Recent questions without answers

Determine the correctness or otherwise of the following Assertion $[\text{a}]$ and the Reason $[\mathrm{r}]$.Assertion $[\mathrm{a}]$: In multicellular organisms, cells o...

Determine the correctness or otherwise of the following Assertion $[\text{a}]$ and the Reason $\text{[r]}$.Assertion $\text{[a]}$: Chromosome mutations can change the str...

C-value paradox refers tothe lack of correlation between genome size and genetic complexity of an organismthe presence of genetic sequences that propagate themselves with...

Dendritic cells are involved in cross-presentation of antigens. Which of the following protein(s) is(are) required for cross-presentation?P. Basic leucine zipper ATF-like...

Which one of the following is required for the development of B-cells in the bone marrow?Stromal cellsDendritic cellsKupffer cellsNK cells

Which one of the following statements is TRUE about leghemoglobin?It binds oxygen to protect nitrogenaseIt binds hemoglobin to protect oxygenaseIt binds oxygen to protect...

Intracellular proteins are targeted for proteolytic degradation in proteasomes upon conjugation with ubiquitinintegrinpeptidasecalreticulin

In ELISA, which of the following enzymes are conjugated to antibodies for detection of the analyte?P. Alkaline phosphataseQ. TrypsinaseR. Horseradish peroxidaseS. Amylase...

In hybridoma technology, which one of the following enzymes is absent in the myeloma cells that are used for monoclonal antibody production?Hypoxanthine-guanine phosphori...

Which of the following methods are used for detection of DNA and RNA, respectively?Southern and Northern blotting Southern and Western blottingNorthern and Southern blott...

Match the types of RNA in Group I with their corresponding function in Group II.Group IGroup IIP. mRNA1. Serves as adaptors between mRNA and amino acids during protein sy...

Which one of the following programs is used for finding distantly related (or remote) protein homologs?BLASTNBLASTXPSI-BLASTTBLASTX

Which one of the following is used for global alignment of two protein sequences?Chou-Fasman methodGarnier-Osguthorpe-Robson (GOR) methodNeedleman-Wunsch algorithmSmith-W...

Fabry disease in humans is a X-linked disease. The probability (in percentage) for a phenotypically normal father and a carrier mother to have a son with Fabry disease is...

The value of $\lim _{x \rightarrow 0}\left[\frac{\cos 2 x-\cos 4 x}{x^{2}}\right]$ is ___________.

Two fair six-sided dice are thrown. The probability of getting $12$ as the product of the numbers on the dice (rounded off to two decimal places) is __________.

If $7^{3 x}=216$, the value of $7^{-x}$ (rounded off to three decimal places) is _____________.

The distance between the two points of intersection of $x^{2}+y=7$ and $x+y=7$ (rounded off to two decimal places) is ___________.

Match the immune tolerance mechanisms in Group I with their respective outcomes in Group II.Group IGroup IIP. Anergy1. Elimination of activated T-cells after antigen clea...

Match the type of bacteria in Group I with their respective growth properties in Group II.Group IGroup IIP. Halophile1. Grows optimally between $20^{\circ} \mathrm{C}$ an...

Match the virus in Group I with the type of genome it contains in Group II.Group IGroup IIP. T4 bacteriophage1. dsRNAQ. SARS-CoV-22. ssDNAR. Pseudomonas phage $\phi 6$3. ...

The event(s) that lead(s) to inactivation of tumor suppressor genes in cancer cells is(are)gene amplificationpromoter methylationloss of heterozygosityhistone acetylation

Methylation of $\mathrm{CpG}$ islands near the promoter of a gene can inhibit transcription bypreventing RNA polymerase bindingfacilitating repressor bindingfacilitating ...

Which of the following statement(s) is(are) TRUE about induced pluripotent stem cells?They can self-renewThey require specific signals to maintain their stemnessThey cann...

Which of the following statement(s) is(are) TRUE about fluoroquinolone drugs?They contain quinolone ring(s)They inhibit RNA polymeraseThey bind to bacterial topoisomerase...

Which of the following is(are) plant protoplast fusogenic agent(s)?Sodium nitratePolyvinyl alcoholPolyethylene glycolBromoxynil

Direct DNA transfer method(s) used for plant genetic engineering is(are)microparticle bombardmentelectroporationpolyethylene glycol treatmentAgrobacterium-mediated transf...

Which of the following vector(s) is(are) used to clone a DNA fragment of size $220 \mathrm{~kb}$?Bacterial artificial chromosomeYeast artificial chromosomeCosmids$\text{p...

Temperature of a reaction with an activation energy value of $15 \mathrm{kcal} \mathrm{mol}^{-1}$ is increased from $300 \mathrm{~K}$ to $310 \mathrm{~K}$. If the value o...

Aqueous two-phase extraction is used to recover } \alpha \text {-amylase from a solution. A polypropylene glycol-dextran mixture is added and the solution separates into ...

E. coli cultivated at $298 \mathrm{~K}$ uptakes an uncharged compound (A) by passive diffusion. The intracellular and extracellular concentrations of $\mathrm{A}$ are $0...

If there are three unrooted trees for four protein sequences, the number of rooted trees for the same number of sequences is _______________.

The number of different possible ways of forming five intramolecular disulfide bonds with ten cysteine residues of a protein is ______________.

The following schematic diagram shows a chemostat with cell recyclewhere $\mathrm{F}_0$ and $\mathrm{F}_{\mathrm{r}}$ are the volumetric flow rates (in $L \cdot h^{-1}$ )...

An enzyme (E) catalyzes the biochemical reaction $A \rightarrow B$ with $k_{c a t}$ equal to $500 s^{-1}$. If the initial reaction velocity $\left(V_{0}\right)$ is $10 \m...

DNA sample collected from an unidentified bacterial species $(Y)$ contains $13 \%$ of adenine. The $G+C$ content (in percentage) of $Y$ is ____________.

If $1000 \mathrm{bp}$ of a double-helical DNA weighs $1 \times 10^{-18} \mathrm{gm}$ and distance between two $\mathrm{bp}$ is $0.34 \mathrm{~nm}$, the total amount of DN...

A protein has three identical sites arranged at the vertices of an equilateral triangle. If one site is filled with a dye (donor), the measured quantum yield $\left(\phi_...

If $A=\left(\begin{array}{ll}1 & 2 \\ 3 & 5\end{array}\right)$, the value of $\left|A^{4}+3 A^{2}-5 A+6 I\right|$ is _____________.

If $f(x)=\frac{\sin x+\cos x}{\sin x-\cos x}$, the value of $f^{\prime}(x)$ at $x=0$ is ___________.