Humoral immunity is mediated by
cytotoxic T-cell
plasma cell
eosinophil
neutrophil
B.
plasma cell
Humoral refers to the non-cellular components of blood, such as plasma (these synthesize antibodies) and lymphatic fluid. The humoral immune response denotes immunologic responses that are mediated by antibodies.
Melting of DNA at an elevated temperature (70°C) is primarily due to the breakdown of
phosphodiester bonds
glycosidic bonds
disulphide bonds
hydrogen bonds
In spermatogenesis, reduction division of chromosome occurs during conversion of
spermatogonia to primary spermatocytes
primary spermatocytes to secondary spermatocytes
secondary spermatocytes to spermatids
spermatids to sperms
The expanded name of MRI is
Medical Reserach Instrument
Magnetic Resonance Imaging
Magnetic Research Institute
Medical Resonance Imaging
The usual source of restriction endonucleases used in gene cloning is from
fungi
bacteria
plants
viruses
The important gas which was absent during the formation of Earth is
oxygen
hydrogen
nitrogen
carbon dioxide
Which one of the following is not included under in situ conservation?
National park
Wild life sanctuary
Zoological garden
Biosphere reserve
The carcinoma, a type of cancer, originates from
blood
connective tissue
epithelial tissue
lymph gland
For a clean environment, which one following is not essential?
Producer
Consumer
Decomposer
Polluter
