Activin is a protein complex which enhances Follicle-stimulating hormone biosynthesis and secretion, and participates in the regulation of the menstrual cycle. Many other functions have been found to be exerted by activin, including roles in cell proliferation, differentiation, apoptosis, metabolism, homeostasis, immune response, wound repair and endocrine function.

An epitope, also known as antigenic determinant, is the part of an antigen that is recognised by the immune system, specifically by antibodies, B cells, or T cells. The part of an antibody that recognises the epitope is called a paratope.

Enzyme immobilisation may be defined as confining the enzyme molecules to a distinct phase from the one in which the substrates and the products are present.

This option is correct because Hybridoma technology is a technology of forming hybrid cell lines by fusing an antibody-producing B cell with a myeloma (B cell cancer) cell that is selected for its ability to grow in tissue culture and for an absence of antibody chain synthesis and revealing intra-specific variation and diversity between species is a Random Amplified Polymorphic DNA (RAPD).

Classification Determinant-8 is a transmembrane glycoprotein present in Regulatory T cell.

A microRNA (miRNA) is a small non-coding RNA molecule found in plants, animals and some viruses, which functions in transcriptional and post-transcriptional regulation of gene expression.

This option is correct because Peyer's patches, mucosa-associated lymphoid tissue and adenoids are peripheral lymphoid organs.

This option is correct because apoptosis is the process of programmed cell death that may occur in multicellular organisms where biochemical events lead to characteristic changes in morphology of cell and death. These changes include blebbing, cell shrinkage, nuclear fragmentation, chromatin condensation and chromosomal DNA fragmentation. Anoikis is a form of programmed cell death which is induced by anchorage-dependent cells detaching from the surrounding extracellular matrix.

Hemophilia is a sex-linked recessive disease, which shows its transmission from an unaffected carrier female to some of the male progeny.

Lectins are carbohydrate-binding protein macromolecules that are highly specific for sugar moieties.

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.

This option is correct because in capping, methyl guanosine triphosphate is added to the 5'-end of hnRNA. In tailing, adenylate residues are added at 3'-end in a template independent manner. It is the fully processed hnRNA, now called mRNA, that is transported out of the nucleus for translation.

In koji process, for the fermentation to produce citric acid, Aspergillus niger is used with solid substrate as Ipomoea batatas.

This option is correct because all are correctly matched. Polymerase chain reaction - Gene amplification Tumour inducing plasmid - Introducing foreign genes into plants Bromine cyanide - Breaking bond between insulin and galactosidase Hybridoma technology - Monoclonal antibody production

Glyoxylic acid reaction is for identification of tryptan. Edman degradation can be used to determine the amino acid sequence of a protein. Millon's reagent is for identification of 4-hydroxyphenylalanine. Aromatic amino acids can be detected by Xanthoproteic reaction.