Developmental changes by light (photomorphogenesis) transformation from the etiolated to the green state.

a. A decrease in the rate of stem elongation

b. The beginning of apical-hook straightening

c. The initiation of the synthesis of pigments

TLS Online TPP Program

#Id: 724

#Unit 3. Fundamental Processes

Activity of the replication origin is controlled is DNA methylation

TLS Online TPP Program

#Id: 2528

#Unit 13. Methods in Biology

The duration of annealing step is usually 1 min during the first as well as the subsequent cycles of PCR. 

TLS Online TPP Program

#Id: 1596

#Unit 5. Developmental Biology

The axis of the primitive streak is equivalent to the dorsal-ventral axis of amphibians.

TLS Online TPP Program

#Id: 5273

#Unit 7. System Physiology – Animal

Between heartbeats, influx of positively charged sodium ions causes a slow rise in the resting membrane potential in the positive direction. 

TLS Online TPP Program

#Id: 5286

#Unit 7. System Physiology – Animal

When the cholinergic vagal fibers to nodal tissue are stimulated, the membrane becomes hyperpolarized and the slope of the prepotentials is decreased