The ratio of energy of the electron in ground state of hydrogen to the electron in first excited state of Be⁺³ is

TLS Online TPP Program

#Question id: 15525

#XL - S Microbiology

In the instructive model, TCR/CD4 and TCR/CD8 coengagement generates unique signals, if a thymocyte randomly generated a TCR with an affinity for MHC Class I. which thymocyte would bind with MHC class I?

TLS Online TPP Program

#Question id: 15527

#XL - S Microbiology

CD4 and CD8 T cells leave the thymus and enter the circulation as resting cells in which stage of the cell cycle?

TLS Online TPP Program

#Question id: 15528

#XL - S Microbiology

The B7 family of protein interact  with distinct receptor present on the T-cells, 

TLS Online TPP Program

#Question id: 15559

#XL - S Microbiology

The majority of the antibiotics have been isolated from 

TLS Online TPP Program

#Question id: 15560

#XL - S Microbiology

Nearly all of the genetic improvements to industrially important antibiotic-producing strains have been achieved by the use of 

TLS Online TPP Program

#Question id: 15561

#XL - S Microbiology

Which mechanism is helpful in secondary metabolite production

1. ppGpp secretion

2. Autoinducer

3. Nutrient limitation

4. Senescence genes

Which combination is incorrect  from the following.