Which one of the following statements is not correct regarding the DNA?

Secondary productivity is :

Read the Passage carefully and answer the the questions
The DNA fragments can be separated by a technique known as gel electrophoresis. Since DNA fragments are negatively charged molecules, they can be separated by forcing them to move towards the anode under an electric field through a medium/matrix. The separated DNA fragments can be visualised only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiation. The repeated amplification of DNA is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus). After completion of the biosynthetic stage, the product has to be subjected through a series of processes before it is ready for marketing as a finished product. The downstream processing and quality control testing vary from product to product. The convention for naming restriction enzymes is the first letter of the name comes from the genus and the second two letters come from the species of the prokaryotic cell from which they were isolated.
The thermostable DNA polymerase is isolated from -

Arrange the following events of human embryo development in a correct sequence:
(A) Blastocyst formation
(B) Implantation
(C) Formation of morula
(D) Cleavage in zygote
Choose the correct answer from the options given below:

We should not allow mosquitoes to breed in our surroundings because
they

Failure to segregation of chromatids during cell division cycle which involves gain or loss of chromosome(s) is called:

The distance between a base pair (bp) in a DNA helix is approximately:

The potential energy of an electron in the first excited state of hydrogen atom is -6.8 eV. The kinetic energy of the electron in its ground state will be :

The value of \(\tan \left\{2 \tan ^{-1}\left(\frac{1}{5}\right)+\pi / 4\right\}\) is :

Let \(A\) and \(B\) be independent events such that \(P(A)=0.3\) and \(P(B)=0.4\), then
Match List-l with List-ll

List-I	List-II
(A) \(P(A \cap B)\)	(I) 0.3
(B) \(P(A \cup B)\)	(II) 0.4
(C) \(P(A \mid B)\)	(III) 0.12
(D) \(P(B \mid A)\)	(IV) 0.58

Choose the correct answer from the options given below :

When the electron in a hydrogen atom jumps from the 2nd orbit to the 1st orbit, the wavelength of the radiation emitted is \(\lambda\).
When the electron jumps from the 3rd orbit to the 1st orbit, the wavelength of emitted radiation is:

'r' in exponential growth equation implies:

Widal test is used to diagnose: