Which structure in the microsporangium provides nourishment to pollen grains?

Read the following passage carefully and answer the given questions.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. They have been shown to have no negative impacts on plants, mammals, birds, fish or even on non-target insects. BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria. The sewage water is treated till the BOD is reduced. Cheese, is one of the oldest food items in which microbes were used. Different varieties of cheese are known by their characteristic texture, flavour and taste. For example, the large holes in ‘Swiss cheese’ are due to production of a large amount of CO₂ by a bacterium named Propionibacterium sharmanii.
Bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus

The gynoecium represents the female reproductive part of the flower. When gynoecium is having more than one pistils and the pistils are fused together, the condition is called:

Identify the salient features of the genetic code.
A. 60 codons code for amino acids and 4 codons do not code for any amino acids.
B. It is unambiguous and specific
C. The code is degenerate
D. UUU is not a universal code.
Choose the correct answer from the options given below:

DNA recombinant technology involves the use of restriction endonucleases. After having cloned the gene of interest and having optimised the conditions to induce the expression of the target protein, one has to consider producing it on a large scale. The cells harbouring cloned genes of interest may be grown on a small scale in the laboratory. In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. In Biolistics or gene gun method cells are bombarded with high velocity micro particles of gold or tungsten coated with DNA. The ligation of alien DNA is carried out at a restriction site present in one of the two antibiotic resistance genes. For example, you can ligate a foreign DNA at the BamH I site of tetracycline resistance gene in the vector pBR322. 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. The RNA can be removed by treatment with ribonuclease whereas proteins can be removed by treatment with protease. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol.
Which one of the following enzymes works as molecular glue?

Which of the following statements are incorrect?
(A) In bacteria, Bt toxin exists as inactive protoxin
(B) Due to alkaline pH in the gut, the toxin is converted into its active form
(C) The toxin is already present in active form in bacteria
(D) The inactive toxin binds to the surface of midgut and causes cell swelling and lysis.
Choose the correct answer from the options given below :

Match List-l with List-ll

List-l (Techniques)	List-II (Features)
(A) Bioprocess engineering	(I) Use of bio resources without proper authorisation
(B) Somatic hybridisation	(II) Correction of gene defect
(C) Gene therapy	(III) Fusion of protoplasts from two different organisms
(D) Biopiracy	(IV) Maintenance of sterile ambiance for microbial growth

Choose the correct answer from the options given below:

Match List-I with List-II

LIST - I (Statement)	LIST - II (Energy band diagram)
(A) An intrinsic semiconductor at \(T =0 K\)	(I)
(B) An intrinsic semiconductor at \(T >0 K\) with thermally generated electron-hole pairs.	(II)
(C) Energy bands of n-type semiconductor at \(T >0 K\)	(III)
(D) Energy bands of p -type semiconductor at \(T >0 K\)	(IV)

Choose the correct answer from the options given below:

If \(A=\left[\begin{array}{ll}2 & 3 \\ 1 & 4\end{array}\right]\) and \(B=\left[\begin{array}{cc}1 & -2 \\ 1 & 3\end{array}\right]\), then which of the following are incorrect?
(A) \(|A|=5\)
(B) \(\operatorname{Adj} A=\left[\begin{array}{ll}4 & 3 \\ 1 & 2\end{array}\right]\)
(C) \(A(\operatorname{Adj} A)=25 I\)
(D) \(|3 B|=45\)
(E) \((A B)^{-1}=B^{-1} A^{-1}\)
Choose the correct answer from the options given below:

If \(A\) is non-singular square matrix of order 3 and \(\left|A^{-1}\right|=24\), then the value of \(|2 A(\operatorname{adj}(3 A))|\), is

In the hydrogen atom, an electron revolves around the nucleus in a circular orbit of radius \( 5.11 \times 10^{-11} \text{ m} \) with a frequency of \( 6.8 \times 10^{15} \text{ Hz} \). The magnetic field at the centre of the orbit is :

Which is correct about amensalism?

Lichens are an example of -