robin082006
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true or false With regard to histones:
a. they are basic proteins
b. they are essential for the formation of stable DNA
c. mitochondria do not contain histones
d. in the chromosomes, the weight of the histones equal to that of the
DNA
e. the amino acid composition of histones show great variability
amongst different human races
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| drk1980
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taking some guesses, since no one else attempted...
a- true
b- true
c- true(unless circular DNA as seen in mitochondria requires histones as well)
d- false ??
e- not sure, maybe excluding arginine and lysine, there is variability in other amino acids.
please share the right answers with us...thanks for your efforts.
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| sturge_weber
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a, true
b. true
c. false
d. false
e.?????????
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| reet
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e-- false.
variability of histones H2A,H2B..doesnt have role in DNA chromatin variability--so think cant show variability in human races...
ur ideaz plz.........
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| robin082006
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reet is right, all are true except e
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| jvo_md
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Can someone explain number 2 plz?
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| reet
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histones are essential for STABLE dna..
HISTONESH2A,H2B,H3,H4 aggregate to form OCTAMER .histones are positively charged and DNA negatively charged,,So DNA is wound around the outside of octamer to form nucleosome..
also H1 histone between nucleosomes are found..--
CODENSATIONS EVENTUALLY FORMS chromosome.
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| reet
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NAME THE m RNA Which has no poly-A tail in POST TRANSCRIPTIONAL PRCOCESSING???
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| drk1980
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histone mrna?
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| reet
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