TLS Online TPP Program

#Id: 6330

#Unit 8. Inheritance Biology

Pseudoautosomal 

Region Small region of the X and Y chromosomes that contains homologous gene sequences.

TLS Online TPP Program

#Id: 9875

#Unit 4. Cell Communication and Cell Signaling

The main physical barriers—the body’s first line of defense—are the epithelial layers of the skin and of the mucosal and glandular tissue surfaces connected to the body’s openings

TLS Online TPP Program

#Id: 7132

#Unit 6. System Physiology – Plant

Long-distance transport of three hormones that regulate shoot branching: auxins, cytokinins, and strigolactones. Auxin is produced primarily in young expanding leaves and is transported basipetally by PIN1- mediated polar auxin transport. 

TLS Online TPP Program

#Id: 6026

#Unit 3. Fundamental Processes

Pol a/primase enzyme binds to the initiation complex at the origin and synthesizes a short strand consisting of 10 bases of RNA followed by 20 to 30 bases of DNA called as iDNA. 

It is then replaced by an enzyme that will extend the chain.  On the leading strand, this is DNA polymerase E; on the lagging strand this is DNA polymerase d. This event is called the polymerase switch.

TLS Online TPP Program

#Id: 5733

#Unit 10. Ecological Principles

Natural Enemies Promote Increased Species Richness at Local Levels

Natural enemy's hypothesis supposes the action of natural enemies reduces prey density.

Natural enemies – Predator, parasite