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TLS Online TPP Program

#Id: 9942

Diphtheria

Natural infection with C. diphtheriae occurs only in humans and is spread by respiratory droplets. 

The organism colonizes the nasopharyngeal tract and causes little tissue damage, with only a mild inflammatory reaction. 

#Unit 4. Cell Communication and Cell Signaling #Infectious Diseases #Part B Pointers
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TLS Online TPP Program

#Id: 7436

#Unit 5. Developmental Biology

The top of the mound continues to emit cAMP pulses and is pushed upwards by the movement of cells underneath
TLS Online TPP Program

#Id: 1263

#Unit 7. System Physiology – Animal

The innermost zone of the cortex, zona reticularis, and the middle zone, zona fasciculata, synthesize and secrete glucocorticoids and adrenal androgens. 
TLS Online TPP Program

#Id: 10185

#Unit 6. System Physiology – Plant

Ratio of GA:ABA affects early germination (vivipary). 
With high levels of ABA, seeds remain dormant.
TLS Online TPP Program

#Id: 3404

#Unit 3. Fundamental Processes

The LexA repressor is inactivated when it catalyzes its own cleavage at a specific Ala–Gly peptide bond.
TLS Online TPP Program

#Id: 2893

#Unit 3. Fundamental Processes

DnaA is in the active form only when bound to ATP.