The puffed-up appearance of dough is due to the production of :

DNA fingerprinting works on the principle of

Which one of the following layers of microsporangium nourishes the developing pollen grains?

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.
Which of the following cells are involved in phagocytosis and destruction of microbes?

Typhoid is caused by -

Which is not an example of broadly utilitarian concept of biodiversity conservation?

Arrange the following events in correct order pertaining to sewage treatment plant?
(A) Bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide.
(B) Primary effluent is passed into aeration tank for the growth of microbes into flocs
(C) A small part of activated sludge is pumped back into aeration tank as inoculum and remaining to anaerobic sludge digesters.
(D) The bacteria and fungi in the sludge are digested by another kind of bacteria
Choose the correct answer from the options given below:

Arrange the following in increasing order of their basic strength in aqueous phase :
(A) \(CH_{3}NH_{2}\)
(B) \(C_{6}H_{5}CH_{2}NH_{2}\)
(C) \(C_{6}H_{5}NH_{2}\)
(D) \((CH_{3})_{3}N\)
Choose the correct answer from the options given below :

The integrating factor of the differential equation \(x \frac{d y}{d x}-y=2 x^2\) is :

Two slits are kept 1 mm apart and the screen is placed 1.0 m away. What is the fringe separation when blue-green light of wavelength 500 nm is used ?

The detritus food chain (DFC) has at the first tropic level.

Identify the gas which was not used by Miller's in his classic experiment:

Calculate the magnetic moment of \(K _4\left[ Mn ( CN )_6\right]\) complex: