Biochemical pathways are straightforward. A gene is transcribed and translated into a protein that plays a catalytic role in a biochemical pathway.
Mitosis is the process by which a eukaryotic cell nucleus splits into two followed by the division of a parent cell into two daughter cells. Meiosis, on the other hand, is a type of cell division that is required to produce gametes.
At the size of a small SUV and weighing in at over 2,000 pounds, there was little that could stand in its path – or so we thought.
I knew he was marrying me for the money, the dowry. My only purpose in life, to be a good patni and beti. I tasted bitterness in my mouth. I was only as good as my dowry and I would follow it when it left.
In a recent paper published in the scientific journal, Cell, the Belmont lab at the Salk Institute were able to generate successful chimeric human-pig embryos. Potentially opening the door to research into generating human organs in animal hosts.
Large white forehead patches used to be a “sexy” trait in male collared flycatchers, but now they have become a major survival disadvantage.
But beyond the intricate story-telling and the mesmerizing near-death CGI scenes, I was pulled into the series for the same reason I was pulled into a career as a scientist. I needed to know the truth. Can scientists believe in an afterlife?
The lac operon has been covered in another post along with the possible scenarios you could encounter. But what happens to B-galactosidase expression, permease expression and trans-acetylase expression if you have an extrachromosomal F’ factor episome that carries another lac operon? Well, not to fear! I will guide you through a sample problem giving you a systemic method to solve these types of problems.
Complementation testing is done to determine whether two mutants contain a mutation in the same genes or different genes. In research, it is practical to have various mutants that have mutations on the same gene to study its role in the native system. But before one jumps into using these mutants to study a particular gene of interest, one must learn the basics of complementation testing.
In Escherichia coli, the lac operon allows for the transport and metabolism of lactose. Wild type (WT) E. coli prefers to use glucose as oppose to lactose as its energy source. Therefore, both negative and positive regulation occurs to insure that the lac operon remains tightly regulated and can be induced under appropriate conditions.