Which of the following are not associated to Lac Operon?
(A) Lysozyme
(B) ß-galactosidase
(C) Chitinase
(D) Transacetylase
Choose the correct answer from the options given below:

Aneuploidy refers to the:

Which of the following components were taken by S.L. Miller in a closed flask for his experiment on the origin of life?
(A) CH₄
(B) NH₃
(C) CO₂
(D) Water vapours
Choose the correct answer from the options given below:

Read the passage carefully to answer the questions given below
Some strains of `Bacillus thuringiensis` produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). In `Bacillus thuringiensis` the toxin is coded by a gene `crylAc` named cry. There are a number of them, for example, the proteins encoded by the genes `crylAc` and `cryllAb` control the cotton bollworms, that of `crylAb` controls corn borer. Using conventional methods of diagnosis (serum and urine analysis, etc.) early detection is not possible. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. The disorder is caused due to the deletion of the gene for adenosine deaminase. `RNAi` takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific `mRNA` due to a complementary `dsRNA` molecule that binds to and prevents translation of the `mRNA`.
The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency.
This disorder is caused due to the deletion of the gene for -

The process of evolution of different species in a given geographical area starting from a point and dispersing to other areas is called as:

Arrange the following steps of gel electrophoresis in correct sequence:
(A) Staining the DNA with ethidium bromide
(B) Movement of DNA fragments towards anode under an electric field through agarose
(C) Exposure to UV radiation
(D) Separation of DNA fragments according to their size
Choose the correct answer from the options given below:

Arrange the following steps of Polymerase Chain Reaction in proper sequence.
(A) Amplification of DNA
(B) Annealing of primer
(C) Extension of primer
(D) Denaturation of ds DNA
Choose the correct answer from the options given below:

The number of electric lines of force originating from a charge of 1 C is:

If \(x^2+2 x y+y^3=10\), then the value of \(\frac{d y}{d x}\) is:

Termination of protein synthesis occurs by binding of release factors to

Of the incident solar radiation, what is the percentage of photosynthetically active radiation (PAR)?

Read the passage carefully and answer the Questions
Haloalkanes undergo nucelophilic substitution reactions owing to the polarity of CX bond. The nucleophile reacts with the haloalkane on the carbon possessing a partial positive charge holding the halogen atom. The halogen atom X is replaced by a nucleophile. Depending on the kinetics and mode of bond breaking, the mechanism can be either SN1 or SN2 reaction. The rate of SN1 reaction is governed by the stability of carbocation and in SN2 reaction, the rate of reaction is governed by steric factor. Chirality is the main factor in both SN1and SN2. In SN1 reaction, the chirality of alkyl halide is accompanied by racemization of the product, while in SN2 reaction, the product is characterized by inversion of configuration. The structure of alkyl halide and the nature of the solvent also governs the mechanism of the substitution.
What is meant by the term racemic mixture?

If \(P, Q\) and \(R\) are three singular matrices given by
\(P=\left[\begin{array}{cc}2 & 3 a \\4 & 3\end{array}\right], Q=\left[\begin{array}{cc}b & 5 \\2 a & 6\end{array}\right]\)
and \(R=\left[\begin{array}{cc}a^2+b^2-c & 1-c \\ c+1 & c\end{array}\right]\), then the value of \((2 a+6 b+17 c)\) is: