Recent questions in General Biology

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

Which one of the following is NOT a product of denitrification in Pseuadomonas?$N_2$$N_2O$$NO_2^-$$NH_4^+$

Production of monoclonal antibodies by hybridoma technology requiressplenocytesosteocyteshepatocytesthymocytes

Which one of the following is INCORRECT about a typical apoptotic cell?Phosphatidylserine is presented on the outer cell surfaceCytochrome c is released from mitochondria...

Identify the file format given below:$>$P$1$; JMFDProtein X – Homo sapiensMKALTARQQEVFDLIRDHISRTLRQQGDWLGDEFASTANBRFGCG

How many $3$-tuples are possible for the following amino acid sequence?MADCMWDISEASE$4$$5$$11$$12$

How many different protein sequences of $100$ residues can be generated using $20$ standard amino acids?$100^{20}$$100 \times 20$$20^{100}$$100! \times 20!$

Which one of the following graphs represents uncompetitive inhibition?

The interaction between an antigen $(Ag)$ and a single-chain antibody $(Ab)$ was studied using Scatchard analysis. The result is shown below.The affinity of interaction a...

How many rooted and unrooted phylogenetic trees, respectively, are possible with four different sequences?$3$ and $15$$15$ and $3$$15$ and $12$$12$ and $3$

Match the compounds in $\text{Group I}$ with the correct entries in $\text{Group II}$.$\begin{array}{|l|l|l|l|}\hline & \textbf{Group I} & & \textbf{Group II} \\ \hline ...

Match the drugs in $\text{Group I}$ with their mechanism of action in $\text{Group II}$$\begin{array}{|l|l|l|l|} \hline & \textbf{Group I} && \textbf{Group II} \\ \hline ...

Match the cells in $\text{Group I}$ with their corresponding entries in $\text{Group II}$$\begin{array}{|l|l|l|l|} \hline & \textbf{Group I} && \textbf{Group II} \\ \hlin...

Plasmid DNA $(0.5 \: \mu g)$ containing an ampicillin resistance marker was added to $200 \: \mu l$ of competent cells. The transformed competent cells were diluted $10,0...

Match the reagents in $\text{Group I}$ with their preferred cleavage sites in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \text{Group I} && \text{Group II} \\ \...

$\textit{Saccharomyces cerevisiae}$ produces ethanol by fermentation. The theoretical yield of ethanol from $2.5$ g of glucose is _________ g.

Match the antibiotics in $\text{Group I}$ with their modes of action in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \text{Group I} && \text{Group II} \\ \hline ...

Consider the following multiple sequence alignment of four DNA sequences.$$\begin{array}{cccc} A & C & T & A \\ A & C & T & G \\ A & G & T & C \\ A & G & C & T \end{arra...

The $K_i$ of a novel competitive inhibitor designed against an enzyme is $2.5 \: \mu M$. The enzyme was assayed in the absence or presence of the inhibitor $(5 \: \mu M)$...

Assuming random distribution of nucleotides, the average number of fragments generated upon digestion of a circular DNA of size $4.3 \times 10^5$ bp with $\textit{Alu}I (...

An $\textit{in vitro}$ translation system can synthesize peptides m all three reading frames of the RNA template. When $\text{5’ - UCUCUCUC - (UC)_n -UCUCUCUC - 3’}$ was...

Three distinct antigens $X, Y$ and $Z$ were used to raise antibodies. Antigen $Z$ was injected in a mouse on day zero followed by the administration of antigens $X$ and $...

Cytoplasmic extract from the wild type strain of a bacterium has the ability to convert a colorless substrate $(S)$ to a colored product $(P)$ via three colorless interme...

Samples of bacterial culture taken at $5$ PM and then the next day at $5$ AM were found to have $10^4$ and $10^7$ cells.mL${-1}$, respectively. Assuming that both the sam...

If the dissociation constant for solute-adsorbent binding is $K_D$, the retention time of the solute in a chromatography columnincreases with increasing $K_D$decreases wi...

The most plausible explanation for a sudden increase of the respiratory quotient $(RQ)$ of a microbial culture is thatcells are dyingyield of biomass is increasingthe fer...

Gram-positive bacteria are generally resistant to complement-mediated lysis becausethick peptidoglycan layer prevents insertion of membrane attack complex into the irmer ...

A bacterium belonging to cocci group has a diameter of $2\:\mu m.$ The numerical value of the ratio of its surface area to volume (in $\mu m^{-1}$) is _______.

Which of the following essential element(s) is/are required as major supplement to enhance the bioremediation of oil spills by the resident bacteria?SulfurNitrogen and ph...

The product(s) resulting from the hydrolysis of maltose is/area mixture of $\alpha$-D-Glucose and $\beta$-D-Glucosea mixture of D-Glucose and L-Glucose$\alpha$-D-Glucose ...

Amino acid residue which is most likely to be found in the interior of water-soluble globular proteins isThreonineAspartic acidValineHistidine

Reactions between antibodies and antigens that are detected by precipitate formation in an agar gel are referred asimmunoprecipitation assayimmunodiffusion assayimmunoagg...

The algorithm for BLAST is based onDynamic ProgrammingHidden Markov Modelk-tuple analysisNeural Network

The statistical frequency of the occurrence of a particular restriction enzyme cleavage site that is $6$ bases long can be estimated to beonce every $24$ basesonce every ...

The reactions leading to the formation of amino acids from the TCA cycle intermediates arecarboxylationisomerizationtransaminationdecarboxylation

The growth medium for mammalian cells contains serum. One of the major functions of serum is to stimulate cell growth and attachment. However, it must be filter sterilize...

Cholera toxin increases $cAMP$ levels bymodifying $G_i$ proteinmodifying $G_s$ proteinbinding to adenylate cyclaseactivating $cAMP$ phosphodiesterase

Triose phosphate isomerase converts dihydroxy acetone phosphate $(DHAP)$ to glyceraldehyde-3-phosphate $(G-3-P)$ in a reversible reaction. At $\text{298 K and pH 7.0,}$ t...

Topological Winding number of a $\text{2.0 kb}$ covalently closed circular DNA was found to be $191$ with a writhing number of $-4$. Hence, its $\text{LINKING NUMBER}$ an...