Segmental duplications have played an important role in the evolution of human chromosomes; about 4% of the human genome consists of segmental duplications.

#Id: 2534

#Unit 13. Methods in Biology

Probe length for PCR – the longer the oligonucleotide, the less chance there is of it binding to sequences other than the desired target sequence under conditions of high stringency.

#Id: 2572

#Unit 7. System Physiology – Animal

Transcellular Pathway

Water and solutes can be transported through the cell membranes by passive diffusion or active transport.

Water and solutes can be transported through the cell membranes by passive diffusion or active transport.

#Id: 5271

#Unit 7. System Physiology – Animal

SA node has Prepotential or pacemaker potential which is the gradual potential rise from the resting membrane potential to threshold  ( -40 mV) & this occur spontaneously.

#Id: 3302

#Unit 6. System Physiology – Plant

In actively respiring mitochondria, 0.1% to as much as 4% of the O2 used in respiration forms •O2^2- — more than enough to have lethal effects unless the free radical is quickly disposed of.

#Id: 4014

#Unit 7. System Physiology – Animal

Membrane ion channels that play important roles in generation of the action potential:

T (transient) channels 

L (long-lasting) channels Voltage gated potassium ion channel