Practice Questions

TLS Online TPP Program

#Question id: 2022

Which one of the following is not true for class 1 MHC protein?

#Section 2: General Biology

Class-I MHC gene encodes glycoprotein molecule which expressed on the surface of all nucleated cells and platelets.
MHC-I molecule contains a 45KDa α-chain associated non-covalentely with a 12KDa β2 microglobulin molecule.
Association of α-chain and β2 microglobulin is required for expression of class-I MHC molecule on cell membrane.
Major function of MHC-I is to bind peptide antigen and present to CD4 T cells.

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TLS Online TPP Program

#Question id: 15874

#Section 6: Plant, Animal and Microbial Biotechnology

Callus culture show numerical chromosomal changes such as;

TLS Online TPP Program

#Question id: 15875

#Section 6: Plant, Animal and Microbial Biotechnology

Suspension cultures show both numerical and structural chromosomal changes such as;

TLS Online TPP Program

#Question id: 15876

#Section 6: Plant, Animal and Microbial Biotechnology

The following growth regulators (GRs)- auxins, cytokinins, ABA and GA3 are used in plant tissue culture, The common range of concentrations used are as follows:

GROWTH REGULATOR(GRs) CONCENTERATION

A) AUXIN i) 0.1-3 mg/L

B) GA3 ii) 0.2 mg/L

C) CYTOKININ iii) 0.1-1 mg/L

TLS Online TPP Program

#Question id: 15877

#Section 6: Plant, Animal and Microbial Biotechnology

Zinc as micronutrient is used in culture media for____

TLS Online TPP Program

#Question id: 15878

#Section 6: Plant, Animal and Microbial Biotechnology

A vitamin which has been found to inhibit callus formation and improve growth and quality of shoots.

TLS Online TPP Program

#Question id: 15879

#Section 6: Plant, Animal and Microbial Biotechnology

During which Phase lasts about 3-4 cell generations (the time taken for doubling of cell number), and the duration of a cell generation may vary from 22-48 hr, depending mainly on the plant species?