MCBG random Flashcards
which amino acids have an aromatic side chain
tyrosine
tryptophan
phenylalanine
state the stages of the cell cycle
G0 G1 S G2 M
what happens in cell cycle stage G0
cell cycle arrest.
- stage where a cell does not prepare to divide or is dividing,
- temporary stage or final stage for nerve cells/ heart muscle.
what happens in cell cycle stage G1
all cellular contents excluding the chromosomes are duplicated.
- at the restriction point, the cell is committed to division and moves into S phase
what happens in cell cycle stage S
DNA is replicated. consists of two sister chromatids.
- essential to ensure cells have same chromosome number
-
what happens in cell cycle stage G2
DNA is double checked for errors and DNA repair takes place
what happens in cell cycle stage M
Nuclear division (mitosis) followed by cellular division (cytokinesis)
what is heterochromatin?
Densely packed DNA
-stains darkly on an electron micrograph.
Heterochromatin is inaccessible to transcription factors > mostly transcriptionally silent
what is euchromatin?
Euchromatin is less condensed than heterochromatin - does not stain darkly on an electron micrograph.
more accessible to transcription factors than heterochromatin >transcriptionally active
what’s the effect of a competitive inhibitor on enzyme
Inc Km.
what’s the effect of a non-competitive inhibitor on enzyme
Dec Vmax
as it decreases the number of enzymes that are able to bind to substrate
which primers have the highest melting temperature?
one with the greatest proportion of GC as more H bonds.
BMI calculation
kg/m^2
