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Delhi University Entrance Test (DUET) 2020 Previous Year Question Paper With Answer Key

This post was last modified on 27 December 2020

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DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

Topic:- MICRO MSC S2

The virus which was used in the Hershey-Chase experiment to prove that DNA is the genetic material, belong to the genus:

[Question ID = 3392]
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1. T1 virus [Option ID = 13562]
2. T2 virus [Option ID = 13563]
3. T3 virus [Option ID = 13564]
4. T4 virus [Option ID = 13565]
Correct Answer :-
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- T4 virus [Option ID = 13565]
High partition coefficient during the liquid-liquid extraction process for product recovery implicates:

[Question ID = 3393]
1. Difficulty in the extraction process [Option ID = 13566]
2. Higher product degradation [Option ID = 13567]
3. No effect on the extraction process [Option ID = 13568]
4. Ease of extraction [Option ID = 13569]
Correct Answer :-
- Ease of extraction [Option ID = 13569]
Numerical aperture of an oil immersion objective lens is around:

[Question ID = 3394]
1. 0.65 [Option ID = 13570]
2. 0.85 [Option ID = 13571]
3. 1.33 [Option ID = 13572]
4. 1.03 [Option ID = 13573]
Correct Answer :-
- 1.33 [Option ID = 13572]

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Which one of the following statements is incorrect?

[Question ID = 3395]
1. RNA polymerase III uses internal promoters located within the transcription unit [Option ID = 13574]
2. RNA polymerase II synthesizes mRNAs [Option ID = 13575]
3. RNA polymerase I synthesizes tRNAs [Option ID = 13576]
4. RNA polymerase III synthesizes small RNAs [Option ID = 13577]
Correct Answer :-
- RNA polymerase I synthesizes tRNAs [Option ID = 13576]
An icosahedron structure of virus particle is made of:
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[Question ID = 3396]
1. 20 vertices, 12 edges, 30 faces [Option ID = 13578]
2. 20 edges, 12 faces, 30 vertices [Option ID = 13579]
3. 20 faces, 12 vertices, 30 edges [Option ID = 13580]
4. 20 vertices, 12 faces, 30 edges [Option ID = 13581]
Correct Answer :-
- 20 faces, 12 vertices, 30 edges [Option ID = 13580]
A nucleotide consists of a nitrogenous base linked to a sugar-phosphate. The nitrogenous base is either a purine or a pyrimidine. Which of the following combinations are pyrimidines?

[Question ID = 3397]
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1. Thymine and adenine [Option ID = 13582]
2. Cytosine and guanine [Option ID = 13583]
3. Guanine and adenine [Option ID = 13584]
4. Cytosine and uracil [Option ID = 13585]
Correct Answer :-
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- Cytosine and uracil [Option ID = 13585]
Which of the following enzymes is generally used in the preparation of High-Fructose Corn Syrup (HFCS)?

[Question ID = 3398]
1. Glucose oxidase [Option ID = 13586]
2. Glucose isomerase [Option ID = 13587]
3. Cellobiose dehydrogenase [Option ID = 13588]
Correct Answer :-
- Glucose isomerase [Option ID = 13587]

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Cyclization of glucose results in a:

[Question ID = 3399]
1. Furanose ring [Option ID = 13590]
2. Pyranose ring [Option ID = 13591]
3. Glycosyl ring [Option ID = 13592]
4. Glycone ring [Option ID = 13593]
Correct Answer :-
- Pyranose ring [Option ID = 13591]
During assembly of a Poliovirus particle, twelve of the 14 S complexes assemble together to form:
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[Question ID = 3400]
1. an empty 73 S capsid [Option ID = 13594]
2. an empty 125 S capsid [Option ID = 13595]
3. 73 S capsid packaged with positive ssRNA genome inside it [Option ID = 13596]
4. 125 S capsid packaged with negative ssRNA genome inside it [Option ID = 13597]
Correct Answer :-
- an empty 73 S capsid [Option ID = 13594]
Resolving power of a microscope is a function of:

[Question ID = 3401]
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1. Only wavelength of light used [Option ID = 13598]
2. Only numerical aperture of lens system [Option ID = 13599]
3. Refractive index [Option ID = 13600]
4. Wavelength of light used and numerical aperture of lens system [Option ID = 13601]
Correct Answer :-
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- Wavelength of light used and numerical aperture of lens system [Option ID = 13601]
Which of the following is not an industrial by-product?

[Question ID = 3402]
1. Sulfite waste liquor [Option ID = 13602]
2. Corn steep liquor [Option ID = 13603]
3. Molasses [Option ID = 13604]
4. Yeast hydrolysate [Option ID = 13605]
Correct Answer :-
- Yeast hydrolysate [Option ID = 13605]
A male genetic disorder caused by the presence of one or more extra X chromosomes is:

[Question ID = 3403]
1. Huntington's disease [Option ID = 13606]
2. Klinefelter syndrome [Option ID = 13607]
3. Creutzfeldt-Jakob disease [Option ID = 13608]
4. Alzheimer's disease [Option ID = 13609]
Correct Answer :-
- Klinefelter syndrome [Option ID = 13607]

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Which one of these enzymes is not packaged inside a retrovirus particle?

[Question ID = 3404]
1. RNA dependent DNA polymerase [Option ID = 13610]
2. Integrase [Option ID = 13611]
3. Protease [Option ID = 13612]
4. Glycosylase [Option ID = 13613]
Correct Answer :-
- Glycosylase [Option ID = 13613]
Who was awarded Nobel Prize for the discovery of streptomycin?
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[Question ID = 3405]
1. Selman A. Waksman [Option ID = 13614]
2. Paul Ehrlich [Option ID = 13615]
3. Elie Metchnikoff [Option ID = 13616]
4. Sergei N. Winogradsky [Option ID = 13617]
Correct Answer :-
- Selman A. Waksman [Option ID = 13614]
Which of the following organisms contribute maximally to global antibiotic production?

[Question ID = 3406]
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1. Firmicutes [Option ID = 13618]
2. Proteobacteria [Option ID = 13619]
3. Halobacteria [Option ID = 13620]
4. Actinobacteria [Option ID = 13621]
Correct Answer :-
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- Actinobacteria [Option ID = 13621]
Representatives of most major families of DNA viruses are associated with cancer, except:

[Question ID = 3407]
1. Poxviruses [Option ID = 13622]
2. Adenoviruses [Option ID = 13623]
3. Herpesviruses [Option ID = 13624]
4. Polyomaviruses [Option ID = 13625]
Correct Answer :-
- Poxviruses [Option ID = 13622]
Which of the following could be the reason for no expression of eukaryotic recombinant protein using an expression vector in E.coli?

[Question ID = 3408]
1. Addition of inducing agent [Option ID = 13626]
2. Growth of bacterial culture in presence of the antibiotic used to select for the recombinant plasmid [Option ID = 13627]
3. Codon bias [Option ID = 13628]
4. Eukaryotic proteins cannot ever be expressed in bacteria [Option ID = 13629]
Correct Answer :-
- Codon bias [Option ID = 13628]

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The region in which bacteriochlorophyll can absorb light is:

[Question ID = 3409]
1. ultraviolet region [Option ID = 13630]
2. infrared region [Option ID = 13631]
3. visible region [Option ID = 13632]
4. short wavelength of visible range [Option ID = 13633]
Correct Answer :-
- infrared region [Option ID = 13631]
Ribavirin has been used in aerosol form to treat infants hospitalized with:
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[Question ID = 3410]
1. Lassa fever [Option ID = 13634]
2. Respiratory syncytial virus infection [Option ID = 13635]
3. Bunyavirus infection [Option ID = 13636]
4. Hepatitis C virus infection [Option ID = 13637]
Correct Answer :-
- Respiratory syncytial virus infection [Option ID = 13635]
Introduction of oxygen into fermenting yeast leads to the cessation of ethanol fermentation, which is known as:

[Question ID = 3411]
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1. Harden-Young effect [Option ID = 13638]
2. Pasteur effect [Option ID = 13639]
3. Crabtree effect [Option ID = 13640]
4. Winogradsky effect [Option ID = 13641]
Correct Answer :-
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- Pasteur effect [Option ID = 13639]
Thermolabile biological material cannot be extracted from fermentation broth by use of which of the following techniques?

[Question ID = 3412]
1. Lyophilization [Option ID = 13642]
2. Sublimation [Option ID = 13643]
3. Ultrafiltration [Option ID = 13644]
4. Solvent extraction [Option ID = 13645]
Correct Answer :-
- Sublimation [Option ID = 13643]
The alpha-helix configuration found in proteins has:

[Question ID = 3413]
1. 3.4 amino acids per turn [Option ID = 13646]
2. 2 amino acids per turn [Option ID = 13647]
3. 4 amino acids per turn [Option ID = 13648]
4. 3.6 amino acids per turn [Option ID = 13649]
Correct Answer :-
- 3.6 amino acids per turn [Option ID = 13649]

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Traditionally Koumiss is made from the milk of which of the following animals?

[Question ID = 3414]
1. Mare [Option ID = 13650]
2. Cow [Option ID = 13651]
3. Buffalo [Option ID = 13652]
4. Goat [Option ID = 13653]
Correct Answer :-
- Mare [Option ID = 13650]
In which of the following cases can a vaccine be used post-exposure to the virus?
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[Question ID = 3415]
1. Hepatitis C virus [Option ID = 13654]
2. Rabies virus [Option ID = 13655]
3. Epstein Barr Virus [Option ID = 13656]
4. Poliovirus [Option ID = 13657]
Correct Answer :-
- Rabies virus [Option ID = 13655]
Which of the following combinations regulate gene expression?

[Question ID = 3416]
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1. Promoter strength and DNA polymerase activity [Option ID = 13658]
2. Origin strength and DNA helicase activity [Option ID = 13659]
3. Histone acetylation and replisome stability [Option ID = 13660]
4. DNA methylation and mRNA stability [Option ID = 13661]
Correct Answer :-
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- DNA methylation and mRNA stability [Option ID = 13661]
Which of the following microorganisms are used in yogurt preparation (1:1 ratio)?

[Question ID = 3417]
1. Lactobacillus delbrueckii and Streptococcus thermophilus [Option ID = 13662]
2. Streptococcus thermophilus and Lactobacillus lactis [Option ID = 13663]
3. Lactobacillus delbrueckii and Lactobacillus casei [Option ID = 13664]
4. Lactobacillus delbrueckii and Lactobacillus lactis [Option ID = 13665]
Correct Answer :-
- Lactobacillus delbrueckii and Streptococcus thermophilus [Option ID = 13662]
In 1952, this scientist published a paper that established the plaque assay as a means of counting viable animal viruses:

[Question ID = 3418]
1. John Enders [Option ID = 13666]
2. Frederick Robbins [Option ID = 13667]
3. Renato Dulbecco [Option ID = 13668]
4. James Watson [Option ID = 13669]
Correct Answer :-
- Renato Dulbecco [Option ID = 13668]

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Which region of the host's chromosome can get transduced?

[Question ID = 3419]
1. Only the gal or bio regions can get transduced [Option ID = 13670]
2. Any region of the host can be transduced [Option ID = 13671]
3. The transducing particle is able to propagate itself subsequently [Option ID = 13672]
4. The transducing particle carries only host DNA [Option ID = 13673]
Correct Answer :-
- Only the gal or bio regions can get transduced [Option ID = 13670]
Anoxygenic bacterial photosynthesis uses the following as a chemical reductant:
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[Question ID = 3420]
1. oxygen [Option ID = 13674]
2. water [Option ID = 13675]
3. hydrogen sulphide [Option ID = 13676]
4. ammonia [Option ID = 13677]
Correct Answer :-
- hydrogen sulphide [Option ID = 13676]
The concept of 'gene rearrangement in antibody production' was given by:

[Question ID = 3421]
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1. Cesar Milstein [Option ID = 13678]
2. Susumu Tonegawa [Option ID = 13679]
3. Gerald Edelman [Option ID = 13680]
4. Peter Doherty [Option ID = 13681]
Correct Answer :-
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- Susumu Tonegawa [Option ID = 13679]
Which of the following is an essential fatty acid?

[Question ID = 3422]
1. Oleic Acid [Option ID = 13682]
2. Lauric Acid [Option ID = 13683]
3. Alpha linolenic Acid [Option ID = 13684]
4. Palmitic Acid [Option ID = 13685]
Correct Answer :-
- Alpha - linolenic Acid [Option ID = 13684]
During food preservation, sodium nitrate is an effective agent against which of the following microorganisms under acidic conditions?

[Question ID = 3423]
1. Anaerobic microorganisms [Option ID = 13686]
2. Aerobic microorganisms [Option ID = 13687]
3. Acidophiles [Option ID = 13688]
4. Thermophiles [Option ID = 13689]
Correct Answer :-
- Anaerobic microorganisms [Option ID = 13686]

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In birds, the lymphoid organ which is the primary site of B-cell maturation is:

[Question ID = 3424]
1. Bone marrow [Option ID = 13690]
2. Bursa of fabricius [Option ID = 13691]
3. Harderian gland [Option ID = 13692]
4. Germinal center [Option ID = 13693]
Correct Answer :-
- Bursa of fabricius [Option ID = 13691]
Which of the following would you use to determine if a mutation in a DNA-binding protein results in loss of DNA-binding function?
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[Question ID = 3425]
1. Mass spectrometry [Option ID = 13694]
2. PACE [Option ID = 13695]
3. Chromatin immunoprecipitation [Option ID = 13696]
4. Electrophoretic mobility shift assay [Option ID = 13697]
Correct Answer :-
- Electrophoretic mobility shift assay [Option ID = 13697]
In general, the substances with molecular mass lower than this are poorly immunogenic

[Question ID = 3426]
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1. 80-100 kDa [Option ID = 13698]
2. 30-50 kDa [Option ID = 13699]
3. 5-10 kDa [Option ID = 13700]
4. 1 kDa [Option ID = 13701]
Correct Answer :-
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- 5-10 kDa [Option ID = 13700]
A competitive inhibitor of an enzyme:

[Question ID = 3427]
1. decreases Km without affecting Vmax [Option ID = 13702]
2. decreases Vmax without affecting Km [Option ID = 13703]
3. increases Vmax without affecting Km [Option ID = 13704]
4. increases Km without affecting Vmax [Option ID = 13705]
Correct Answer :-
- increases Km without affecting Vmax [Option ID = 13705]
The monoclonal antibodies that catalyze reactions are:

[Question ID = 3428]
1. Single chain antibodies [Option ID = 13706]
2. Single domain antibodies [Option ID = 13707]
3. Nanobodies [Option ID = 13708]
4. Abzymes [Option ID = 13709]
Correct Answer :-
- Abzymes [Option ID = 13709]

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When radiolabelling DNA to make probes for Southern blotting you would use:

[Question ID = 3429]
1. RNA polymerase I [Option ID = 13710]
2. DNA polymerase I [Option ID = 13711]
3. Mung bean nuclease [Option ID = 13712]
4. Exonuclease III [Option ID = 13713]
Correct Answer :-
- DNA polymerase I [Option ID = 13711]
Chlorobium belongs to the following group of photosynthetic bacteria:
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[Question ID = 3430]
1. Purple sulphur bacteria [Option ID = 13714]
2. Green sulphur bacteria [Option ID = 13715]
3. Purple non-sulphur bacteria [Option ID = 13716]
4. Green non-sulphur bacteria [Option ID = 13717]
Correct Answer :-
- Green sulphur bacteria [Option ID = 13715]
Class III MHC genes encode:

[Question ID = 3431]
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1. Glycoproteins expressed primarily on antigen presenting cells [Option ID = 13718]
2. Glycoproteins expressed on surface of nearly all nucleated cells [Option ID = 13719]
3. Various secreted proteins that have immune functions like component of complement system [Option ID = 13720]
4. Proteins involved in mucosal immunity [Option ID = 13721]
Correct Answer :-
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- Various secreted proteins that have immune functions like component of complement system [Option ID = 13720]
What is the source of inorganic phosphorus for plants?

[Question ID = 3432]
1. Inorganic sulfur from phytic acid [Option ID = 13722]
2. Inorganic nitrogen from phytic acid [Option ID = 13723]
3. Inorganic phosphorus from phytic acid [Option ID = 13724]
4. Inorganic arsenic from phytic acid [Option ID = 13725]
Correct Answer :-
- Inorganic phosphorus from phytic acid [Option ID = 13724]
The organisms which can use reduced inorganic compounds as electron donors are known as:

[Question ID = 3433]
1. chemotrophs [Option ID = 13726]
2. organotrophs [Option ID = 13727]
3. lithotrophs [Option ID = 13728]
4. phototrophs [Option ID = 13729]
Correct Answer :-
- lithotrophs [Option ID = 13728]

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The complement system components that make 'membrane attack complex' are:

[Question ID = 3434]
1. C4b, C4c, C4d and C5a [Option ID = 13730]
2. C5, C6, C7, C8 and C9 [Option ID = 13731]
3. C5a, C6, C7, C8 and C9 [Option ID = 13732]
4. C5b, C6, C7, C8 and C9 [Option ID = 13733]
Correct Answer :-
- C5b, C6, C7, C8 and C9 [Option ID = 13733]
Rumen anaerobic fungi exist in relationship with _________ to increase the rate of cellulose breakdown in animals.
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[Question ID = 3435]
1. Acetogens [Option ID = 13734]
2. Alkaliphiles [Option ID = 13735]
3. Acidophiles [Option ID = 13736]
4. Methanogens [Option ID = 13737]
Correct Answer :-
- Methanogens [Option ID = 13737]
Chediak-Higashi syndrome is a rare inherited disorder which is characterized by abnormal function of which type of cells of the immune system?

[Question ID = 3436]
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1. B-cells [Option ID = 13738]
2. T-cells [Option ID = 13739]
3. Natural killer cells [Option ID = 13740]
4. Cytotoxic T cells [Option ID = 13741]
Correct Answer :-
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- Natural killer cells [Option ID = 13740]
Which of the following is not essential for the survival and propagation of a eukaryotic chromosome?

[Question ID = 3437]
1. Origin [Option ID = 13742]
2. Centromere [Option ID = 13743]
3. Promoter [Option ID = 13744]
4. Telomere [Option ID = 13745]
Correct Answer :-
- Promoter [Option ID = 13744]
In respirometry, the evolution of labelled CO2 from which carbon of glucose represents operation of Entner Doudoroff pathway?

[Question ID = 3438]
1. C1 and C2 [Option ID = 13746]
2. C2 and C5 [Option ID = 13747]
3. C1 and C4 [Option ID = 13748]
4. C3 and C4 [Option ID = 13749]
This download link is referred from the post: DUET Last 10 Years 2011-2021 Question Papers With Answer Key || Delhi University Entrance Test conducted by the NTA

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This post was last modified on 27 December 2020

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