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TLS Online TPP Program

#Question id: 2100

Cholesterol, bile acids, ergosterol, and stigmasterol share all the following common structural features except

#XL - S Microbiology

  1. a four-ring structure.

  2. a hydroxyl group on first ring.

  3. a carboxylic acid group.

  4. a multiple carbon chain extending off the ring structure.

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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.
TLS Online TPP Program

#Question id: 15562

#XL - S Microbiology

Deletion of which gene not only was accompanied by the abolition of antibiotic formation but also severely impaired growth on agar media.