085-003 11543 Part A The genetic information is coded in DNA by the arrangement of the histones three-dimensional structure of the double helix sequence of the nucleotides regular alteration of sugar and phosphate molecules Questio
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Q. No. 5. An explorer discovers strange new species of plant and sends some of the plant tissue to geneticists to study: The geneticist isolates chromatin from the plant and examines it with an electron microscope: She observes what appeared to be beads on string: She then adds a small amount of nuclease, which cleaves the string into individual beads that each contain 280 base pair of DNA: After digestion with more nuclease, a 120 base pair fragment of DNA remains attached to a core of histone proteins. Analysis of the histone core reveals histones in the following proportions: HI 12.5% H2A 25% H2B 25% H3 0% H4 25% H7 (a new histone) 12.5% On the basis of these observations what conclusions could the geneticists make about the probable structure of the nucleosome in the chromatin of this plant?
Madhur L.
How does the sequence of a molecule of DNA, made up of many monomers of only four nucleotides, encode the enormous amount of genetic information stored in the chromosomes of living organisms?
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