Which one of the following is a correct statement about dormancy?

Identify the correct statement for the species diversity.

Which of the following biofertilisers are free living in the soil?
(A) Anabaena
(B) Azospirillum
(C) Rhizobium
(D) Azotobacter
Choose the correct answer from the options given below :

Read the following passage carefully and answer the given questions.
Restriction endonuclease on finding its specific recognition sequence, bind to the DNA and cut each of the two strands of the double helix at specific points in their sugar -phosphate backbones. Each restriction endonuclease recognises a specific palindromic nucleotide sequences in the DNA. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. This can be achieved by treating the bacterial cells/plant or animal tissue with enzymes such as lysozyme (bacteria), cellulase (plant cells), chitinase (fungus). Now a days the most commonly used matrix is agarose which is a natural polymer extracted from sea weeds. The DNA fragments separate (resolve) according to their size through sieving effect provided by the agarose gel. The first restriction endonuclease-Hind II, whose functioning depended on a specific DNA nucleotide sequence was isolated and characterised five years later. It was found that Hind II always cut DNA molecules at a particular point by recognising a specific sequence of six base pairs. In addition to 'ori', the vector requires a selectable marker, which helps in identifying and eliminating non-transformants and selectively permitting the growth of the transformants. Transformation is a procedure through which a piece of DNA is introduced in a host bacterium. Normally, the genes encoding resistance to antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin, etc., are considered useful selectable markers for E. coli
Chitinase is used to disrupt the membranes of:

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

Which techniques are commonly used for early diagnosis of a disease.
(A) Serum analysis
(B) ELISA
(C) PCR
(D) Recombinant DNA technology
Choose the correct answer from the options given below:

Read the following passage carefully and answer the given questions.
Biofertilisers
Biofertilisers are organisms that enrich the nutrient quality of the soil and their main sources are bacteria, fungi and cyanobacteria. You have studied about the nodules on the roots of leguminous plants formed by the symbiotic association of Rhizobium. These bacteria can fix atmospheric nitrogen into organic forms. Other bacteria can also fix atmospheric nitrogen while free-living in the soil (examples Azospirillum and Azotobacter). Fungi are also known to form symbiotic associations with plants (mycorrhiza). Many members of the genus Glomus form mycorrhiza. Plants having such associations show other benefits also, such as resistance to root-borne pathogens, tolerance to salinity and drought, and an overall increase in plant growth and development. Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen, e.g. Anabaena, Nostoc, Oscillatoria, etc. In paddy fields, cyanobacteria serve as an important biofertiliser. Blue green algae also add organic matter in to the soil and increase its fertility. Currently, in our country, a number of biofertilisers are available commercially in the market and farmers use these regularly in their fields to replenish soil nutrients and to reduce dependence on chemical fertilisers.
In organic farming, there is -

C, Si and Ge have the same lattice structure but C is an insulator while Si and Ge are intrinsic semiconductors because
(A) ionisation energy will be least for C, followed by Si and highest for Ge
(B) ionisation energy will be least for Ge, followed by Si and highest for C
(C) number of free electrons for conduction in Ge and Si are negligibly small but significant for C
(D) number of free electrons for conduction in Ge and Si are significant but negligibly small for C
Choose the correct answer from the options given below:

Secretions of which one of the following structures does not help in maturation and motility of sperms?

To obtain a n-type silicon semiconductor, it must be doped with

The waves used by artifical satellite for communication purposes are

Which of the following does not represent a correct application of the coordination compound?

If \(f: R \rightarrow R\) is defined by f(x) = sin x + x then f(f(x)) is: