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401
GATE2017-23
The transcription factor $X$ binds a $10$ base pair DNA stretch. In the DNA of an organism, $X$ was found to bind at $20$ distinct sites. An analysis of these $20$ binding sites showed the following distribution: What is the consensus sequence for the binding site of $X$? $\textrm{NGTCNNNTNN}$ $\textrm{AGTCACNTGC}$ $\textrm{CACCTANCTG}$ $\textrm{ANNNACGNGC}$
The transcription factor $X$ binds a $10$ base pair DNA stretch. In the DNA of an organism, $X$ was found to bind at $20$ distinct sites. An analysis of these $20$ bindin...
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402
GATE2017-24
A bacterium has a genome of size $6$ million base pairs. If the average rate of DNA synthesis is $1000$ base pairs/second, the time taken (in minutes) for replication of the genome will be ________.
A bacterium has a genome of size $6$ million base pairs. If the average rate of DNA synthesis is $1000$ base pairs/second, the time taken (in minutes) for replication of ...
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403
GATE2017-25
At the transcription start site of a gene, any of the four nucleotides can occur with equal probability $p$. The Shannon Entropy $S$, given by $S= – \Sigma_{i=1}^4 p_i \ln p_i$, for this start site is _________
At the transcription start site of a gene, any of the four nucleotides can occur with equal probability $p$. The Shannon Entropy $S$, given by $S= – \Sigma_{i=1}^4 p_i ...
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404
GATE2017-26
Which one of the following graphs represents the kinetics of protein precipitation by addition of ammonium sulphate? On the $Y$-axis, [Protein] represents the concentration of free protein in solution
Which one of the following graphs represents the kinetics of protein precipitation by addition of ammonium sulphate? On the $Y$-axis, [Protein] represents the concentrati...
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405
GATE2017-27
The distribution of marks scored by a large class in an exam can be represented as a normal distribution with mean $\mu$ and standard deviation $\sigma$. In a follow-up exam in the same class, everyone scored $5$ marks more than their respective score in the ... $\mu<\mu_2; \sigma>\sigma_2$ $\mu>\mu_2; \sigma<\sigma_2$ $\mu<\mu_2; \sigma=\sigma_2$
The distribution of marks scored by a large class in an exam can be represented as a normal distribution with mean $\mu$ and standard deviation $\sigma$. In a follow-up e...
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406
GATE2017-29
Match the proteins in $\textbf{Group I}$ with cellular processes in $\textbf{Group II}$ ... $\text{P-,2 Q-3, R-1, S-4}$ $\text{P-4, Q-3, R-1, S-2}$ $\text{P-2, Q-3, R-4, S-1}$
Match the proteins in $\textbf{Group I}$ with cellular processes in $\textbf{Group II}$$\begin{array}{|l|l|l|l|} \hline & \textbf{Group I} & & \text{Group II} \\ \hline P...
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407
GATE2017-30
The circular dichroism spectra of three proteins $P$, $Q$, and $R$ are given below: Choose the correct combination. $P: \alpha- \text{helix}, Q: \beta- \text{sheet}, \text{ and } R: \text{Random coil}$ ... $P: \beta- \text{Random coil}, Q: \alpha- \text{helix}, \text{ and }R: \text{sheet}$
The circular dichroism spectra of three proteins $P$, $Q$, and $R$ are given below:Choose the correct combination.$P: \alpha- \text{helix}, Q: \beta- \text{sheet}, \text{...
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408
GATE2017-31
Match the organisms in $\text{Column I}$ with the characteristics in $\text{Column II}$ ... $\text{P-2, Q-1, R-4, S-3}$ $\text{P-4, Q-1, R-2, S-3}$
Match the organisms in $\text{Column I}$ with the characteristics in $\text{Column II}$:$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} && \textbf{Column II} \\ \hli...
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GATE2017-32
Which one of the following amino acids has three ionizable groups? Glycine Leucine Valine Lysine
Which one of the following amino acids has three ionizable groups?GlycineLeucineValineLysine
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GATE2017-33
Consider an infinite number of cylinders. The first cylinder has a radius of $1$ meter and height of $1$ meter. The second one has a radius of $0.5$ meter and height of $0.5$ meter. Every subsequent cylinder has half the radius and half the radius and ... cylinder. The sum of the volumes (in cubic meters) of these infinite numbers of cylinder is __________. Given data: $\pi = 3.14$
Consider an infinite number of cylinders. The first cylinder has a radius of $1$ meter and height of $1$ meter. The second one has a radius of $0.5$ meter and height of $...
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GATE2017-34
The concentration (in micromolar) of NADH in a solution with $A_{340}=0.50$ is _________ Given data: Path length $=1$ cm; Molar extinction coefficient of NADH $\varepsilon_{340}= 6220 M^{-1}cm^{-1}$
The concentration (in micromolar) of NADH in a solution with $A_{340}=0.50$ is _________Given data: Path length $=1$ cm; Molar extinction coefficient of NADH $\varepsilon...
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GATE2017-35
The specific activity of an enzyme in a crude extract of $\textit{E.coli}$ is $9.5$ units/mg of protein. The specific activity increased to $68$ units/mg of protein upon ion-exchange chromatography. The fold purification is ________
The specific activity of an enzyme in a crude extract of $\textit{E.coli}$ is $9.5$ units/mg of protein. The specific activity increased to $68$ units/mg of protein upon ...
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GATE2017-36
Which one of the following organisms is responsible for crown gall disease in plants? $\textit{Xanthomonas campestris}$ $\textit{Rhizobium etli}$ $\textit{Agrobacterium tume faciens}$ $\textit{Erwinia stewartii}$
Which one of the following organisms is responsible for crown gall disease in plants?$\textit{Xanthomonas campestris}$$\textit{Rhizobium etli}$$\textit{Agrobacterium tume...
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GATE2017-38
Match the plant hormones in $\textbf{Column I}$ with functions in $\textbf{Column II}$ ... $\text{P-3, Q-1, R-2, S-4}$ $\text{P-2, Q-1, R-4, S-3}$
Match the plant hormones in $\textbf{Column I}$ with functions in $\textbf{Column II}$$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} && \text{Column II} \\ \hline ...
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GATE2017-39
For an $\textit{E.coli}$ culture in the exponential phase of growth, optical density (OD) at $540$ nm is $0.3$ at $2$ hours and $0.6$ at $4$ hours. Assuming that the measured OD is linearly proportional to the number of $\textit{E.coli}$ cells, the growth rate (per hour) for this culture is _________.
For an $\textit{E.coli}$ culture in the exponential phase of growth, optical density (OD) at $540$ nm is $0.3$ at $2$ hours and $0.6$ at $4$ hours. Assuming that the meas...
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GATE2017-40
An immunocompetent person becomes infected with a pathogenic strain of bacteria. Which one of the following graphs correctly depicts bacterial load in this person over time?
An immunocompetent person becomes infected with a pathogenic strain of bacteria. Which one of the following graphs correctly depicts bacterial load in this person over ti...
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GATE2017-41
The genome is diploid at the end of which phases of a human mitotic cell cycle? $\text{G2 & S}$ $\text{G1 & M}$ $\text{M & S}$ $\text{G1 & G2}$
The genome is diploid at the end of which phases of a human mitotic cell cycle?$\text{G2 & S}$$\text{G1 & M}$$\text{M & S}$$\text{G1 & G2}$
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GATE2017-42
A recombinant protein is to be expressed under the control of the lac promoter and operator in a strain $\textit{E.coli}$ having the genotype lacI$^+$ crp$^+$ . Even in the absence of inducer IPTG, low levels of expression of the recombinant ... lactose to the medium Removal of all glucose from the medium Addition of excess glucose to the medium Addition of allo-lactose to the medium
A recombinant protein is to be expressed under the control of the lac promoter and operator in a strain $\textit{E.coli}$ having the genotype lacI$^+$ crp$^+$ . Even in t...
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GATE2017-43
Shown below id a plasmid vector (P) and an insert (Q). The insert was cloned into the BamHI site of the vector. The recombinant plasmid was isolated and digested with BamHi or XhoI. The results from the digestion experiments are shown in (R) Which one of ... the vector. The insert ligated to the Vector as two tandem copies The insert ligated to the vector as two copies but not in tandem
Shown below id a plasmid vector (P) and an insert (Q). The insert was cloned into the BamHI site of the vector. The recombinant plasmid was isolated and digested with Bam...
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GATE2017-44
Which one of the following CANNOT be a recognition sequence for a Type II restriction enzyme? GAATTC AGCT GCGGCCGC ATGCCT
Which one of the following CANNOT be a recognition sequence for a Type II restriction enzyme?GAATTCAGCTGCGGCCGCATGCCT
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GATE2017-45
A pedigree of an inheritable disease is shown below. This inheritable disease is $X$-linked dominant $X$-linked recessive or Y-linked only $Y$-linked only $X$-linked recessive
A pedigree of an inheritable disease is shown below.This inheritable disease is$X$-linked dominant$X$-linked recessive or Y-linkedonly $Y$-linkedonly $X$-linked recessive...
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GATE2017-46
If the chemical composition of proteins in an organism is $CH_{1.5}O_{0.3}N_{0.3}S_{0.004}$, the mass percentage of carbon in the protein is __________ Given data: Atomic weights $(Da)$ of $C=12, H=1, O=16, N=14$, and $S=32$.
If the chemical composition of proteins in an organism is $CH_{1.5}O_{0.3}N_{0.3}S_{0.004}$, the mass percentage of carbon in the protein is __________Given data: Atomic ...
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GATE2017-48
Growth of a microbe in a test tube is modeled as $\dfrac{dX}{dt} = rX \bigg (1 – \dfrac{X}{K}\bigg )$, where, $X$ is the biomass, $r$ is the growth rate, and $K$ is the carrying capacity of the environment $(r \neq O; K \neq 0)$. If the value of starting biomass is $\dfrac{K}{100}$, which one of the following graphs qualitatively represents the growth dynamics?
Growth of a microbe in a test tube is modeled as $\dfrac{dX}{dt} = rX \bigg (1 – \dfrac{X}{K}\bigg )$, where, $X$ is the biomass, $r$ is the growth rate, and $K$ is the...
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GATE2017-49
A zero-order liquid phase reaction $A \xrightarrow{k} B$ is being carried out in a batch reactor with $k=10^{-3}$ mol/min. If the starting concentration of $A$ is $0.1$ moles/liter, the time (in minutes) taken by the system before $A$ is exhausted in a $100$ liter reactor is _________
A zero-order liquid phase reaction $A \xrightarrow{k} B$ is being carried out in a batch reactor with $k=10^{-3}$ mol/min. If the starting concentration of $A$ is $0.1$ m...
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GATE2017-50
The interaction energy $E$ between two spherical particles is plotted as a function of the distance $(r)$ between them. When $r<a$, where $a$ ... attract via van der Waals attraction. Which one of the following plots correctly represents the interaction energy between the above two particles>
The interaction energy $E$ between two spherical particles is plotted as a function of the distance $(r)$ between them. When $r<a$, where $a$ is a constant, the net force...
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GATE2017-51
EcoRI restriction sites on a $10$ kb DNA fragment are shown below. Upon partial digestion, what are the lengths (in kb) of all the possible DNA fragments obtained? $2,3,4,5,6,7,8$, and $10$ $2,3,4,5,6,$ and $7$ $2,3,4,$ and $7$ $2$ and $3$
EcoRI restriction sites on a $10$ kb DNA fragment are shown below.Upon partial digestion, what are the lengths (in kb) of all the possible DNA fragments obtained?$2,3,4,5...
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GATE2017-52
A DNA strand of length $25$ nm wraps diametrically around the circumference of a spherical histone-octamer once. The radius (nm) of the histone-octamer is _______ Given data: $\pi = 3.14$
A DNA strand of length $25$ nm wraps diametrically around the circumference of a spherical histone-octamer once. The radius (nm) of the histone-octamer is _______Given da...
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GATE2017-53
One hunderd E.coli cells are each infected by a single $\lambda$ phage particle. The ratio of the number of phage particles committing to lysogeny to those committing to lysis is $4:1$. Assuming that the average burst size is $80$, the number of free phage particles released after one round of infection is _________
One hunderd E.coli cells are each infected by a single $\lambda$ phage particle. The ratio of the number of phage particles committing to lysogeny to those committing to ...
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GATE2017-54
During anaerobic growth, an organism converts glucose $(P)$ into biomass $(Q)$, ethanol $(R)$, acetaldehyde $(S)$, and glycerol $(T)$ ... , the ethanol produced (in grams) is ________ Given data: Atomic weights (Da) of $C=12, H=1, O=16$, and $N=14$
During anaerobic growth, an organism converts glucose $(P)$ into biomass $(Q)$, ethanol $(R)$, acetaldehyde $(S)$, and glycerol $(T)$. Every mole of carbon present in glu...
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GATE2017-55
Which of the following conditions promote the development of human autoimmune disorders? Inability to eliminate self-reactive lymphocytes Generation of auto-antibodies Ability to eliminate self-reactive T-cells Induction of regulatory T-cells in the thymus P,R Q,S P,Q R,S
Which of the following conditions promote the development of human autoimmune disorders?Inability to eliminate self-reactive lymphocytesGeneration of auto-antibodiesAbili...
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GATE2015-11
Which one of the following complement proteins is the initiator of the membrane attack complex $C3a$ $C3b$ $C5a$ $C5b$
Which one of the following complement proteins is the initiator of the membrane attack complex$C3a$$C3b$$C5a$$C5b$
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432
GATE2015-12
Levinthal’s paradox is related to protein secretion protein degradation protein folding protein trafficking
Levinthal’s paradox is related toprotein secretionprotein degradationprotein foldingprotein trafficking
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GATE2015-13
Which one of the following is a second generation genetically engineered crop? Bt brinjal Roundup soyabean Golden rice Bt rice
Which one of the following is a second generation genetically engineered crop?Bt brinjalRoundup soyabeanGolden riceBt rice
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GATE2015-14
Based on the heavy chain, which one of the following antibodies has multiple subtypes? IgM IgD IgE IgG
Based on the heavy chain, which one of the following antibodies has multiple subtypes?IgMIgDIgEIgG
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GATE2015-15
The Cytokinetic organelle in plant cells is centriole Phragmoplast proplastid chromoplastid
The Cytokinetic organelle in plant cells iscentriolePhragmoplastproplastidchromoplastid
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GATE2015-16
Anergy refers to nitochondrial dysfunction allergy to environmental antigens unresponsiveness to antigens a state of no energy
Anergy refers tonitochondrial dysfunctionallergy to environmental antigens unresponsiveness to antigensa state of no energy
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GATE2015-17
ABO blood group antigens in humans are differentiated from each other on the basis of sialic acid lipids spectrin glycoproteins
ABO blood group antigens in humans are differentiated from each other on the basis ofsialic acidlipidsspectringlycoproteins
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GATE2015-18
Which one of the following organisms is used for the determination of phenol coefficient of a disinfectant? Salmonella typhi Escherichia coli Candida albicans Bacillus psychrophilus
Which one of the following organisms is used for the determination of phenol coefficient of a disinfectant?Salmonella typhiEscherichia coliCandida albicansBacillus psychr...
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GATE2015-19
A single subunit enzyme converts $420$ $\mu$moles of substrate to product in one minute. The activity of the enzyme is ________ $\times 10^{-6}$ Kalal.
A single subunit enzyme converts $420$ $\mu$moles of substrate to product in one minute. The activity of the enzyme is ________ $\times 10^{-6}$ Kalal.
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GATE2015-20
Which one of the following amino acids has the highest probability to be found on the surface of a typical globular protein in aqueous environment? Ala Val Arg Ile
Which one of the following amino acids has the highest probability to be found on the surface of a typical globular protein in aqueous environment?AlaValArgIle
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