Actin,

basic building block of microfilaments extraordinarily well conserved among eukaryotes.

TLS Online TPP Program

#Id: 5894

#Unit 3. Fundamental Processes

When a nucleotide binds, the fingers domain rotates 60° toward the palm, with the tops of the fingers moving by 30 Å. The thumb domain also rotates toward the palm by 8°. 

These changes are cyclical:

They are reversed when the nucleotide is incorporated into the DNA chain, which then translocates through the enzyme to recreate an empty site.

TLS Online TPP Program

#Id: 1679

#Unit 4. Cell Communication and Cell Signaling

Junctional diversity- P and N nucleotides  addition

TLS Online TPP Program

#Id: 181

#Unit 5. Developmental Biology

Genetic specificity of induction:

mesenchyme may instruct the epithelium as to what sets of genes to activate, the responding epithelium can comply with these instructions only so far as its genome permits.

TLS Online TPP Program

#Id: 9789

#Unit 6. System Physiology – Plant

There is two kind of photo response

1. Red/Far-red 

2. Blue Light

TLS Online TPP Program

#Id: 598

#Unit 2. Cellular Organization

Like the Lambda repressor, the cII protein is a transcriptional activator. It binds to a site upstream of a promoter called PRE (for repressor establishment) and stimulates transcription of the cI (repressor) gene from that promoter.