conduction of NUTRIENTS from nucellus to EMBRYO sac (b) It guides the pollen tube into the egg. |
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| 7848. |
Question : State the role of C peptide in human insulin. |
| Answer» Solution :The C-peptide is an extra POLYPEPTIDE stretch present in HUMAN pro-insulin. This C-peptide is removed on MATURATION of pro-insulin to insulin. C-peptide in efficient assembly FOLDING processing of insulin. | |
| 7849. |
Question : State the role of Biosphere Reserve. |
| Answer» SOLUTION :Biosphere Reserves are DESIGNATED to DEAL with the conservation of biodiversity, ECONOMIC and social development and maintenance of associated cultural values. | |
| 7850. |
Question : State the principle underlying 'gel electrophoresis' and mention the applica-tion of this technique in biotechnology . |
| Answer» Solution :The principle UNDERLYING gel electrophoresis isthat when a bio-molecule like DNA is placed in a gel MATRIX (agarose gel) under an electric field , the molecule separates according to theircharge and size. It Is widely used in the separation of FRAGMENTS produced as a result of restriction endonuclease digestion. | |