Recent activity in General Biology

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The catalytic efficiency of an enzyme following Michaelis-Menten kinetics is defined by$k_{\text {Cat }}$$V_{\max } / k_{\mathrm{Cat}}$$k_{\text {Cat }} / K_{\mathrm{M}}$...
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Which of the following is/are extra-cellular matrix protein(s)?MyosinFibronectinLaminCollagen
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Which of the following enzyme is involved in the protection of cells from reactive oxygen species?HexokinaseGlucose $6$-phosphate dehydrogenaseEnolasePyruvate kinase
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In the process of generating a clonal mammalian cell line, a single cell was seeded in a well of a cell culture plate. After the first $48$ hours, one of the progeny cell...
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The electron equivalent per liter (e-eq $\mathrm{L}^{-1}$ ) of acetate ion solution of concentration $10 \mathrm{~g} \mathrm{~L}^{-1}$ is $\_\_\_\_$ $\mathrm{e}^{-} \math...
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Which of the following is/are posttranslational modification(s) involved in epigenetic control of gene expression?Arginine methylationLysine acetylationCytosine methylati...
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The RNA sequence below depicts the part of a $330$ nucleotides long $\text{mRNA}$ and it encodes the $\text{C}$-terminal portion of a protein.$5^{\prime}-\ldots \ldots$ $...
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Messenger $\text{RNAs (mRNAs)}$ translate to generate polypeptides and the translation terminates at the $\text{UGA, UAG}$ or $\text{UAA}$ stop codons. The $\text{AGA}$ c...
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By elemental analysis of a biomass sample, it was found that the cells in the given sample are composed of (by weight) $\mathrm{C}=50 \%, \mathrm{H}=8 \%, \mathrm{O}=20 \...
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Match the biomolecules in Column $\text{I}$ with their function given in Column $\text{II}$\[\begin{array}{|l|l|}\hline\text{Column I} & \text{Column II} \\\hline\text{P....
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Match the immunological terms in $\textbf{Column I}$ with their function/description in the $\textbf{Column II}$\[\begin{array}{|l|l|}\hline\textbf{Column I} & \textbf{Co...
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You have purified an enzyme using a series of chromatographic methods. It was observed that a $10 ~\mu \mathrm{g} \mathrm{~mL}^{-1}$ of this purified enzyme converted $10...
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To determine the viable cell count of a bacterial culture, you have plated $50 ~\mu \mathrm{~L}$ of a $100$ -fold diluted sample of the culture on a nutrient agar plate a...
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You are characterizing a new enzyme isolated and purified in the laboratory. If the maximum velocity of the enzyme is $1800 ~\mu$ moles $\mathrm{L}^{-1} \mathrm{~min}^{-1...
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BLAST and its extensions can be used to determine similarity of a query protein sequence with which of the following database(s)?A database of translated nucleotide seque...
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Match the carbohydrates in Column $\text{I}$ with the correct glycosidic linkages involved in Column $\text{II}$.\[\begin{array}{|l|l|}\hline\text{Column I} & \text{Colum...
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The RNA primer synthesized during bacterial DNA replication is removed by $\_\_\_\_$.DNA gyraseDNA Polymerase $\text{I}$PrimaseDNA Polymerase $\text{III}$
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Which one of the following antibiotics blocks protein chain elongation by preventing the action of peptidyl transferase?BleomycinRifampicinChloramphenicolTetracycline
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Which one of the following proteins would elute third in gel filtration chromatography from a mixture of four proteins given below?Insulin $(6 \text{ kDa})$Myoglobin $(17...
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For monoclonal antibody production, hypoxanthine $\_\_\_\_$.allows DNA synthesis in the absence of de novo dTMP synthesisallows purine synthesis in cells containing HGPRT...
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In nitrogen fixation, to reduce nitrogen to ammonia, which one of the following shows the correct order of electron flow?Ferredoxin → reductase → nitrogenaseNADH → reduct...
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Cancer cells display a high level of heterogeneity in the expression of TP$53$ protein. Which of the following techniques can be directly used to determine the intratumor...
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E. coli is inoculated in a shake flask containing nutrient rich medium. The initial number of viable cells in the medium is $10^2$. After few hours, the number of viable ...
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Match the disease (Column I) with its biological vector (Column II).\begin{array}{|c|c|c|}\hline \text{Column I} & \text{Column II} \\\hline P. \text{Chagas disease} & ...
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If the rate at which E. coli divides is $0.5 \mathrm{~h}^{-1}$, then its doubling time is $\_\_\_\_\_\_\_$ $\text{h}$.
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Which one of the following bacteriophages has a genome composed of single stranded circular DNA?$\emptyset \text{X} 174$$\lambda$$\text{T}5$$\text{P}1$
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The relationship that involves the exchange of nutrients between two different species for their mutual growth is called $\_\_\_\_\_\_\_\_$antagonismcommensalismparasitis...
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​​​Correctly match the Microorganisms with their respective Nutrition and energy requirement.\[\begin{array}{|l|}\hline\begin{array}{l|l}\textbf{Microorganisms} & \textbf...
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If the doubling time of a bacterial population is $3$ hours, then its average specific growth rate during this period is $\_\_\_\_\_$ $\mathrm{h}^{-1}$.(Round off to two ...
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​​​​​Corynebacterium diphtheriae causes diphtheria in humans, only when this bacterium is infected byphage $\beta$epsilon phage$T4$ phagelambda phage
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​​​​​Koch's postulate was established by Robert Koch while working on a disease caused byMycobacterium tuberculosisBacillus anthracisStreptococcus pneumoniaeBacillus subt...
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The correct sequence of events during bacteriophage infection of a bacterial cell islanding $\rightarrow$ attachment $\rightarrow$ tail contraction $\rightarrow$ penetrat...
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Which one of the following is an insect cell line?$\text{HEK} 293$$\text{Sf}9$$\text{DH}5$ $\alpha$ $\text{CHO}$
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Terpenoids are made of _________ units.amino acidcarbohydrateisoprenetriacylglycerol
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​​​​​Correctly match the following Monosaccharides with their respective Epimers. Monosaccharide EpimerP.$D$- mannose1.$C-3$ epimer of $D$-glucoseQ.$D$-allose2.$C-4$ epim...
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Prior exposure of plants to pathogens is known to increase resistance to future pathogen attacks.This phenomenon is known assystemic acquired resistancehypersensitive res...
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An NMR spectrometer operating at proton resonance frequency $(v)$ of $1 \: \mathrm{GHz}$ will have a magnetic field strength of $\_\_\_\_$ Tesla (T).The gyromagnetic rati...
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The percentage of light that would pass through a sample with an absorbance of $2$ would be $\_\_\_\_\_$ $\%$ .(Round off to the nearest integer)
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​​​​​Which of the following amino acids contain(s) two chiral carbons?L-LeucineL-ThreonineL-IsoleucineL-Asparagine
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​​​​Which of the following statements is/are true about telomerase?Telomerase has $5^{\prime}-3^{\prime}$ DNA-dependent DNA polymerisation activityTelomerase has $5^{\pri...
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