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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. |
Which ONE of the following statement is INCORRECT about restriction endonucleases ?A. They serve as primitive form of immune system in bacteriaB. They digest the DNA non-randomly.C. They digest the DNA at specific location.D. They digest the DNA from free ends. |
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Answer» Correct Answer - D Endonucleases do not cut from free ends. |
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| 552. |
The number of net ATP molecules produced from I glucose molecule during glycolysis isA. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - B In glycolysis net ATP produced =4-2=2 ATP |
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| 553. |
The largest perfect square that divides `2014^(3)-2013^(3)+2012^(3)-2011^(3)+ . . . +2^(3)-1^(3)` isA. `1^(2)`B. `2^(2)`C. `1007^(2)`D. `2014^(2)` |
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Answer» Correct Answer - C `2{(2014)^(3)+(2012)^(2)_ . . . +}-{(2014)^(3)+(2013)^(3)+ . . .1^(3)}` `=2xx8{(1007)^(2)+(1006)^(2)+ . . . +1^(3)}-{(2014)^(3)+(2013)^(3)+ . . .+1^(3)}` `=2xx8xx(((1007)(1008))/(2))^(2)-(((2014)(2015))/(2))^(2)` `=2xx8xx((1007)^(2)(1008)^(2))/(4)-((2014)^(2)(2015)^(2))/(4)` `=(1007)^(2)(2016)^(2)-(1007)^(2)(2015)^(2)` `(1007)^(2){2016-2015}{2016+2015}` `(1007)^(2)(4031)` =divisible by `(2007)^(2)` |
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| 554. |
Among Mg , Cu ,fe ,Zn , the metal that does not produce hydrogen gas in reaction with hydrochloric acid isA. CuB. ZnC. MgD. Fe |
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Answer» Correct Answer - A Cu is present below `H_(2) ` in electrochemical series so it can not produce `H_(2)` gas in reaction with Hcl |
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| 555. |
How many six-digit numbers are there in which no digit is repeated, even digits appear at even places, odd digits appear at odd places and the number is divisible by 4 ? (A) 3600 (B) 2700 (C) 2160 (D) 1440 |
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Answer» Correct Option :-(D) 1440 Explanation :-
(1,3,5,7,9) (2,6) 3 × 3 × 4 × 4 × 5 × 2 = 1440 |
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| 556. |
The number of natural numbers n in the interval `[1005, 2010]` for which the polynomial `1+x+x^(2) + x^(3) + "….."x^(n-1)` divides the polynomial `1 + x^(2) + x^(4) + x^(6) + "……"x^(2010)` is -A. `0`B. `100`C. `503`D. `1006` |
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Answer» Correct Answer - C `1 + x^(2) + x^(4)"....."x^(210) = (1(1-x^(210)))/(1-x^(2)) = ((1-x^(1006))(1+x^(1006)))/((1-x)(1+x))` `= (1+x^(1006))(((1-x^(503)))/((1-x)))(((1+x^(503)))/((1+x)))` `=(1+x^(1006))(1+x+x^(2)+"...."x^(502))(1-x+x^(2)-x^(3)+"....."x^(502))` that is divisible by `1+ x + x^(2) + "...."x^(n-1)` If ` n - 1 = 502` `n = 503` |
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| 557. |
Let a0 = 0 and ax = 3an–1 + 1 for n ≥ 1. Then the remainder obtained dividing a2010 by 11 is- (A) 0 (B) 7 (C) 3 (D) 4 |
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Answer» Correct Option :- (A) 0 Explanation :- an = 3an–1 + 1 a2010 = 3a2009 + 1 = 3(3a2008 + 1) + 1 = 32 a2008 + 3 + 1 = 33 a2007 + 3 + 3 + 1 . . . . 32010 a0 +(3 + 3 + ...3) + 1 ------{2009 times} = 0 + 6027 + 1 = 6028 Remainder (6028/11) = 0 |
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| 558. |
A scientist has a house just beside a busy highway. He collects leaves from some plants growing in his garden to do radio-carbon dating (to estimate the age of the plant by estimating the amount of a radioisotope of carbon in its tissues). Surprisingly the radio-carbon dating shows that the plant is a few thousand years old. (a) Was the result of the radio-carbon dating wrong or can you propose a reason for such an observation ? (b) What simple experiment can be done to test the reason that you have proposed ? |
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Answer» Sol. (a) The result of the radio-carbon dating was correct. Reason : Vehicles running on the highway beside the house emitted carbon dioxide from the combustion of petrol or diesel, which are fossil fuels. The carbon in this carbon dioxide, coming from living material that has been converted into petroleum millions of years ago, would get assimilated into the tissues of the plant as it uses carbon dioxide from the surrounding atmosphere for photosynthesis. Therefore tissues of the plant, when used for radio-carbon dating, would show the age of the plant to be many thousands of years old. (b) A simple experiment to test the validity of this explanation would be to collect seeds from the plant and grow them in a plot of land away from the highway or other sources of carbon dioxide coming from the burning of fossil fuels. Radio-carbon dating of plants growing from these seeds should show them as young plants. |
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| 559. |
The gall bladder is involved inA. synthesizing bileB. storing and secreting bileC. degrading bileD. producing insulin |
| Answer» Correct Answer - B | |
| 560. |
which one of the following is deterimental to soil fertility ?A. Saprophytic bacteriaB. NitrosomonasC. NitrobacterD. Pseudomnas |
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Answer» Correct Answer - D Pseudomonas denitrificans is involved in formation of elemental `N_(2) ` from nitrogen compound ( denitrification). |
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| 561. |
Blood clotting involves the conversion ofA. prothrombin to thromboplastinB. thromboplastin to prothrombinC. fibrinogen to fibrinD. fibrin to fibrinogen |
| Answer» Correct Answer - C | |
| 562. |
Widal test is used for susceptibility ofA. TyphoidB. PneumoniaC. MalariaD. Filaria |
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Answer» Correct Answer - A Widal test is for typhoid |
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| 563. |
In which phylum of the body is segmentedA. PoriferaB. PlatyhelminthesC. AnnelidaD. Echinodermata |
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Answer» Correct Answer - C Metamareic segmentation is present in (i) Annelida (2) Arthropoda (3) chordata |
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| 564. |
Let a, b, c be positive integers such that `(asqrt2+b)/(bsqrt2+c)` is a rational number, then which of the following is always an integer?A. `(2a^(2)+b^(2))/(2b^(2)+c^(2))`B. `(a^(2)+2b^(2))/(b^(2)+2c^(2))`C. `(a^(2)+b^(2)-c^(2))/(a+b+c)`D. `(a^(2)+b^(2)+c^(2))/(a+b-c)` |
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Answer» Correct Answer - D `((asqrt2+b)/(bsqrt2+c))((bsqrt2-c)/(bsqrt2-c))=(2ab-sqrt2ac+sqrt2b^(2)-bc)/(2b^(2)-c^(3))=(b(2a-c)+sqrt2(b^(2)-ac))/(2b^(2)-c^(2))` Is rational when `b^(2)` ac i.e., a, b, c are in GP Here given option (A), (B), (C) does not satisfy the criteria But option (D) always satisfy |
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| 565. |
Which ONE of the following properties causes the plant tendrils to coil around a bamboo stick? (A) Tendril has spines (B) The base of the tendril grows faster than the tip (C) Part of the tendril in contact with the bamboo stick grows at a slower rate than the part away from it (D) The tip of the tendril grows faster than the base |
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Answer» Correct option (C) Part of the tendril in contact with the bamboo stick grows at a slower rate than the part away from it Tendrils are sensitive to touch when they come in contact with the object does not grow rapidally as the part of the tendril away from the object. This cause the tendril to circle around the object & thus cling to it. |
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| 566. |
A 750 W motor drivers a pump which lifts 300 litres of water per minute to a height of 6 meters. The efficiency of the motor is nearly (take acceleration due to gravity to be `10 m//s^(2))`A. 0.3B. 0.4C. 0.5D. 0.2 |
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Answer» Correct Answer - B |
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| 567. |
Two charges `+Q " and " -2Q` are located at points A and B on a horizontal line as shown below The electric field is zero at a point which is located at a finite distance A. on the perpendicular bisector of ABB. left of A on the lineC. between A and B on the lineD. right of B on the line |
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Answer» Correct Answer - B |
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| 568. |
The amino acid sequences of a bacterial protein and a human protein carrying out similar function are found to be `60%` identical. However the DNA sequences of the genes coding for these proteins are only `45%`identical. This is possible because :-A. Protein sequence does not depend on DNA sequence.B. DNA codons having different nucleotides in the third position can code for the same amino are foundC. DNA codons having different nucleotides in the second position can code for the same amino acidsD. Same DNA codons can code for multiple amino acids |
| Answer» Correct Answer - B | |
| 569. |
The amino acid sequences of a bacterial protein and a human protein carrying out similar function are found to be `60%` identical. However the DNA sequences of the genes coding for these proteins are only `45%`identical. This is possible because :-A. Protein sequence does not depend on DNA sequence.B. DNA codons having different nucleotides in the third position can code for the same amino are foundC. DNA codons having different nucleotides in the second position can code for the same amino acidsD. Same DNA codons can code for multiple amino acids |
| Answer» Correct Answer - B | |
| 570. |
Which of the following correctly represents the results of an enzymatic reaction? Enzyme is E, substrate is S and products are `P_(1)` & `P2`.A. `P1 + S hArr P2 + E`B. `E + S hArr P1 + P2`C. `P1 + P2 + E hArr S`D. `E + S hArr P1 + P2 + E` |
| Answer» Correct Answer - D | |
| 571. |
Which of the following correctly represents the results of an enzymatic reaction ? Enzyme is E, substrate is S and products are P1 & P2. (A) P1 + S ⇔ P2 + E (B) E + S ⇔ P1 + P2 (C) P1 + P2 + E ⇔ S (D) E + S ⇔ P1 + P2 + E |
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Answer» Correct Option :- (D) E + S ⇔ P1 + P2 + E |
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| 572. |
Two students are given two different double stranded DNA molecules of equal length. They are asked to denature the DNA molecules by heating. The DNA given to student A has the following composition of bases (A:G:T:C:35:15:35:15) while that given to student B is (A:G:T:C::12:38:12:38). Which of the following statements is true ? (A) Both the DNA molecules would denature at the same rate (B) The information given is insufficient to draw any conclusion (C) DNA molecule given to student B would denature faster than that of student A (D) DNA molecule given to student A would denature faster than that given to student B |
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Answer» Correct Option :- (D) DNA molecule given to student A would denature faster than that given to student B |
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| 573. |
Two students are given two different double stranded DNA molecules of equal length. They are asked to denature the DNA molecules by heating. The DNA given to student A has the following composition of bases `(A:G:T:C:35:15:35:15)` while that given to student B is `(A:G:T:C::12:38:12:38)`. Which of the following statements os true?A. Both the DNA molecules would denature at the same rateB. The information given in insufficient to draw any conclusionC. DNA molecule given to student B would denature faster than that of student AD. DNA molecule given to student A would denature faster than that given to students B |
| Answer» Correct Answer - D | |
| 574. |
Which ONE of the following statements about mitosis is CORRECT ?A. One nucleus gives rise to 4 nucleiB. Homologous chromosomes synapse during anaphaseC. The centromeres separate at the onset of anaphaseD. Non-sister chromatids recombine |
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Answer» Correct Answer - C In anaphase sister chromatids seperates from centromeres so number of chromosome becomes double. |
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| 575. |
Which one of the following organelles can synthesize some of its own proteins? (A) lysozome (B) golgi apparatus (C) vacuole (D) mitochondrion |
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Answer» Correct option (D) mitochondrion Explanation: Mitochondria is called a semi-autonomous organelle, having its own DNA, RNA and 70 S type of ribosomes, by which it can synthesize some of its proteins. |
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| 576. |
Maltose is a polymer of – (A) one glucose and one fructose molecule (B) one glucose and one galactose molecule (C) two glucose molecules (D) two fructose molecules |
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Answer» Correct option (C) two glucose molecules Explanation: Maltose also known as maltobiose or malt sugar, is a disaccharide formed of 2 units of glucose joined with an a(1 → 4) bond. |
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| 577. |
Gaseous exchange of oxygen and carbon dioxide between alveolar air and capillaries takes place by (A) Active transport (B)Diffusion (C) Carrier-mediated transport (D) Imbibition |
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Answer» Correct Option :- (B)Diffusion Explanation :- By diffusion along concentration gradient |
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| 578. |
Which ONE of the following statements about mitosis is CORRECT ? (A) One nucleus gives rise to 4 nuclei (B) Homologous chromosomes synapse during anaphase (C) The centromeres separate at the onset of anaphase (D) Non-sister chromatids recombine |
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Answer» Correct Option :-(C) The centromeres separate at the onset of anaphase Explanation :- In anaphase sister chromatids seperates from centromeres so number of chromosome becomes double. |
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| 579. |
A 100 mark examination was administered to a class of 50 students. Despite only integer marks being given, the average score of the class was 47.5. Then, the maximum number of students who would get marks more than the class average is (A) 25 (B) 35 (C) 45 (D) 49 |
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Answer» Correct option (D) 49 Explanation: Total marks of students = 50 × 47.5 = 2375 If 48 marks are obtained by students then max. No. of students can be = 2375/48 = 49.479 Means no. of students are 49. |
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| 580. |
Lets be the sum of the digits of the number `15^(2)xx5^(18)` in base 10. ThenA. s lt 6B. `6inslt140`C. `140inslt148`D. `sin148` |
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Answer» Correct Answer - B `15^(2)xx5^(18)` `=9xx5^(20)` `[log_(10)(9xx5^(20))]=[2log_(10)^(3)+20log_(10)5]` `=[2xx4771+20(1-0.3010)]` `=14" {characteristic}"` Hence the number have 15 digits At worst all digits can have value 9 Hence sum should less than 135 And the last digit should be 5 Hence Sum should greater than Or equal to 6 |
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| 581. |
For a real number r let [r] denote the largest integer less than or equal to r. Let `agt1` be a real number which is not an integer and let k be the smallest positive integer positive integer such that `[a^(k)]gt[a]^(k)`. Then which of the following statements is always true?A. `kle2([a]+1)^(2)`B. `kle2([a]+1)^(4)`C. `kle2^([a]+1)`D. `kle(1)/(a-[a])+1` |
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Answer» Correct Answer - B By talking different values of a & k. options (B) is possible. |
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| 582. |
A total solar eclipse is observed from the earth. At the same an observer on the moon views the earth. She is most likely to see (E denotes the earth) A. aB. bC. cD. d |
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Answer» Correct Answer - B |
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| 583. |
Ice in a freezer is at `–7^(@)C`. 100 g of this ice is mixed with 200 g of water at 15°C. Take the freezing temperature of water to be 0°C, the specific heat of ice equal to `2.2 J//g .^(@)C`, specific heat of water equal to `4.2 J//g .^(@)C`, and the latent heat of ice equal to 335 J/g. Assuming no loss of heat to the environment, the mass of ice in the final mixture is closest toA. 88 gB. 67 gC. 54 gD. 45 g |
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Answer» Correct Answer - B |
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| 584. |
If ` x + 1/x = a, x^(2)+1/x^(3) = b," then "x^(3) + 1/x^(2)` is-A. `a^(3)+a^(2)-3a-2-b`B. `a^(3)-a^(2)-3a+4-b`C. `a^(3)-a^(2)+3a-6-b`D. `a^(3)+a^(2)+3a-16-b` |
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Answer» Correct Answer - A `x+1/x=a and x^(2)+1/x^(3)=b` `(x+1/x)^(2)=a^(2) rArr x^(2)+1/x^(2)+2=a^(2) ...(1)` `and (x+1/x)^(3)=a^(3) rArr x^(3)+1/x^(3)+3x. 1/x(x+1/x)=a^(3)...(2)` adding (1) &(2) `(x^(2)+1/x^(3))+(x^(3)+1/x^(2))+2+3(x+1/x)=a^(2)+a^(3)` `b+(x^(3)1/x^(2))+2+3a=a^(2)+a^(3)` `:. x^(3)+1/x^(2)=a^(3)+a^(2)-3a-2-b` |
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| 585. |
Let a,b,c,d be real numbers such that |a-b|=2, |b-c|=3, |c-d|=4 Then the sum of all possible values of |a-d|=A. 9B. 18C. 24D. 30 |
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Answer» Correct Answer - B `|a-b|=2 rArr a-b= pm 2` `|a-c|= 3 rArr b-c= pm 3` `|c-d|=4 rArr c-d = pm 4` Possible values of `a-d" are "pm 9, pm 5, pm 3, pm 1` `|a-d| =9, 5, 3, 1` Sum = 18. |
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| 586. |
Testoterone is secreted by which endocrine part of testis?A. Leydig cellsB. Seminiferous tubulesC. Tunica albugeniaD. Sertoli cells |
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Answer» Correct Answer - A Leydig cells or Interstitial cells of testes secetes testosteron hormone |
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| 587. |
A Cross was carried out between two individuals heterozygous for two pairs genes was carried out. Assuming segregation and independent assonment the number of different genotype and phenotype obtained respectiveiy would be ? A. 4 and 9B. 6 and 3C. 9 and 4D. 11 and 4 |
| Answer» Correct Answer - C | |
| 588. |
The rate constant of a chemical reaction at a very high temperature will approachA. Arrhenius frequency factor divided by the ideal gas constantB. activation energyC. Arrhenius freqency factorD. activation energy divided by ideal by the ideal gas constant |
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Answer» Correct Answer - C `K=Ae^(Ea//RT)` `Ttoook=A` |
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| 589. |
The standard reduction potantials (in V) of a few metal ion/metal electrodes are given below. `Cr^(3+)//Cr=-0.74,Cu^(2+)//Cu=+0.34,Pb^(2+)//Pb=-0.13,Ag^(+)//Ag=+0.8`. The reducing strength of the metals follows the orderA. `AggtCugtPbgtCr`B. `CrgtPbgtCugtAg`C. `PbgtCrgtAggtCu`D. `CrgtAggtCugtPb` |
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Answer» Correct Answer - B `"SRP"darr"Reducing power"uarr` |
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| 590. |
Optical activity of DNA is due to its (A) Bases (B) Sugars (C) Phosphate (D) Hydrogen bonds |
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Answer» Correct Option :- (B) Sugars Explanation :- Fact based questions |
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| 591. |
Scurvy is caused by the deficiency of (A) Nicotinic acid (B) Ascorbic acid (C) Pantothenic acid (D) Retinoic acid |
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Answer» Correct Option :-(B) Ascorbic acid Explanation :- Ascorbic acid is required for a variety of biosynthetic pathway. It is required for collagen synthesis during wound healing. |
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| 592. |
Serine proteases are called so because they (A) require free serine for their activity (B) cleave after serine residues in the substrate (C) are inhibited by the presence of free serine (D) have a serine residue at their active site |
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Answer» Correct option (D) have a serine residue at their active site Explanation: Serine proteases have serine residue at their active side. Serine proteases (serine endopeptidases) are enzymes that cleave peptide in protein, inwhich serine serves as the nucleophilic amino acid at the (enzymes) active site.
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| 593. |
The maximum number of genotypes of the pollens produced by a tall pea plant with round, yellow seeds of the genotype TtRrYY, if the three loci are unlinked, would be (A) 1 (B) 2 (C) 4 (D) 8 |
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Answer» Correct option (C) 4 Explanation: Given plant is dihybrid T t Rr YY so that total No. Of gamete 2n , here n = 2, 22 = 4 = max. no. of pollen |
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| 594. |
A flower with Tt genotype is cros-pollinated by TT pollens. What will the genotypes of the resulting endosperm and embryo, respectively, be?A. TTT,(TT+Tt)B. (TTT+TTt)C. TTt,TtD. TTt,(TT+Tt) |
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Answer» Correct Answer - A `TtxxTT` (Pollen means male plant) `"Endosperm" rarrubrace(2"polar nuclei")_("female")+("should be same")+1"male nuclei"` So, TTT `"Embryo"rarrubrace("Egg cell")_("female")+1 "male cuclei"` So, eithr TT or Tt |
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| 595. |
Serine proteases are called so because they ?A. Require free serine for their activityB. Cleave after serine residues in the substrateC. Are inhibited by the presence of free serineD. Have a serine residue at their active site |
| Answer» Correct Answer - D | |
| 596. |
ONE of the following statements is TRUE with respect to human ovary ?A. Estrogen is secreted by Graffian follicles and progesterone by corpus lutemB. Estrogen is secreted by cropus luteum and progesterone by Graafian folliclesC. Both estrogen and progesterone are secrted by Graafian folliclesD. Both estrogen and progesterone are secreted by corpus luteum |
| Answer» Correct Answer - A | |
| 597. |
A water molecule can from a maximum of ………. hydrogen bonds. (A) 1 (B) 2 (C) 3 (D) 4 |
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Answer» Correct Option :- (D) 4 |
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| 598. |
Circadian Rhythm is an endogenously driven cycle for biochemical, physiological and behavioral processes. In humans, the approximate duration of this 'biological clock' is- (A) 1 Hour (B) 6 Hours (C) 12 Hours (D) 24 Hours |
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Answer» Correct Option :- (D) 24 Hours |
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| 599. |
A stone thrown down with a seed u takes a time `t_(1)` to reach the ground , while another stone, thrown upwards from the same point with the same speed, takes time `t_(2)`. The maximum height the second stone reaches from the ground isA. `.^(1//2)g t_(1)t_(2)`B. `g//8(t_(1)+t_(2))^(2)`C. `g//8(t_(1)-t_(2))^(2)`D. `.^(1//2)g t_(2)^(2)` |
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Answer» Correct Answer - B |
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| 600. |
Insects constitute the largest animal group on earth. About 25-30% of the insect species are known to be herbivores. In spite of such huge herbivore pressure, globally, green plants have persisted. one possible reason for this persistence is – (A) Food preference of insects has tended to change with time (B) Herbivore insects have become inefficient feeders of green plants (C) Herbivore population has been kept in control by predators (D) Decline in reproduction of herbivores with time |
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Answer» Correct Option :- (C) Herbivore population has been kept in control by predators |
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