Recent questions without answers

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

What is the rank of the following matrix?$$\begin{bmatrix}5 & 3 & -1\\ 6 & 2 & -4 \\14 & 10 & 0 \end{bmatrix}$$$0$$1$$2$$3$

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

Determine the correctness or otherwise of the following $Assertion$ (a) and $Reason$ (r).$Assertion:$ The production of secondary metabolites in plant cell cultures is en...

Synteny refers togene duplication from a common ancestora tree representation of related sequencesthe extent of similarity between two sequenceslocal conservation of gene...

While searching a database for similar sequences, E value does NOT depend on thesequence lengthnumber of sequences in the databasescoring systemprobability from a normal ...

In transmission electron microscopy, electron opacity is greatly enhanced by treating the specimen withferrous ammonium sulfateuranium acetatesodium chloridebasic fuchsin

The molarity of water in a water : ethanol mixture ($15 : 85$, v/v) is approximately$0.85$$5.55$$8.5$$55.5$

The helix content of a protein can be determined usingan infrared spectrometera fluorescence spectrometera circular dichroism spectrometera UV-Visible spectrophotometer

Which one of the following DNA sequences carries an invert repeat?ATGAGCCCCGAGTATACTCGGGGCTCATATGAGCCGGCTCTATACTCGGCCGAGATATGAGCCGAGCCTAACTCGGCTCGGATATGAGCCTATGGTATACTCGG...

In zinc finger proteins, the amino acid residues that coordinate zinc areCys and HisAsp and GluArg and LysAsp and Arg

Protein-DNA interactions $\text{in vivo}$ can be studied bygel shift assaySouthern hybridizationchromatin immunoprecipitation assayfluorescence $\text{in situ}$ hybridiza...

The direction of shell coiling in the snail $\text{Limnaea peregra}$ is a classic example ofchromosomal inheritanceextra-chromosomal inheritancechromosomal translocationh...

During photorespiration under low $CO_2$ and high $O_2$ levels, $O_2$ reacts with ribulose1,5- bisphosphate to yieldone molecule each of 3-phosphoglycerate and 2-phosphog...

Which one of the following is NOT a protoplast fusion inducing agent?Inactivated Sendai virus$Ca^{2+}$ at alkaline pHPolyethylene glycolColchicine

The activity of an enzyme is expressed in International Units (IU). However, the S.I unit for enzyme activity is Katal. One Katal is$1.66 \times {10^4}$ IU$60$ IU$6 \time...

Identify the statement that is NOT applicable to an enzyme catalyzed reaction.Enzyme catalysis involves propinquity effectsThe binding of substrate to the active site cau...

An example of a derived protein structure database isPfamSCOPGEOProsite

An example of a program for constructing a phylogenetic tree isphylipphrapprodomPHDsec

A humanized antibody is one in which theheavy and light chains are from humanheavy chain is from human and light chain is from mouselight chain is from human and heavy ch...

Dimethyl sulfoxide (DMSO) is used as a cryopreservant for mammalian cell cultures becauseit is an organic solventit easily penetrates cellsit protects cells by preventing...

Nude mice refers tomice without skinmice without thymusknockout micetransgenic mice

Heat inactivation of serum is done to inactivateprionsmycoplasmacomplementpathogenic bacteria

Choose the correct signal transduction pathway.Hormone $\to$ 7 TM receptor $\to$ G protein $\to$ cAMP $\to$ PKAHormone $\to$ G protein $\to$ 7 TM receptor $\to$ cAMP $\t...

A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protein can be generated by substituting that serine withglycinealanineaspartatethreonine

A truncated polypeptide is synthesized due to a nonsense mutation. Where would you introduce another mutation to obtain a full-length polypeptide?Ribosomal protein geneTr...

The basis for blue-white screening with $pUC$ vectors isintraallelic complementationintergenic complementationintragenic suppressionextragenic suppression

Idiotypic determinants of an antibody are associated with theconstant region of the heavy chainsconstant region of the light chainsvariable regionconstant regions of ligh...

Identification of blood groups involvesprecipitationneutralizationopsonizationagglutination

B-lymphocytes originate from the bone marrow whereas T-lymphocytes originate fromthymusbone marrowspleenliver

In mismatch correction repair, the parental DNA strand is distinguished from the daughter strand byacetylationphosphorylationmethylationglycosylation

An automobile travels from city A to city B and returns to city A by the same route. The speed of the vehicle during the onward and return journeys were constant at $60$ ...

A set of $4$ parallel lines intersect with another set of $5$ parallel lines. How many parallelograms are formed?$20$$48$$60$$72$

To pass a test, a candidate needs to answer at least $2$ out of $3$ questions correctly. A total of $6,30,000$ candidates appeared for the test. Question A was correctly ...

If $x^2 + x – 1 = 0$ what is the value of $x^4 + \dfrac{1}{x^4}$?$1$$5$$7$$9$

In a detailed study of annual crow births in India, it was found that there was relatively no growth during the period $2002$ to $2004$ and a sudden spike from $2004$ to ...

"When she fell down the __________, she received many __________ but little help."The words that best fill the blanks in the above sentence arestairs, staresstairs, stair...

In spite of being warned repeatedly, he failed to correct his _________ behaviour."The word that best fills the blank in the above sentence isrationalreasonableerrantgood

For $0 \leq x \leq 2\pi$, $\sin x$ and $\cos x$ are both decreasing functions in the interval __________.$\bigg( 0, \dfrac{\pi}{2} \bigg) \\$$\bigg( \dfrac{\pi}{2}, \pi ...

The area of an equilateral triangle is $\sqrt{3}$. What is the perimeter of the triangle?$2$$4$$6$$8$