TLS Online TPP Program

#Id: 461

#Unit 2. Cellular Organization

Parity rules were given by Erwin Chargaff

I. Rule of complementarity 

II. Rule of Equal amount applies more closely to introns than to exons

III. Cluster rule – Purines in nontemplate strand applies more closely to Exons

TLS Online TPP Program

#Id: 8100

#Unit 1. Molecules and their Interaction Relevant to Biology

Sphingolipids contain a single fatty acid, in amide linkage to the sphingosine backbone.

TLS Online TPP Program

#Id: 377

#Unit 2. Cellular Organization

For negatively supercoiled circle W < 0 

For a positively coiled superhelix W > 0.

 

TLS Online TPP Program

#Id: 3685

#Unit 2. Cellular Organization

The “introns late” hypothesis is the proposal that the ancestral protein-coding sequences were uninterrupted and that introns were subsequently inserted into them

TLS Online TPP Program

#Id: 4705

#Unit 11. Evolution and Behavior

Reciprocal altruism

Cases of altruism are known to exist between unrelated individuals. What drives this phenomenon is a “You scratch my back, I’ll scratch yours” behavior called reciprocal altruism.