nicked circle (Science: molecular biology) During extraction of plasmid dNA from the bacterial cell, onestrand of the DNA becomes nicked. This relaxes the torsional strain needed to maintain supercoiling, producing the familiar form of plasmid...
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..
ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..
