This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Assertion: Saheli, an oral contraceptive for females, contains a steroidal preparation. Reason: It is a "once a week" pill with very few side effects.A. Both A and R are true and R is the correct explanation of A B. Both A and R are true and R is not the correct explanation of A C. A is true but R is false D. A is False but R is true |
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Answer» Correct option is D. A is False but R is true |
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| 2. |
Which enzyme remains active at high temperature? (a) Cellulase (b) Pectinase (c) Taqpolymerase (d) Lysozyme |
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Answer» Taqpolymerase enzyme is remains active at high temperature. |
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| 3. |
Lactational amenorrhea is- (a) Artificial process of contraception (b) Natural process of contraception (c) A process of lactation (d) Stage of non lactation |
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Answer» Lactational amenorrhea is Natural process of contraception. |
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| 4. |
From which microbial source can pectinase be obtained? |
| Answer» Pectinase is obtained from the microbial soruce Sclerotina libertine. | |
| 5. |
Which is natural air pollutant? (a) Gases from valcanoes (b) Pollen grains (c) Dust particle (d) All of these |
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Answer» (d) All of these |
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| 6. |
Assertion: Lactational amenorrhea is the natural method of contraception. Reason: It increases the phagocytosis of spermA. Both A and R are true and R is the correct explanation of A B. Both A and R are true and R is not the correct explanation of A C. A is true but R is false D. A is False but R is true |
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Answer» Correct option is C. A is true but R is false |
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| 7. |
The rate constant of a reaction at 500 K and 700 K are 0.02 s-1 and 0.07 s-1 respectively. Calculate the value of Ea and A. |
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Answer» 18.23 KJ mol-1 , 1.603 |
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| 8. |
The activation energy of a reaction is 94.14 KJ/mol and the value of rate constant at 40º C is 1.8 x 10-1 sec-1. Calculate the frequency factor A |
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Answer» Given, Ea = 94.14 x 103 J mol-1, T = 40 + 273 =313 K, K = 1.8 x 10-1 sec-1 A = antilog (10.9635) = 9.194 x 1010 sec-1 |
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| 9. |
Molecular scissors which cut DNA at specific site is- (a) Pectinase (b) Polymerase (c) Restriction endonuclease (d) Ligase |
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Answer» Molecular scissors which cut DNA at specific site is Restriction endonuclease. |
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| 10. |
The rate constant of a reaction at 500 K and 700 K are 0.02 s-1 and 0.07 s-1 respectively. Calculate the value of Ea and A. |
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Answer» 18.23 KJ mol-1, 1.603 |
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| 11. |
‘Green Muffler’ is related to pollution of- (a) Soil (b) Air (c) Noise (d) Water |
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Answer» ‘Green Muffler’ is related to pollution of Noise. |
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| 12. |
The process of double fertilizatrion was discovered by- (a) Strasburger (b) P Maheswari (c) Nawaschin (d) Amici |
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Answer» The process of double fertilizatrion was discovered by Nawaschin. |
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| 13. |
Which of the following is chain initiation codon? (a) AUG (b) CCC (c) UAG (d) UUA |
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Answer» AUG is chain initiation codon. |
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| 14. |
State the laws of refraction. What is the meaning of “the refractive index of crown glass is 1.52”? |
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Answer» Laws of refraction: 1. The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane. 2. The ratio of the sine of the angle of incidence to the sine of angle of refraction is a constant, for the light of given colour and for the given pair of media. This law is known as snell’s law of refraction. The refractive index of crown glass is 1.52. This means that the ratio of the speed of the light in air and the speed of light in crown glass is equal to 1.52. |
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| 15. |
Short stretches of DNA used to identify complementary sequence in a sample arecalled A. probes B. markers C. VNTRs D. primers |
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Answer» Correct option is A. Probes |
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| 16. |
AUG on the mRNA will result in the activation of which of the following RNA having correct combination of amino acids:Site ASite BAUACMethionineBMethionineUACCMethionineAUGDAUGMethionine |
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Answer» Correct option is
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| 17. |
Define the power of a lens. What is the meaning of “The power of a lens is 1 diaptor” If the power a of a lens is -2.0 D, then what type of lens is that? When an object is kept at infinity from this type of lens, what is the size of the image formed? |
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Answer» The power of a lens is defined as the reciprocal of its focal length it is represented by the letter R. 1 Diaptor is the power of a lens whose focal length is 1 metre 1D = 1M-1. If the power of a law is -2.0D then the type of lens is concave. The size of the image is highly diminished point sized. |
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| 18. |
Oswald Avery, Colin MacLeod and Maclyn McCarty used enzymes to purify biochemicals such as proteins, DNA and RNA from the heat-killed S cells to see which ones could transform live R cells into S cells in Griffith's experiment. They observed that A. Proteases and RNases affected transformation. B. DNase inhibited transformation. C. Proteases and Lipases affected transformation. D. RNases inhibited transformation. |
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Answer» Correct option is B. DNase inhibited transformation |
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| 19. |
lf 20 g of calcium carbonate is added to a solution containing 20 g of HCl. What substances will be present when the reaction is over and what quantity of each of them will be present there? |
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Answer» Reaction: CaCO3 + 2HCl → CaCl2 + CO2 + H2O 100g 73g 20g 20g ∵ 100 g CaCO3 require 73 g HCl ∴ 20 g CaCO3 require 73/100 x 20 = 14.6 g HCl Thus, when the reaction is over 5.6 g of HCI present. |
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| 20. |
In E.coli, the lac operon gets switched on when A. lactose is present and it binds to the repressor. B. repressor binds to operator. C. RNA polymerase binds to the operator. D. lactose is present and it binds to RNA polymerase. |
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Answer» Correct option is A. lactose is present, and it binds to the repressor |
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| 21. |
Explain Raoult's Law. |
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Answer» Raoult's law: The vapour pressure of a volatile component in a given isolution is proportional to its mole fraction in the solution. i.e., pi ∝ xi or, pi = pi0 × x1. |
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| 22. |
Which one is the strongest acid?(a) CH2FCOOH(b) CH2ClCOOH (c) CHCl2COOH(d) CHF2COOH |
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Answer» CHF2COOH is the strongest acid |
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| 23. |
What are Faradays laws of electrolysis? Explain. |
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Answer» Faraday's laws of electrolysis: (i) First law of etectrolysis: During electrolysis amount of ions deposited or liberated at an electrode is directly proportional to the quantity of electricity passed through the electrolyte i.e. W ∝ Q or, W = zQ. where, W = amount of ions in a g deposited or liberated O = quantity of electricity in coulomb passed. (ii) Second law of electrolysis: When same quantity of electricity is passed through two or more electrolytes connected in series then amount of ions deposited or librated at the electrodes are directly proportional to their equivalent weights. (W1/E1) = (W2/E2) or, (W1/W2) = (E1/E2) |
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| 24. |
7. The reactivity of metal with water is in the order of(a) \( Na > Mg > Zn > Fe > Cu \)(b) \( Cu > Fe > Zn > Mg > Na \)(c) \( Mg > Zn > Na > Fe > Cu \)(d) \( Zn > Na > Mg > Fe > Cu \) |
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Answer» (a)Na>Mg>Zn>Fe>Cu
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| 25. |
Children of 0 to 1 year old are called_______. a) Toddler b) Infant c) Preschool Children |
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Answer» b) Infant Children of 0 to 1 year old are called Infant. |
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| 26. |
The co-ordination number of cobalt in [CO(en)2 Cl2]+ ion is-(a) 3(b) 4(c) 5(d) 6 |
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Answer» The co-ordination number of cobalt in [CO(en)2 Cl2]+ ion is 6 |
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| 27. |
_________keeps ticking as the cells of the body and the body itself changes. a) Biological clock b) Wall clock c) Table clock |
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Answer» a) Biological clock Biological clock keeps ticking as the cells of the body and the body itself changes. |
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| 28. |
There is no change in the colour of red litmus and blue litmus paper when introduced into an aqueous solution of sodium chloride. After passing direct current through the same solution, red litmus changes to blue colour. Which product is responsible for this change? Mention any two uses of this product. |
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Answer» Sodium hydroxide/NaOH: (i) Decreasing metals (ii) Soaps and detergents (iii) Paper making (iv) Artificial fibres. |
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| 29. |
______need to be conscious of actions and behaviors that cause older adults to become dependent on them and need to allow older patients to maintain as much independence as possible. a) Caregivers b) Doctors c) Nurses |
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Answer» a) Caregivers Caregivers need to be conscious of actions and behaviors that cause older adults to become dependent on them and need to allow older patients to maintain as much independence as possible. |
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| 30. |
Which of the following is p-block element ? (a) Na(b) Cu (c) B (d) Mg |
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Answer» B is p-block element. |
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| 31. |
Give reasons- Ethyne is more acidic than ethane. |
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Answer» In ethyne, carbon is sp hybridised but in ethane, carbon is sp3 hybridised. s-character increases acidic strength increases thus, ethyne is more acidic than ethane. |
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| 32. |
In face centred cubic unit cell, the edge lenght is(a) 4/√3 r(b) 4/√2 r(c) 2 r(d) √3/2 r |
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Answer» In face centred cubic unit cell, the edge lenght is 4/√2 r |
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| 33. |
Blood, phloem and muscle are (a) tissues (b) organs (c) cells (d) organ system |
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Answer» (a) Muscle tissue is separated into three distinct categories: visceral or smooth muscle, which is found in the inner linings of organs; skeletal muscle, which is found attached to bone in order for mobility to take place; and cardiac muscle which is found in the heart.Vascular tissue is a complex tissue found in vascular plants, meaning that it is composed of more than one cell type. The primary components of vascular tissue are the xylem and phloem. Connective tissue - It holds everything together. Blood is a connective tissue. |
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| 34. |
Amides may be converted into aminas by reaction named after(a) Perkin(b) Claisen(c) Hoffmann(d) Kolbe |
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Answer» Amides may be converted into aminas by reaction named after Hoffmann. |
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| 35. |
Cardiac muscle cells are cylindrical branched (a) uninucleate and voluntary (b) uninucleate and involuntary (c) multinucleate and voluntary (d) multinucleate and involuntary |
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Answer» (b) uninucleate and involuntary |
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| 36. |
Which on of the following is paramagnetic ion- (a) SC3+(b) T4+2(c) Cu2+(d) Z2+n |
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Answer» Cu2+ is paramagnetic ion. |
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| 37. |
The rate of reaction is exproceced by rate = K [A]x [B]y The order of reaction is- (a) x - y(b) x + y(c) x(d) y |
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Answer» The rate of reactionis exproceced by rate = K [A]x [B]y The order of reaction is x + y |
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| 38. |
Children of 12 to 18 years are called as ______. a) School aged children b) Adolescent c) Toddlers |
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Answer» b) Adolescent Children of 12 to 18 years are called as Adolescent. |
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| 39. |
Human tissues, organs or fluids, body parts and contaminated animal carcasses are called as ______. a) Chemical waste b) Pathological waste c) Pharmaceutical waste |
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Answer» b) Pathological waste Human tissues, organs or fluids, body parts and contaminated animal carcasses are called as Pathological waste. |
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| 40. |
Disposal of ________ wastes is done by autoclaving hydroclaving, microwave or incineration. a) Microbiological and bio-technological b) Chemical c) Anatomical |
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Answer» a) Microbiological and bio-technological Disposal of Microbiological and bio-technological wastes is done by autoclaving hydroclaving, microwave or incineration. |
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| 41. |
Solvents and reagents used for laboratory preparations, disinfectants, and heavy metals contained in medical devices (e.g. mercury in broken thermometers) and batteries are called as_______. a) Pathological waste b) Chemical waste c) Pharmaceutical waste |
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Answer» b) Chemical waste Solvents and reagents used for laboratory preparations, disinfectants, and heavy metals contained in medical devices (e.g. mercury in broken thermometers) and batteries are called as Chemical waste. |
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| 42. |
Which set clearly identify striated muscles ? (a) Cylindrical, syncytial and unbranched (b) Spindle, unbranched and uninucleated (c) Cylindrical, striped and nucleated (d) Cylindrical, striped and branched |
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Answer» (a) Cylindrical, syncytial and unbranched |
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| 43. |
Average life span of human R.B.C. is(a) 100 days (b) 90 days(c) 120 days (d) 80 days |
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Answer» (c) 120 days |
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| 44. |
In animals sex determination is due to (a) X-chromosome (b) Y-chromosome (c) A-chromosome (d) B-chromosome |
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Answer» (b) Y-chromosome |
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| 45. |
A pure tall plant can be differentiated from a hybrid tall plant (a) by measuring length of plant (b) by spraying gibberellins (c) if all plants are tall after self-pollination (d) if all plants are dwarf after self-pollination |
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Answer» (c) if all plants are tall after self-pollination |
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| 46. |
The word ‘prokaryote’ means a cell (a) with many nuclei (b) with one nucleus (c) with diffused nucleus (d) without chloroplast |
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Answer» (c) with diffused nucleus |
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| 47. |
The term evolution in biology means that (a) fossils are old (b) life began in sea (c) living things constantly change (d) life began on land |
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Answer» (c) living things constantly change |
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| 48. |
A 0.10 M solution of a mono protic acid (`d=1.01g//cm^(3)`) is 5% dissociated what is the freezing point of the solution the molar mass of the acid is 300 and `K_(f)(H_(2)O)=1.86C//m`A. `-0.189^(@)C`B. `-0.194^(@)C`C. `-0.199^(@)C`D. none |
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Answer» Correct Answer - C Mass of 1 litre of solution =1010 gram mass of solvent =1010 `-300xx0.1=980` gram `m=(0.1)/(0.98)=0.102` `DeltaT_(f)=iK_(f)m=(1+alpha)K_(f)m` `impliesDeltaT_(f)=0.199^(@)C` `impliesT_(f)=0-0.199^(@)C=-0.199^(@)C` |
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| 49. |
The Origin of Species' was written by (a) Linnaeus (b) Whittaker (c) Parasara (d) Darwin |
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Answer» (d) Charles Darwin's Origin of Species is a seminal work in scientific literature and arguably the pivotal work in evolutionary biology. It introduced the theory that populations evolve over the course of generations through a process of natural selection. |
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| 50. |
In the list of organisms given below, those that are reproduced by the asexual method are (i) banana (ii) dog (iii) Yeast (iv) Amoeba (a) (ii) and (iv) (b) (i), (iii) and (iv) (c) (i) and (iv) (d) (ii), (iii) and (iv) |
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Answer» (b) (i), (iii) and (iv) |
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