Failure of chromatids to segregate during cell division cycle results in :

Read the following passage carefully and answer the given questions.
Restriction endonuclease on finding its specific recognition sequence, bind to the DNA and cut each of the two strands of the double helix at specific points in their sugar -phosphate backbones. Each restriction endonuclease recognises a specific palindromic nucleotide sequences in the DNA. 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). Now a days the most commonly used matrix is agarose which is a natural polymer extracted from sea weeds. The DNA fragments separate (resolve) according to their size through sieving effect provided by the agarose gel. The first restriction endonuclease-Hind II, whose functioning depended on a specific DNA nucleotide sequence was isolated and characterised five years later. It was found that Hind II always cut DNA molecules at a particular point by recognising a specific sequence of six base pairs. In addition to 'ori', the vector requires a selectable marker, which helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants. Transformation is a procedure through which a piece of DNA is introduced in a host bacterium. Normally, the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers for E. coli.
Each restriction endonuclease recognises a specific _______ in the DNA.

Arrange the following events chronologically as they occur during embryonic development.
(A) Appearance of heart sounds
(B) Development of limbs and digits
(C) Formation of three primary germ layers
(D) Separation of eyelids
Choose the correct answer from the options given below:

Read the given paragraph and answer the given question :
Parasitism has evolved in many taxonomic groups from plants to higher vertebrates. Many parasites have evolved to be host specific in such a way that both host and the parasite tend to co-evolve. In accordance with their life styles, parasite evolve special adaptations and complex life cycle.
The complex life cycle of a parasite means:

Which of the following is NOT a technique of genetic engineering?

In 1997, the first transgenic cow, Rosie, produced human protein-enriched milk. The milk contained the _________ and was nutritionally a more balanced product for human babies than natural cow-milk.

Read the following paragraph carefully and answer the given questions.
In the year 1963 the two enzymes responsible for restricting the growth of bacteriophage in E. coli were isolated. The first restriction endonuclease - Hind II, whose functioning depended on a specific DNA nucleotide sequence was characterized five years later. It was found that Hind II always cut DNA molecules at a particular point by recognizing a specific sequence of six base pairs. This specific base sequence is known as the recognition sequence for Hind II. Besides Hind II, today we know more than 900 restriction enzymes that have been isolated from over 230 strains of bacteria, each of which recognize different recognition sequences.
Restriction enzymes are also known as

Which of the following shows the correct relation between electric Intensity \(E\), and electric potential \(V\) :

The interval in which \(y=x^2 e^{-x}\) is strictly increasing is:

Match List - I and List - II

LIST – I (Name of vitamins)	LIST – II (Deficiency Disesse)
(A) Vitamin - A	(I) Increase in fragility of RBC
(B) Vitamin - E	(II) Increased blood clotting time
(C) Vitamin - C	(III) Xerophthalmia
(D) Vitamin - K	(IV) Scurvy

Choose the correct answer from the options given below:

Which of the following properties are desired in materials for permanent magnets ?
(A) High retentivity
(B) High coercivity
(C) High permeability
(D) low permeability
Choose the correct answer from the options given below:

For an LPP: Maximize \(z=3 x+9 y; x \geq 0, y \geq 0\), the feasible region \(O A B\) is shown in the figure, then the other constraints are:

Ferromagnetic material in transformers should have :