The part of an antibody that recognizes the anti-genic determinant is called a paratope. Thus, this option is correct.

The thymus and the bone marrow constitute the primary lymphoid tissues involved in the production and early selection of lymphocyte tissues. Thymus: Site of T Cell maturation Bone Marrow: Site of Haematopoiesis and B Cell maturation

Activin is a protein complex which enhances FSH biosynthesis and secretion, and participates in the regulation of the menstrual cycle.

Both are incorrect statements. 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 eukaryotes, there is a set of positively charged, basic proteins called histones. Histones are rich in the basic amino acid residues lysines and arginines. In a typical nucleus, some region of chromatin are loosely packed (and stains light) and are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin.

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.

The phi X 174 bacteriophage was the first DNA-based genome to be sequenced. This work was completed by Fred Sanger and his team in 1977.

About 8% of the human genome consists of repetitive DNA sequences, termed as tandem repeats or tandem DNA arrays. The human reference genome (HRG) is a haploid sequence. Each chromosome is represented once.

M13 is a filamentous bacteriophage composed of circular single stranded DNA (ssDNA). Filamentous bacteriophage fd is a type of filamentous bacteriophage known to infect Escherichia coli. Bacteriophage f1 is structurally classified as a class I filamentous phage.

In eukaryotes, there are at least three RNA polymerases in the nucleus (in addition to the RNA polymerase found in the organelles). There is a clear cut division of labour. The RNA polymerase I or Pol I transcribes ribosomal RNAs (28S, 18S, and 5.8S), whereas the RNA polymerase III or Pol III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs). The RNA polymerase II or RNAP II and Pol II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).

The two chains have anti-parallel polarity. It means, if one chain has the polarity 5'→3', the other has 3'→5'. The two chains are coiled in a right-handed fashion. The pitch of the helix is 3.4 nm and there are roughly 10 bp in each turn. Consequently, the distance between a bp in a helix is approximately equal to 0.34 nm.

BioOne bibliographic database is an indexed and fully-searchable collection of abstracts that link to the fulltext articles available from the BioOne organization. Embase is a biomedical and pharmacological database containing bibliographic records with citations, abstracts and indexing derived from biomedical articles in peer reviewed journals and is especially strong in its coverage of drug and pharmaceutical research.

The International Nucleotide Sequence Database Collaboration (INSDC) is a joint effort to collect and disseminate databases containing DNA and RNA sequences. It consists of the following databases: DNA Data Bank of Japan (Japan), GenBank (USA) and the European Nucleotide Archive (UK).

The southern blotting technique is a laboratory method used to detect specific DNA molecules from many other DNA molecules. The southern blotting technique depends on similarities between the sequences of probe DNA and experimental DNA.

DNA Data Bank of Japan (DDBJ) is a nucleotide sequence database. It is a biological database that collects DNA sequences. MEDLINE is a bibliographic database of life sciences and biomedical information which provides bibliographic information for articles from academic journals covering medicine, nursing, pharmacy, dentistry, veterinary medicine and health care. NatureServe is a sophisticated biodiversity database which acts as an authoritative source for information on more thant 70,000 plants, animals, and ecosystems of the United States and Canada. WormBase is an online biological database about the biology and genome of the model organism Caenorhabditis elegans (a nematode) and contains information about other related nematodes.