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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.
| 351. |
The most likely reason for the development of resistence against pesticides in insects damaging a crop isA. Genetic recombinationB. Directed mutationsC. Acquired heritable chagesD. Random mutations |
| Answer» Correct Answer - D | |
| 352. |
Assertion :- XO type, XY type & ZW type are the example of male heterogamety. Reason :- Male produces two types of sperms.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - D | |
| 353. |
A gene located on Y-chromosme and therefore, transmitted from father to son is known as :-A. Supplementary geneB. Complementary geneC. Duplicate geneD. Holandric gene |
| Answer» Correct Answer - D | |
| 354. |
Assertion :- The activity of RNA polymerase at a pormotor is regulated by interaction with accessory protein, which affect its ability to recognise start sites. Reason : The accessibility of promotor ragion of prokaryotic DNA is in many cases is regulated by interactin of proteins with operators.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - B | |
| 355. |
Which antiotic inhibits interaction between t RNA and m RNA during bacterial synthesisA. EtythromycinB. NeomycinC. StreptomycinD. Tetracycline |
| Answer» Correct Answer - B | |
| 356. |
In which mode of inheritance do you except more maternal influence among the offspringA. AutosomalB. CytoplasmicC. Y-linkedD. X-linked |
| Answer» Correct Answer - B | |
| 357. |
Genetic code consists of -A. Adenine & CuanineB. Guanine & CytosineC. Cytosine & uracilD. All |
| Answer» Correct Answer - D | |
| 358. |
Gegeneeracy of genetic code was discovered by-A. Mc ClintockB. KhoranaC. OchoaD. Baurnfield & Nirenberg |
| Answer» Correct Answer - D | |
| 359. |
Genetic code was discovered by `:`A. Nirenberg & MatheiB. Kornberg & CrickC. Khorana & KornbergD. Gamow |
| Answer» Correct Answer - A | |
| 360. |
DNA is directly involved in the synthesis except that ofA. Another DNAB. t-RNA & m-RNAC. r-RNAD. Protein |
| Answer» Correct Answer - D | |
| 361. |
A codon in m-RNA has :-A. 3-basesB. 2-basesC. 1-baseD. Number of bases vary |
| Answer» Correct Answer - A | |
| 362. |
Consider the folowing sequence on m-RNA AUGGCAGUGCCA. Assuing that genetic code is overlap then how many number of codon may be present on this genetic codeA. 9B. 10C. 8D. 11 |
| Answer» Correct Answer - B | |
| 363. |
Similarity in DNA and RNA-A. Both are polymer of nucleotidesB. Both have similar pyrimidineC. Both have similar sugarD. Both are genetic material |
| Answer» Correct Answer - A | |
| 364. |
Length of one loop of B-DNA-A. `3.4 nm.`B. `0.34 nm.`C. `20 nm.`D. `10 nm.` |
| Answer» Correct Answer - A | |
| 365. |
Chemical mutagens are far more harzardous than radiations because :-A. The exposure to chemicals is more prevalentB. The organism possess protection for radiation but no protection for chemicalsC. The chemically induced matations are more deliteriousD. The chemicals are synthetics |
| Answer» Correct Answer - B | |
| 366. |
Extranuclear DNA is found in :-A. Lysosome and chloroplastB. Chloroplast and mitochondriaC. Mitochondria and lysosomeD. Golgi and E.R. |
| Answer» Correct Answer - B | |
| 367. |
Mutagens which are effective on replicating DNA only are :-A. Base analoguesB. Alkylating agentsC. `HNO_(2)`D. `alpha and beta` rays |
| Answer» Correct Answer - A | |
| 368. |
The following ratio is generally constant for a given speciesA. `A+G//C+T`B. `T+C//G+A`C. `G+C//A+T`D. `A+C//T+G` |
| Answer» Correct Answer - C | |
| 369. |
Which of the following agents cause mutation through deamination :-A. 2- AminopurineB. 5-Bromo uracil and X-raysC. `HNO_(2)`D. Allkyl sulphonates and mustary gas |
| Answer» Correct Answer - C | |
| 370. |
X-rays generally cause :-A. PolyploidyB. Frame shift mutationsC. Chromosomal aberrationsD. Paramutations |
| Answer» Correct Answer - C | |
| 371. |
H.J. Muller ws awarded Nobel Prize forA. Discovering linked genesB. Discovering the mutation induced by X-raysC. Hit studies on the genetics of DrosophilaD. Proving that DNA was a genetic material |
| Answer» Correct Answer - B | |
| 372. |
How many plants are dihybrid in `F_(2)` generation of dihybrid cross :-A. OneB. TowC. FourD. Sixteen |
| Answer» Correct Answer - C | |
| 373. |
Assertion :- On the basis of Punnett square, the `F_(2)` generation of dihybrid plant will produce 16 different types os genotypes. Reason:- In `F_(1)` generatin plant, there are four genotypes of gametes with a frequency of `25%` of total gametes produced.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - D | |
| 374. |
Some of the dominant traits studied by Mendel wereA. Round seed shape, constricted pod shape and axial flower positionB. Yellow seed colour, inflated pod shape and axial flower positionC. Yellow seed colour, violet flower colour and yellow pod colourD. Axial flower position, green pod colour and green seed colour |
| Answer» Correct Answer - B | |
| 375. |
Assertion :- According to Mendel, factors are stable & discrete units that control the expression or traits. Reason :- He could not provide any physical proof for the existance of factors.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - B | |
| 376. |
A woman with albinic father marries an albinic man. The proportion of her progeny isA. 2 normal : 1 albinicB. All normalC. All albinicD. 1 normal : 1 albinic |
| Answer» Correct Answer - D | |
| 377. |
In recent years,DNA sequences (nucleotide sequence) of maternal DNA and Y-chromosome were considered for the study of human evolution ,because :A. They are small, and therefore, easy to studyB. They are uniparental in orgin and fo not take part in recombinationC. Their sturcture is known in great detailD. They can be studies from the samples of fossil remains |
| Answer» Correct Answer - B | |
| 378. |
Inverse transcription was discovered by :-A. Watson and CrickB. khoranaC. Temin an BaltimorD. Meischer |
| Answer» Correct Answer - C | |
| 379. |
Linkage was discovered byA. BatesonB. MorganC. MullerD. Correns |
| Answer» Correct Answer - B | |
| 380. |
Unit of nucleic acids are -A. Phosphoric acidB. Nitrogenous basesC. Pentose sugarD. Nucleotides |
| Answer» Correct Answer - D | |
| 381. |
DNA was first discovered by-A. MeischerB. Robert BrownC. FlemmingD. Watson & Crick |
| Answer» Correct Answer - A | |
| 382. |
Which element is not found in nitrogenous base :-A. NitrogenB. HydrogenC. CarbonD. Phosphorus |
| Answer» Correct Answer - D | |
| 383. |
which of the following statements is not true of two genes that show 50 % recombination frequency ?A. If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosisB. The genes may be on different chromosomesC. The genes are tightly linkedD. The genes show independent assortment |
| Answer» Correct Answer - C | |
| 384. |
Which Mendelian idea is depricted by a cross in which the `"F"_(1)` generations resembles both the parents?A. co-dominanceB. incomplete dominanceC. Law of dominanceD. inheritance of one gene |
| Answer» Correct Answer - A | |
| 385. |
The incorrect statement with regard to haemophilia isA. A single protein involved in the clotting of blood is affectedB. It is a sex-linked diseaseC. It is a recessive diseaseD. It is a dominant disease |
| Answer» Correct Answer - D | |
| 386. |
If both the parents are carriers for thalassemia which is an autosomal recessive disorder what are fthe chances of pregnancy resulting in an affected childA. `100%`B. No chanceC. `50%`D. `25%` |
| Answer» Correct Answer - D | |
| 387. |
A class of mutation induced by addition or deletion of a nucleotide is called :-A. MissenesB. Non-senseC. SubstituationD. frame shift |
| Answer» Correct Answer - D | |
| 388. |
Protion of gene which is transcribed but not translated is :-A. exonB. intronC. cistronD. codon |
| Answer» Correct Answer - B | |
| 389. |
Which of the following is produced by E-Coli in the lactose operon.A. B galactosidaseB. TransacetylaseC. PermeaseD. All of the above |
| Answer» Correct Answer - D | |
| 390. |
Gene regulation governing lactose operon of E. coli that involves the lac I gene product isA. Negative and inducible because repressor protein prevents transcriptionB. Negetive and repressible because repressor protein prevents transcriptionC. Feedback inhibition because excess of `beta-`galactosidase can switch off trascipitionD. Positive and inducible because it can be induced by lactose |
| Answer» Correct Answer - B | |
| 391. |
E. cool cells with a muted z gene of the lack operon connot grow in medium conatining only lactose as to surce of energy because -A. They cannot synyhesize functionsl betagalctosidesB. They cannot transport lactose from the medium into the cellC. The lac operon is constitutively active in these cellsD. In the presentce of glucose, E. coil cells to not utilize lactose |
| Answer» Correct Answer - A | |
| 392. |
Assertion :- Lac opertor is present only in lac operon & it interact specifically with lac repressor only. Reason : Each operon has its specific operator & specific repressor.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - A | |
| 393. |
What would happen if in a gene encoding a polypeptide of 50 amino acids, `25^(th)` codon (UAU) is mutated to UA A?A. A plypeptides of 24 amino acids will be formedB. A polypeptides of 24 and 25 amino acids will be formedC. A polypeptide of 49 amino acids will be formedD. A polypeptide of 25 amino acids will be formed |
| Answer» Correct Answer - A | |
| 394. |
The first amino acid in any polypeptide chain of prokaryote is alwaysA. Formylated methionineB. Formylated arginineC. LysineD. Methionine |
| Answer» Correct Answer - A | |
| 395. |
Which is true for typtophan operon :-A. It is the example of inducible operonB. It is example of repressible operonC. on ` overset("co-repressor")to` ofD. 2 and 3 both are correct |
| Answer» Correct Answer - D | |
| 396. |
Removal of introns and joining of exons is calledA. CappingB. TailingC. SplicingD. All |
| Answer» Correct Answer - C | |
| 397. |
Assertion :- In a mosaic female cat orange and black patches of fur are present. Reason : At some place organe gane is supprossed and in some skin cells black gene is suppressed.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - A | |
| 398. |
Cross over value (COV) of gane A and B is `5%` while COV of ganes B and C is `15%` the possible sequence of these genes on chromosome is :-A. `A-B-C`B. `C-A-B`C. `B-C-A`D. Both (1) & (2) |
| Answer» Correct Answer - D | |
| 399. |
In case of inheritance of one gane, `3:1` phenotypic ratio can be explained on the basis of-A. Incomplete dominanceB. CondominanceC. DominanceD. Linkage |
| Answer» Correct Answer - C | |
| 400. |
Removal of introns and joining of exons in a defined order during transcription is called :A. CappingB. SplicingC. TailingD. Transformation |
| Answer» Correct Answer - B | |