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Recent questions tagged gate2017

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1
An enzyme catalyzes a reaction by (A) decreasing the energy of the substrate. (B) decreasing the activation energy of the reaction. (C) decreasing product stability. (D) increasing the activation barrier of the reaction.
asked Mar 26, 2018 in Others Milicevic3306 7.9k points
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2
.\'atural proteins are composed primarily of 20 u-ainino acids Which one of the following statements is true for any of these amino acids in a solution opr 1.51” (A) Only the amino group is ionized. (Bl Only the carboxylic acid group is ionized. (C) Both amino and carboxylic acid groups are ionized. (D) Both amino and carboxylic acid groups are neutral.
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3
Which one of the following organisms is an indicator of fecal contamination? (A) Escherichia coli (B) Streptococcus- factis (C) Bacillus subn’lis (D) Lacrobac‘i/hts aridophi/us
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4
The \tut‘ace area «in 111‘s ut‘tlle ht gext \plld'c that can fit into at 110110“ cube “‘1”! edge\ at length 1 meter ts Lm'en data .1 ‘ 3 H
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5
In a tlnn layer cluomatogx'aphy expenmem mung a ~leca gel plate. a compound mowed nngmnon of 12.5 cm and the when! from showed nu m‘anon of lb cm The R! Value for the compound 1s
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6
sin(.r) lim is .1-°O I
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7
\Wnch one of the following mechanisms is used by human pathogens to evade host immune responses“? 1A» Somatic lt}pet'mntation (B) Antibody piodnction t0 Antigenic variation (Di Complement CICllVallOll
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8
If the nucleotide composition (00» ofa \‘ii'al genome is A = 10. U = 20. C = 40. and G = 30. which one of the I‘ollou'nig is {111% genoine" (A) Double stranded R.\'A (B) Single snanded R.\'A (C) Single xtmnded D.\'A (DD Double «landed D.\'A
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9
Which one of the followmg techniques can be med to deternuiie the stuictttre of a 15 kDa globular protein at atomic ie~olutioir7 1A) Raimn spéCtl'OxCOpy ‘8: IR specnoscopy (C) UV spectroscom ‘1)! .\'.\IR ~1>¢CIIO\COP_\'
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10
Assertion [a]: Gram negative bacteria show staining with saffranin. Reason [r]: Gram negative bacteria have an outer membrane with lipopolysaccharides. (A) Both [a] and [r] are true and [r] is the correct reason for [a]. (B) Both [a] and [r] are true but [r] is not the correct reason for [a]. (C) Both [a] and [r] are false. (D) [a] is true but [1‘] is false.
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11
The plant hormone indole-S-acetic acid is derived from histidine tyrosine njvptoplran proline
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12
Enzyme-linked iumlunosorbent assay (ELISA) is used for (A) quantifying antibody levels in blood (B) determining the molecular weight of an antigen (C') purifying proteins from biological fluids (D) determining the molecular weight of an antibody
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13
Macrophages eliminate pathogenic bacteria upon activation by (A) NK cells (Bl basopliils (Ct CD4~ T cells (D) plasma cells
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14
Ifa pi ulcin contaiih fom' cy~tcinc ibiilucx. the Iniinbci uI‘ \hffClCl" “up they can ~iniullmicou~ly form two mun-molecular disulphide bonds is
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15
Secretory proteins synthesized by ER-associated ribosomes traverse through (A) mitochondria (B) peroxisomes (C‘) the Golgi apparatus (D) the nucleus
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16
dzv dv . . a '2 = 0.—' = O atx= H. and y: l atx=l. thevalueotyatx =21s For y = fix). if (11' .t'
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17
Dining pi'otcin \_\'lllll€\i\. tRNAs are NOT involved in (A) cliai‘gnig (B) initiation ((‘t elongation tDt termination
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18
In eukaiyotes. cytokinesis is inhibited by cytochalasin D vinblastine nocodazole colchicine
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19
A pi'oto-oncogene is suspected to have uiidei gone duplication in a certain twe ofcancei. Of the following techniques. which one would verify the gene duplication.” (A) Northem blotting (Bl Southem blotting (C't South western blotting (Di Western blottingY
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20
A poly111e1a>e chain reaction (PC‘R) was set up with the folloxt111g1'eageuts: DNA template. Tuq polymerase. buffer. (DTP). and Mg". \Vhieh one of the following 15 1115511152 111 the 1‘eaetio11 111ixtu1'e'? (A) Helicase 1R1 S111gle-~t1anded 111111111132 p1ote1n~ (C) P1‘1111e1's 1D) Reverse transcriptase
asked Mar 26, 2018 in Others Milicevic3306 7.9k points
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21
An enzymatic reaction exhibit» \hchaehs-Menten klllellC\ For thi~ reaction. on doubling the concentration ot‘enzyine \rhilc niauitannng [S] ' - [ED]. (At both Kmand Yum will remain the ~aine (Bi Km will remain the same but \‘nm ml] increase. (Ci Km will increase but Yam “’1“ remain the same. (Di both Km and \‘mn will increase.
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22
A 5 lxter chemmtat is fed fresh Illednun at 0 2 lxtexx minute mung a subsnate couccutmhon of 25 mums hm Al \lcml)’ \lalc. lhc nutgmng \llc‘dlll hm mletc wnccunauuu of 2 .‘ gmnh litcx Th: 5 [MC nt‘cnnsunumun (gmmx htcl nnnmm of the xuletc m lhc Icactm 1x
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23
The transcription factm X binds a 10 base pan DNA stretch. In the DNA ot‘an organlsnl. X was found to bind at 20 distinct sites. An analysis ofthese 20 binding sites showed the follouing distribution: Position in the binding site “11m is the consensus sequence to: the binding site of X“ (..-\) ‘ 33-1 NEILIJ‘J (Bi 75:": JESS.- - ((i "P ’ '"F-II’T'Z' (D) 1.??? I? " 7-?1’: 1'
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24
A bacterium has a genome of size 6 million base pm < If the average rate of DNA syntheiis is 1000 base })ilil\ ~ecoml. the time taken 1111 minutes. t‘ox ieplicatiou ot‘tlie genome “'1“ be
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25
.»\t the transcnpnon start me of a acne. any of the four nnclcotxdcs. can occm mth cqnal probabxlm' p. 'I‘he Shannon Entropy 5. given by .- r - 121 p,- ln p,. for flu» start sne 1s
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26
\Wtieh one ofthe following gtaphx teplexentx the kinetiex of pi oteiu pt‘ee ipitation by mhhtion of anunonium \ulphate'.‘ 0n the Y-axxx. [Protein] tepi‘exenh the eoncentmtion of free protein in solution. tAi (Bi (Ci (Di ? E ? F 2 2 ’3 i 9 E ‘5 ‘c': E. E. c: a Time Time Time Time
asked Mar 26, 2018 in Others Milicevic3306 7.9k points
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27
'I he dtstnbntton of marks scored by a large class 111 an exam can be represented as a nonnal dlSIl lbllthll with mean u and >tanda1 d dex'xanon 0 In a I ollm -np exam m the same class. everyone scored 5 marks more than then tespeem'e were 111 the eathet exam for tlus follow-up exam the (hstnlmtton ... Which one of the following 1 coneet'. (AMI-113:0 0; (BHI 3.0 0~ \("tu tt3.0 0; (Dvn 5.0-0;
asked Mar 26, 2018 in Others Milicevic3306 7.9k points
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28
The angle (m deglcexb lwemccn the scum x — i —j + 2k and v- - 2i —j — 1.51" b
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29
Match the proteins in Group I with cellular processes in Group II Groupl P. p53 Q. Lysozyme R. Tubulins S Histories l. . Apoptosis 3. Hydrolysis of polysaccharides 4. I) Group 11 DNA packaging Chromosome segregation (B) P-Z. Q-3 .-.Rl S-4 (D)P---2.Q3.R4.S-l
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30
The circular dichroism spectra of three proteins P. Q. and R are given below: A ) ) _ _ E R C ' c Q E ,2, p ,2, c s E 5.0. 2 2 g C E x " O _, C _ } 3 ~ .g , >1 '2: 23: g E I N\/ t 20 i 20 3 5 2 L____' ° E 1 ,- g 200 210 220 230 2.30 250 ... coil (B) P: [3-511ch. Q. u-hclix. and R. Random coil (0 P: u-liclm. Q. Random coil. and R. B-slicct (D) P: Random coil. (2: u-lielix. and R; B-shect
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31
Match the organisms in Column I with the characteristics in Column 11 Column I Column 11 P. Aim/zanococcus l . Halophile Q. Dunalieila 2. Acidophile R. .S'uZ/blobm 3. Mesophile S. Escherichia 4. Barophile (A) P-4. Q-3. R-Z. 5-1 (B) P-3. Q-Z. R-4. S-l (C) P-Z. Q-l. R-4. S-3 (D) P-4. Q-l. R-Z. 8-3
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32
Which one ofthe following amino acids has three ionizable gi'onps'? Glycine Leucine \‘aline Lysine
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33
Consider an infinite number ot‘eyhntlet‘s The t'n~t eylntdet hm a tathm of 1 meter and hetght of l ntetet. The seeund one hm a liltlllh of” 5 tnetet and hetght of“ 5 Inetet. Ex e1} ~nh\eqnent eyhntlet has half the radnts and half the hemht of the precednlz cylmder. The sum of the volumes un cnbxc meters) of these tnt‘nu‘te number of C}'lllld¢1\ 1x (men data: .I — 3 14
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34
The concentration tin nncroniolari of.\'.—\DH in a «olntion with .—\::o = 0.50 is Given data; Patli length I 1 cm; .\Iolni extinction coeflieient oI‘NADH £540 : 6220 .\I 1an ‘.
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35
The weenie activity ofau enzyme in a crude eximct of E mfi ix 05 min mg ofpimein. The specific 0CI1\'if}' increased to 68 units 1112 of protein upon ion-exclmnge clu‘oumogmphy. The fold punitici'ition i~
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36
Which one of the following organisms is responsible for crown gall disease in plants? (A) .Yamhomonas cmnpesn'is (B) Rhizobium (’Ili (C‘) Agrobacrerium mmefaciem (D) Enrinia srmwn'rii
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37
The value 0ft 1‘01 \Vlucll lhc follmvmg system of [mean cquanous 11m an mfimtc number of \Ollllimh is q 1 _ X (‘ [1 "Hyl =[4]
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38
Match the plant hormones in Colunm I with functions in Column 11 Column I Column 11 P. Gibberellic acid 1. Seed and bud dormancy Q. Zeatin 2. Fruit ripening R. Ethylene 3. Delaying leaf senescence S. Abscisic acid 4. Regulation ofplant height (A) P-4. Q-3. R-Z. 8-1 (B) P-4. Q-Z. R-3. S-l (C) P-3. Q-l. R-Z. 8-4 (D) P-Z. Q-l. R4. 8-3
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39
For an E. (0/1' culture in the exponential phase of gromh. optical density (OD) at 540 run is 0.3 at 2 hours and 0.6 at 4 hours. Assuming that the measured ()1) is linearly proportional to the number of 15. (011' cells. the gromh rate (per hour) for this culture is
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40
An nmnunocompetem person “CCOIIKN mfected mth a pathogemc stram ofbactena. Which one of the following gmphs COIICCII} dcpich back-Hal load in this pct son me: time” ( A) l B b (C ) ( D t 0 .2 a U 2 g z 2 1’ 1s ‘3 '9 0 5 0 O .o u a a E 5 E E a E a a Z 3 z 2 Time 2 Time Tum. 11m.
asked Mar 26, 2018 in Others Milicevic3306 7.9k points
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