Identify the hormone releasing IUDs.

Arrange the given steps of DNA packaging in correct sequence?
(A) Histones are organized to form a unit of eight molecules called histone octamer
(B) Nucleosomes form a structure of repeating unit called chromatin
(C) A set of positively charged, basic proteins are called histones
(D) A negatively charged DNA is wrapped around the histone octamer to form a structure known as nucleosome
Choose the correct answer from the options given below:

Which of the following organism does not show 'XO' condition chromosomes?

Darwin's finches and Australian marsupials are an example of:

Which codon has dual functions?

Read the given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
The biogas is a mixture of the following gases

Which one of the following is not a sexually transmitted infection?

Which of the following structures are related to the male reproductive organ.
(A). Isthmus
(B). Sertoli cells
(C). Leydig cells
(D). Prostate
Choose the correct answer option given below.

Which statement is/are true for Gabriel phthalimide synthesis?
A. It is used for the preparation of primary and secondary amines
B. It is only used for the preparation of primary amines
C. Aromatic primary amines can not be prepared by this method
D. Only tertiary amines can be prepared
Choose the correct answer from the options given below:

Identify the enzyme used for the isolation of genetic material from fungal cells.

Which of the following is not the specification of the Sinking Fund?

Which of the following is/are not considered as transition elements?
Ag, Mo, Zn, Hg, W

Read the passage carefully and answer the questions based on the passage:
Pest Resistance Plants
Various nematodes parasitize a wide variety of plants and animals, including human beings. A nematode, Meloidogyne incognitia, infects the roots of tobacco plants and causes a great reduction in yield. A noval strategy was adopted to prevent this infestation which was based on the process of RNA interference (RNAi). RNAi takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific mRNA due to a complementary dsRNA molecule that binds to and prevents translation of the mRNA (silencing). Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms (GMO). GM plants have been useful in many ways. Genetic modification has: (i) made crops more tolerant to abiotic stresses (cold, drought, salt, heat). (ii) reduced reliance on chemical pesticides (pest-resistant crops). (iii) helped to reduce post harvest losses. (iv) increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil). (v) enhanced nutritional value of food, e.g., golden rice, i.e., Vitamin 'A' enriched rice. Genetic modification of organisms can have unpredicatable results when such organisms are introduced into the ecosystem. Therefore, the Indian Government has set up organisations such as GEAC (Genetic Engineering Approval Committee), which will make decisions regarding the validity of GM research and the safety of introducing GM-organisms for public services. Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes).
Bacillus thuringiensis produces proteins that do not kill certain insects such as