A thermostable DNA polymerase used in polymerase chain reaction is obtained from which of the following ?

Use of bio-resources without proper authorization from the concerned countries is termed as:

The genetic disorder caused due to presence of an additional copy of the chromosome number 21 is:

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Malignant malaria is caused by -

Which of the statements are correct about Thalassemia?
A. In ẞ Thalassemia, production of a globulin chain is affected and in a Thalassemia production of B globulin chain is affected.
B. a Thalassemia is controlled by two closely linked genes HBA1 and HBA2.
C. The genes HBA1 and HBA2 are located on chromosome 11 of each parent.
D. ẞ Thalassemia is controlled by a single gene HBB.
E. The gene HBB is located on chromosome 16 of each parent.
Choose the correct answer from the options given below:

Read the passage carefully and answer the given questions.
DNA Fingerprinting
Polymorphism in DNA sequence is the basis of genetic mapping of the human genome as well as of DNA fingerprinting. DNA fingerprinting involves identification of differences in some specific regions in the DNA sequence called repetitive DNA. It works on the principle of polymorphisms in DNA sequences. The repetitive DNA are separated from bulk genomic DNA. The bulk DNA forms a major peak and the other small peaks are referred to as satellite DNA. These repetitive/satellite DNA sequences show a high degree of polymorphisms and form the basis of DNA fingerprinting.
DNA polymorphism forms the basis of

The process of transformation of spermatids into spermatozoa is known as

Identify the commensalism from the following associations:

Recombinant DNA technology involves the following steps in a specific
sequence.
(A) Culture of the host cell
(B) Extraction of desired product
(C) Isolation of desired DNA fragments
(D) Transformation of the recombinant DNA into the host cell
Arrange these sequences correctly and choose the correct answer from
the options given below:

Which of the following statement is/are correct for complex \([NiCl_4]^{2-}\) ?
(A) Ni has oxidation state +2
(B) Cl is a weak field ligand
(C) Compound is paramagnetic
(D) \(d s p^2\) hybridisation
(E) Low spin complex
Choose the correct answer from the options given below :

AOB is a right angled triangle. Charges \( Q_1 \) and \( Q_2 \) are placed as shown. If the resultant electric field at O is perpendicular to the hypotenuse then \( \frac{Q_1}{Q_2} \) is proportional to :

Two thin lenses of focal lengths \( f_1 \) and \( f_2 \) are in contact and coaxial. The power of the combination is:

Which of the following is helpful in removing oil stains from the clothes ?