Posts tagged nerdy
Posts tagged nerdy
MALDI-TOF is a method for determining the molecular mass of proteins.
When a lambda phage infects a bacteria, it can either enter into the lytic cycle or the lysogenic cycle. In the lytic cycle, the host cell’s machinery is hijacked to only reproduce the phage DNA until enough baby phages can assemble and burst out of the cell to wreak havoc on nearby cells. In the lysogenic cycle, the phage DNA is incorporated into the host cell DNA and is copied quietly alongside it as the cell reproduces. Eventually, through some environmental trigger, this dormant phage DNA in the lysogenic cycle enters the lytic cycle and proceeds as described above.
Hydrogen bonding between a hydrogen and an oxygen in water is fleeting.
Sadly, I’m obligated to tell you that this is not how a cell attached proteins on the outside of its cell membrane. But wouldn’t it be super cool??
This Tarzan problem was actually illustrated in a diagram in my physics book…complete with jungle print loincloths.
(That’s a leopard at the bottom)
Honeybees have haplodiploid sex determination. In humans, an X chromosome and a Y chromosome means that you’ll be a male (typically). Two X chromosomes will be a female. But bees do things differently; the queen bee will lay a ton of eggs, and these unfertilized eggs will each have one sex chromosome. If a male worker bee fertilizes an egg, it will develop into a female bee. Otherwise, the unfertilized eggs develop into males. Thus female bees have two sets of sex chromosomes (we term them ‘diploids’) and male bees only have one set of sex chromosomes (haploids).
To stop grand mal seizures from travelling from one hemisphere of the brain to the other, surgeons sometimes remove the corpus callosum, the white matter that connects (and separates) the two hemispheres.
In more mathematical/formulaic terms, Apoenzyme + Cofactor = Holoenzyme
The derivation of the quotient rule feels like a descent into Hell…
This is what I think of when HIV infects a cell