Amniocentesis is not legally used to test:

Arrange the following cells in correct sequence of oogenesis:
(A) Secondary oocyte
(B) Oogonia
(C) Primary oocyte
(D) Ovum
Choose the correct answer from the options given below:

Read the given paragraph carefully and answer the following questions:
Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. This can be achieved by treating the bacterial cells/plant or animal tissue with enzymes such as lysozyme (bacteria), cellulase (plant cells), chitinase (fungus). There are some basic steps in genetically modifying an organism (i) identification of DNA with desirable genes; (ii) introduction of the identified DNA into the host; (iii) maintenance of introduced DNA in the host and transfer of the DNA to its progeny. Agrobacterium tumifaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as 'T-DNA' to transform normal plant cells into a tumor and direct these tumor cells to produce the chemicals required by the pathogen. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol. Selection of recombinants due to inactivation of antibiotics is a cumbersome procedure because it requires simultaneous plating on two plates having different antibiotics. Therefore, alternative selectable markers have been developed which differentiate recombinants from non-recombinants on the basis of their ability to produce colour in the presence of a chromogenic substrate. In this, a recombinant DNA is inserted within the coding sequence of an enzyme, ß-galactosidase. This results into inactivation of the gene for synthesis of this enzyme, which is referred to as insertional inactivation.
Which one gives blue colored colonies if the plasmid in the bacteria does not have an insert?

Match List-I with List-II

List-I (Evolutionary stages of human species)	List-II (Time of origin)
(A) Ramapithecus	(I) About 1.5 million years ago
(B) Neanderthal man	(II) About 2 million years ago
(C) Australopithecines	(III) 1,00,000-40,000 years ago
(D) Homo erectus	(IV) About 15 million years ago

Choose the correct answer from the options given below:

A student got data showing productivity of three different ecosystems, but the unit was missing, Choose the correct unit.

In organisms, the same structure developed along different directions due to adaptations to different needs. This refers to:

Observe the illustration and answer the following question:



Match List I with List II.

LIST I	LIST II
A. Spermatozoa	I. Embedding of sperms
B. Primary spermatocyte	II. Androgen secretion
C. Leydig cells	III. Male gamete
D. Sertoli cells	IV. Diploid cell

Choose the correct option from the ones given below:

The compound representing a vinylic bromide is:

The colour of the third band of a colour coded carbon resistor of resistance \(2.3 \times 10^2 \Omega\) would be

The magnetic moment of a current loop is \( 2.1 \times 10^{-25} \text{ A m}^{2} \). The magnetic field on the axis of the loop at a distance of 1.0 \( \text{\AA} \) from the loop would be : (Given radius of loop negligible)

The rate constant for the first order reaction is \(60\) \(s^{-1}\). The time taken to reduce the initial concentration of the reactant to its \(1/26^{th}\) value is:
[Given \(\log 26 = 1.4150\)]

Read the passage given below and answer the question.
Phenols and Alcohol have the same function group (-OH) but phenols are stronger acids than alcohol due the resonance stabilization of phenoxide ion than alkoxide ion (-RO\(^{-}\)). Electron withdrawing groups tend to increase the acidic strength while electron releasing groups tend to decrease it.
Compound 'A' on reaction with Conc. HCl and anhydrous \(ZnCl_2\), gives turbidity immediately.
Compound 'A' is :

2.0 g of benzoic acid dissolved in 25 g of benzene shows a depression in freezing point of 1.62 K. Molal depression constant \(K_f\) of benzene is \(4.9\text{ K kg mol}^{-1}\). What is the percentage association of the acid?