Recent questions without answers

A complete restriction digestion of a circular plasmid $(5000bp)$ was carried out with $HindIII,BamHIandEcoRIindividually.$ Restriction digestion yielded following fragme...

The total number of fragments generated by the complete and sequential cleavage of the polypeptide given below by Trypsin followed by $CNBr$ is __________.$Phe-Trp-Met-Gl...

In a genetic study, $80$ people were found to have alleles for polydactyly. Only $36$ of them were polydactylous. What is the extent of penetrance percentage? ___________...

One percent of the cars manufactured by a company are defective. What is the probability (upto four decimals) that more than two cars are defective, if $100$ cars are pro...

The maximum cell concentration $(\text{g l}^{-1})$ expected in a bioreactor with initial cell concentration of $\text{1.75 g l}^{-1}$ and an initial glucose concentration...

The activity of an enzyme was measured by varying the concentration of the substrate $(S)$ in the presence of three different concentrations of inhibitor $\text{(I) 0, 2 ...

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

Determine the correctness or otherwise of the following $\text{Assertion (a) and Reason (r)}$.$\text{Assertion:}$ $\text{UPGMA}$ method produces ultrametric tree.$\text{R...

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

Evaluate $\underset{x\rightarrow\infty }{\lim}x\tan\frac{1}{x}$$\infty$$1$$0$$-1$

The Laplace transform of $f(t) = 2t + 6$ is$\frac{1}{s}+\frac{2}{s^2}$$\frac{3}{s}-\frac{6}{s^2}$$\frac{6}{s}+\frac{2}{s^2}$$-\frac{6}{s}+\frac{2}{s^2}$

The solution of the following set of equations is$$x+2y+3z=20$$$$7x+3y+z=13$$$$x+6y+2z=0$$$x=-2, y=2, z=8$$x=2, y=-3, z=8$$x=2, y=3, z=-8$$x=8, y=2, z=-3$

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

Determine the correctness or otherwise of the following $\text{Assertion (a)}$ and $\text{Reason (r)}.$$\text{Assertion:}$ Immobilization of plant cells can enhance secon...

Match the cell structures in $\text{Group I}$ with the organisms in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \text{Group I} && \text{Group II} \\ \hline P. & ...

Match the antibiotics in $\text{Group I}$ wiith the targets in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \text{Group I} & & \text{Group II} \\ \hline P. & \t...

In nature, $\text{Agrobacterium tumefaciens}$ mediated infection of plant cells leads toP. crown gall disease in plantsQ. hairy root disease in plantsR. transfer of $\tex...

Match the entries in $\text{Group I}$ with the enzymes in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \text{Group I} && \text{Group II} \\ \hline P. & \text{NAD}...

Match the herbicides in $\text{Group I}$ with the target enzymes in $\text{Group II}$ $\begin{array}{|l|l|l|l|} \hline & \text{Group I} && \text{Group II} \\ \hline P. & ...

One of the eigcn values of $P=\begin{bmatrix}10 & -4 \\ 18 & -12\end{bmatrix}$ is$2$$4$$6$$8$

A callus of $\text{5 g}$ dry weight was inoculated on semi-solid medium for growth. The dry weight of the callus was found to increase by $1.5$ fold after $10$ days of in...

A chemostat is operated at a dilution rate of $0.6\; h^{-1}$. At steady state, the biomass concentration in the exit stream was found to be $30\; gl^{-1}$The biomass prod...

A batch bioreactor is to be scaled up from $\text{10 to 10,000}$ liters. The diameter of the large bioreactor is $10$ times that of the small bioreactor. The agitator spe...

Calculate the percentage sequence identity for the pairwise alignment given below. ______________$\text{HELLO-}$$\text{YELLOW}$

In a batch culture, the specific rate of substrate utilization is $\text{0.25 g (g cell mass)}$$^{-1} h^{-1}$ and specific rate of product formation is $\text{0.215 g (g ...

Match the commercial microbial sources in $\text{Group I}$ with the products in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \text{Group I} & & \text{Group II} \...

The catalytic efficiency for an enzyme is defined as$K_{cat}$$\frac{V_{max}}{K_{cat}}$$\frac{k_{cat}}{K_m}$$\frac{K_{cat}}{V_{max}}$

Of the two diploid species, species $I$ has $36$ chromosomes and species $II$ has $28$ chromosomes. How many chromosomes would be found in an allotriploid individual?$42$...

The $RNA$ primer synthesized during the replication process in bacteria is removed by$DNA$ gyraseprimase$DNA$ polymerase $I$$DNA$ polymerase $II$

The suitable substitution matrix to align closely related sequences is$\text{PAM 250 or BLOSSUM 80}$$\text{PAM 40 or BLOSSUM 80}$$\text{PAM 120 or BLOSSUM 40}$$\text{PAM ...

If $P=\begin{bmatrix}1&1\\2&2\end{bmatrix}, Q=\begin{bmatrix}2&1\\2&2\end{bmatrix}$ and $R=\begin{bmatrix}3&0\\1&3\end{bmatrix}$, which one of the following statements is...

If $u=\log (e^x+e^y),$ then $\frac{\partial u}{\partial x}+\frac{\partial u}{\partial y}=$$e^x+e^y$$e^x-e^y$$\frac{1}{e^x+e^y}$$1$

Hypophosphatemia is manifested by an $X-$linked dominant allele.What proportion of the offsprings from a normal male and an affected heterozygous female will manifest the...

The role of an adjuvant istoprolong the persistence of antigencross link the antigenincrease the size of antigenavoid inflammation

Endogenous antigens are presented on to the cell surface along with$MHC-II$$MHC-I$$F_c\gamma$receptorcomplement receptor

Human genome sequencing project involved the construction of genomic library inbacterial artificial chromosome$pBR322$bacteriophage$pcDNA3.1$

The nucleotide analogue used in DNA sequencing by chain termination method is$l',3'-$dideoxy nucleoside triphosphate$2',3'-$dideoxy nucleoside triphosphate$2',4'-$dideoxy...

In nature, the horizontal gene transfer across bacteria is mediated bygene cloning followed by transformationconjugation and transformationconjugation onlytransformation ...

Phylum proteobacteria is subdivided into $\alpha-, \beta-, \gamma-, \delta-$ and $\epsilon-$ proteobacteria based on$G+C$ content$23S\; rRNA$ sequences$tRNA$ sequences$16...

Which one of the following is an $ABC$ transporter?multidrug resistance proteinacetylcholine receptorbacteriorhodopsin$ATP$ synthase