TLS Online TPP Program

#Id: 6380

#Unit 2. Cellular Organization

OC are constitutive because repressor protein is unable to bind; this allows RNA polymerase to have unrestrained access to the promoter.  The Oc mutations are cis-acting/cis dominant, because they affect only the contiguous set of structural genes.

TLS Online TPP Program

#Id: 5417

#Unit 7. System Physiology – Animal

Protoplasmic astrocytes produce substances that are tropic to neurons, & they help maintain the appropriate concentration of ions & neurotransmitters by taking up K+ & neurotransmitters glutamate & γ-aminobutyrate (GABA)

TLS Online TPP Program

#Id: 4267

#Unit 12. Applied Biology

Trypsin is a serine protease that digest the extracellular protein or matrix protein so that cells get free.

TLS Online TPP Program

#Id: 9869

#Unit 6. System Physiology – Plant

UVR8 lacks a prosthetic chromophore

TLS Online TPP Program

#Id: 5438

#Unit 7. System Physiology – Animal

Voltage-gated sodium channel has two gates:

activation gate near the outside of the channel 

Inactivation gate near 

the inside of the channel