LECTURE III Flashcards
CHECK ON LEARNING
this is the study of inheritance through the lens of structure and function of chromosomes?
cytogenics
name the purines?
adenine and guanine
name the pyrimidines?
cytosine, thymine, uridine
coiled solenoid (to protect genetic material as they go through mitosis or meiosis (contains proteins and DNA))
chromatin
each turn contains 6 nucleosomes and 1200 nucleotide pairs?
solenoid
DNA wound twice around an octane of histones (2 subunits each of H2A, H2B, H2, H4, plus an unconcerned H1 that anchors the DNA)
so as a result, this structure of interphase chromosome allows more/less access to the sequence for transcription, what is this called?
nucleosome
epigenetics
what form of double stranded DNA is this?
right-handed, 11bp/turn, crystal structure
A form
what form of double stranded DNA is this?
right-handed, 10bp/turn, most common form
B form
what form of double stranded DNA is this?
left-handed, 12 bp/turn. alternating CGCGCG
Z form
heterochromatin has DNA Methylation or DNA Demethylation?
DNA methylation
T/F, heterochromatin has high or low AT content?
high
Euchromatin is histone methylation or histone acetylation?
histone acetylation
Euchromatin or heterochromatin has high GC content?
Euchromatin
this has highly repetitive DNA that protects the chromosomal ends from degradation. Per each division, the tail shortens. Conversely lengthened by telomerase?
telomere
in producing a karyotype, the chemicals used stop mitosis in what phase?
metaphase