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441
GATE2017-1
An enzyme catalyzes a reaction by decreasing the energy of the substrate. decreasing the activation energy of the reaction. decreasing product stability. increasing the activation barrier of the reaction.
An enzyme catalyzes a reaction bydecreasing the energy of the substrate.decreasing the activation energy of the reaction.decreasing product stability.increasing the activ...
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443
GATE2017-3
Which one of the following organisms is an indicator of fecal contamination? $\textit{Escherichia coli}$ $\textit{Streptococcus lactis}$ $\textit{Bacillus subtilis}$ $\textit{Lactobacillus acidophilus}$
Which one of the following organisms is an indicator of fecal contamination?$\textit{Escherichia coli}$$\textit{Streptococcus lactis}$$\textit{Bacillus subtilis}$$\textit...
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444
GATE2017-4
The surface area (in $m^2$) of the largest sphere that can fit into a hollow cube with edges of length $1$ meter is ______ Given data: $\pi=3.14$
The surface area (in $m^2$) of the largest sphere that can fit into a hollow cube with edges of length $1$ meter is ______Given data: $\pi=3.14$
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445
GATE2017-5
In a thin layer chromatography experiment using a silica gel plate, a compound showed migration of $12.5$ cm and the solvent front showed migration of $18$ cm. The $R_f$ value for the compound is ______
In a thin layer chromatography experiment using a silica gel plate, a compound showed migration of $12.5$ cm and the solvent front showed migration of $18$ cm. The $R_f$ ...
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446
GATE2017-6
$\underset{x \to 0}{\lim} \dfrac{\sin(x)}{x}$ is ________
$\underset{x \to 0}{\lim} \dfrac{\sin(x)}{x}$ is ________
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447
GATE2017-7
Which one of the following mechanisms is used by human pathogens to evade host immune responses? Somatic hypermutation Antibody production Antigenic variation Complement activation
Which one of the following mechanisms is used by human pathogens to evade host immune responses?Somatic hypermutationAntibody productionAntigenic variationComplement acti...
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448
GATE2017-8
If the nucleotide composition $(\%)$ of a viral genome is $A = 10$, $U = 20$, $C = 40$, and $G = 30$, which one of the following is this genome? Double stranded RNA Single stranded RNA Single stranded DNA Double stranded DNA
If the nucleotide composition $(\%)$ of a viral genome is $A = 10$, $U = 20$, $C = 40$, and $G = 30$, which one of the following is this genome?Double stranded RNASingle ...
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449
GATE2017-9
Which one of the following techniques can be used to determine the structure of a $15$ kDa globular protein at atomic resolution? Raman spectroscopy IR spectroscopy UV spectroscopy NMR spectroscopy
Which one of the following techniques can be used to determine the structure of a $15$ kDa globular protein at atomic resolution?Raman spectroscopyIR spectroscopyUV spect...
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451
GATE2017-11
The plant hormone indole-$3$-acetic acid is derived from histidine tyrosine tryptophan proline
The plant hormone indole-$3$-acetic acid is derived fromhistidinetyrosinetryptophanproline
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452
GATE2017-12
Enzyme-linked immunosorbent assay (ELISA) is used for quantifying antibody levels in blood determining the molecular weight of an antigen purifying proteins from biological fluids determining the molecular weight of an antibody
Enzyme-linked immunosorbent assay (ELISA) is used forquantifying antibody levels in blooddetermining the molecular weight of an antigenpurifying proteins from biological ...
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453
GATE2017-13
Macrophages eliminate pathogenic bacteria upon activation by NK cells basophils CD$4+$ T cells plasma cells
Macrophages eliminate pathogenic bacteria upon activation byNK cellsbasophilsCD$4+$ T cellsplasma cells
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454
GATE2017-14
If a protein contains four cysteine residues, the number of different ways they can simultaneously form two intra-molecular disulphide bonds is __________.
If a protein contains four cysteine residues, the number of different ways they can simultaneously form two intra-molecular disulphide bonds is __________.
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455
GATE2017-15
Secretory proteins synthesized by ER-associated ribosomes traverse through mitochondria peroxisomes the Golgi apparatus the nucleus
Secretory proteins synthesized by ER-associated ribosomes traverse throughmitochondriaperoxisomesthe Golgi apparatusthe nucleus
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456
GATE2017-16
For $y=f(x)$, if $\dfrac{d^2y}{dx^2}=0$, $\dfrac{dy}{dx}=0$ at $x=0$, and $y=1$ at $x=1$, the value of $y$ at $x=2$ is __________
For $y=f(x)$, if $\dfrac{d^2y}{dx^2}=0$, $\dfrac{dy}{dx}=0$ at $x=0$, and $y=1$ at $x=1$, the value of $y$ at $x=2$ is __________
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457
GATE2017-17
During protein synthesis, tRNAs are NOT involved in charging initiation elongation termination
During protein synthesis, tRNAs are NOT involved incharginginitiationelongationtermination
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458
GATE2017-18
In eukaryotes, cytokinesis is inhibited by cytochalasin D vinblastine nocodazole colchicine
In eukaryotes, cytokinesis is inhibited bycytochalasin Dvinblastinenocodazolecolchicine
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459
GATE2017-19
A proto-oncogene is suspected to have undergone duplication in a certain type of cancer. Of the following techniques, which one would verify the gene duplication? Northern blotting Southern blotting South western blotting Western blotting
A proto-oncogene is suspected to have undergone duplication in a certain type of cancer. Of the following techniques, which one would verify the gene duplication?Northern...
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460
GATE2017-20
A polymerase chain reaction (PCR) was set up with the following reagents: DNA template, Taq polymerase, buffer, dNTPs, and Mg$^{2+}$. Which one of the following is missing in the reaction mixture? Helicase Single-stranded binding proteins Primers Reverse transciptase
A polymerase chain reaction (PCR) was set up with the following reagents: DNA template, Taq polymerase, buffer, dNTPs, and Mg$^{2+}$. Which one of the following is missin...
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464
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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465
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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466
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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468
GATE2017-28
The angle (in degrees) between the vectors $\overrightarrow{x}= \hat{i}-\hat{j}+2 \hat{k}$ and $\overrightarrow{y} = 2 \hat{i} – \hat{j}-1.5 \hat{k}$ is _________
The angle (in degrees) between the vectors $\overrightarrow{x}= \hat{i}-\hat{j}+2 \hat{k}$ and $\overrightarrow{y} = 2 \hat{i} – \hat{j}-1.5 \hat{k}$ is _________
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469
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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470
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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471
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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472
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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474
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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475
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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476
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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477
GATE2017-37
The value of $c$ for which the following system of linear equations has an infinite number of solutions is ________ $\begin{bmatrix}1 & 2 \\ 1 & 2 \end{bmatrix} \begin{bmatrix} x \\ y \end{bmatrix} = \begin{bmatrix} c \\ 4 \end{bmatrix}$
The value of $c$ for which the following system of linear equations has an infinite number of solutions is ________ $$\begin{bmatrix}1 & 2 \\ 1 & 2 \end{bmatrix} \begin{b...
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478
GATE2017-38
Match the plant hormones in $\textbf{Column I}$ with functions in $\textbf{Column II}$ ... $\text{P-3, Q-1, R-2, S-4}$ $\text{P-2, Q-1, R-4, S-3}$
Match the plant hormones in $\textbf{Column I}$ with functions in $\textbf{Column II}$$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} && \text{Column II} \\ \hline ...
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480
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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