To avoid the unfavourable conditions, the zooplanktons enter into :

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 one of the following is not the cellular barrier of innate immunity?

The elucidation of the lac operon was the result of close association between the geneticist ______ and the biochemist _______.

The large holes in 'Swiss Cheese' are due to :

Study the following figure and answer the questions:


Choose the correct statements from the following.
A. tRNA has an anticodon loop
B. tRNA look like a inverted J
C. There are no tRNAs for stop codons
D. tRNA has clover-leaf like secondary structure
Choose the correct answer from the options given below:

Transgenic animals are used to understand the contribution of genes in the development of diseases such as:

Which of the following microbes is not used as a biocontrol agent?

The first clinical gene therapy was given in 1990 to a 4-year-old girl with ___________ .

The internal resistance of primary cell is \( 3 \Omega \). It generates a current of \( 0.3 \text{ A} \) in an external resistance of \( 22 \Omega \). The rate at which chemical energy is consumed in providing the current is:

Let \(\vec{a}\) be a non-zero vector of magnitude \(a\) and \(\lambda\) is a non-zero scalar, then \(\lambda \vec{a}\) is a unit vector if

The shortest wavelengths in the hydrogen spectrum, in decreasing order, for spectral series Pfund, Balmer, Brackett, and Lyman are :

Which of the following statements are correct?
(A) the mid-point between the two similar and equal point charges located nearby, is called neutral point.
(B) There are maximum number of field lines at the neutral point.
(C) The work done to bring any positive charge from infinity to a point in an electric field is called the electric potential at that point.
(D) The work done to move a charge from one point to another point on the equipotential surface will be zero.
Choose the correct answer from the options given below:

Choose the correct statement from the following: