Which of the following is NOT a part of a transcription unit in DNA.

Arrange the given structures involved in packaging of DNA Helix.
(A). Chromatin
(B). Chromatin fibers
(C). Nucleosome
(D). Euchromatin
Choose the correct answer from the options given below:

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 -

Industrial melanism is an observation which supports evolution by:

Which one of the following is an incorrect statement about endosperm
production during double fertilization in plants?

The unit of Productivity in terms of energy is :

Match List - I with List - II.

List I	List ll
(A) Penicillium notatum	(I) Wine
(B) Acetobacter aceti	(II) Curd
(C) Saccharomyces cerevisiae	(III) Antibiotics
(D) Lactobacillus	(IV) Acetic acid

Choose the correct answer from the options given below:

Select the components that are needed to set up a polymerase chain reaction:
(A) Two primers and dNTPs
(B) Template DNA
(C) DNA ligase
(D) DNA polymerase
Choose the correct answer from the options given below:

Which of the following statements are correct for dilute solutions?
(A) The elevation in boiling point is directly proportional to the molality of the solution.
(B) The elevation in boiling point is inversely proportional to the molality of the solution.
(C) The depression in freezing point is directly proportional to the molality of the solution.
(D) The depression in freezing point is inversely proportional to the molality of the solution.
Choose the correct answer from the options given below:

The values of p for which the lines \(\frac{1-x}{3}=\frac{7 y-14}{2 p}=\frac{z-3}{2}\) and \(\frac{7-7 x}{3 p}=\frac{y-5}{1}=\frac{6-z}{5}\) are at right angles is:

Choose the correct option from the following transitions in which the wavelength will be minimum

The flowers which do not open at all are known as:

The number densities of electrons and holes in pure silicon at 273 K are equal and their values are \( 1.5 \times 10^{16} \text{ m}^{-3} \). On doping, the hole density increases to \( 4.5 \times 10^{27} \text{ m}^{-3} \). The electron density in the doped silicon will be :