As evidence, he noted several instances of the appearance of animals from environments previously devoid of such animals, such as the seemingly sudden appearance of fish in a new puddle of water.

TLS Online TPP Program

#Id: 8463

#Unit 1. Molecules and their Interaction Relevant to Biology

Interactions between amino acid residues at the ends of the helical segment and the electric dipole inherent to the  helix.

TLS Online TPP Program

#Id: 8071

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphorylation is the most common type of regulatory modification.

TLS Online TPP Program

#Id: 6780

#Unit 3. Fundamental Processes

The mechanism of spacer sequence acquisition is as 

Each new spacer sequence is inserted next to the leader sequence, with the consequence that the array is a temporal record of acquisitions past. The sequence destined to become spacer is, within the phage genome, known as a “proto-spacer” and lies adjacent to a PAM sequence

TLS Online TPP Program

#Id: 464

#Unit 2. Cellular Organization

Introns are nucleotide sequence which cannot encode functional proteins or polypeptides or introns do not have a sequence-specific function.

TLS Online TPP Program

#Id: 6899

#Unit 3. Fundamental Processes

5-hydroxymethylcytosine (5hmC) is now novel epigenetic marks. The “teneleven translocation 1-3” or Tet1-3 proteinsare DNA TET hydroxylase enzymes that can convert 5mC to 5hmC, and can further convert 5hmC to 5-formylcytosine (5fC) and then 5- carboxylcytosine (5caC) in successive reactions.