A regional thickening of cells at the anterior end of the primitive streak

TLS Online TPP Program

#Id: 373

#Unit 2. Cellular Organization

Conversely, if Lk >Lk0  and DLk >0 means positive, then the DNA is “positively supercoiled.”

TLS Online TPP Program

#Id: 3852

#Unit 5. Developmental Biology

Adenylate cyclase B (ACB) is normally expressed in prestalk cells, but is upregulated in the prespore region of acg null structures.

TLS Online TPP Program

#Id: 648

#Unit 3. Fundamental Processes

1 roentgen unit is a quantity of X ray that produces 2.083X109 ion pairs in one cubic centimeter of air at 0C and a pressure of 760 mm of mercury.

TLS Online TPP Program

#Id: 5188

#Unit 7. System Physiology – Animal

The initial reaction in the intrinsic system is conversion of inactive factor XII to active factor XII (XIIa).

TLS Online TPP Program

#Id: 2465

#Unit 13. Methods in Biology

Medium - (buffer/liquid) - with a precise pH value and a constant ionic strength.