TLS Online TPP Program

#Id: 2127

#Unit 8. Inheritance Biology

if their positions are altered by an inversion, their expression may be altered, an outcome referred to as a position effect.

TLS Online TPP Program

#Id: 958

#Unit 5. Developmental Biology

Fast block to polyspermy 

Within 1–3 seconds after the binding of the first sperm, the membrane potential shifts from -70mV to about +20 mV

TLS Online TPP Program

#Id: 5058

#Unit 3. Fundamental Processes

Each DnaB–DnaC complex consists of six DnaC monomers bound to a hexamer of DnaB.

Note that the DnaB helicase cannot open double-stranded DNA; it can only unwind DNA that has already been opened, in this case by DnaA.

DnaB binding to single-stranded DNA is the signal to hydrolyze ATP and for release of DnaC.

TLS Online TPP Program

#Id: 1262

#Unit 7. System Physiology – Animal

The adrenal cortex secretes three classes of steroid hormones:

Glucocorticoids

Mineralocorticoids

Androgens

TLS Online TPP Program

#Id: 1134

#Unit 2. Cellular Organization

CDK- Cyclin in Yeast-

G1 cyclin gene - CLN3

G1/S phase cyclin genes - CLN1 and CLN2