Two transesterification reactions takes place for 2 exon -1 intron configuration. First transesterification is catalysed variably either by external G or branch point while second transesterification is always caused by exon 1 -3’OH.

TLS Online TPP Program

#Id: 943

#Unit 5. Developmental Biology

Chemotaxis 

sperms are attracted toward eggs of their species by following a gradient of a chemical secreted by the egg.

TLS Online TPP Program

#Id: 7465

#Unit 5. Developmental Biology

Secreted GABA then acts on prestalk cells to induce the cell-surface exposure of the serine protease domain of the ABC transporter TagC.

TLS Online TPP Program

#Id: 4782

#Unit 5. Developmental Biology

ABa gives rise to neurons, hypodermis, & anterior pharynx cells ABp makes only neurons and hypodermal cells

TLS Online TPP Program

#Id: 6996

#Unit 5. Developmental Biology

Adult stem cell (tissue specific stem cells) produce a limited set of specialized cells that are characteristic of a particular tissue. These cells plays a vital role in tissue repair due to injury or disease.

TLS Online TPP Program

#Id: 9151

#Unit 11. Evolution and Behavior