Pre-Lab Activities A. ORGANIZATION OF GENETIC MATERIAL 1....

Pre-Lab Activities A. ORGANIZATION OF GENETIC MATERIAL 1. Identify the DNA structures listed in the text box Deoxyribose phosphate adenine guanine cytosine thymine hydrogen bond nucleotide 2. Identify the chromatin structures listed in the text box Chromatin chromosome DNA double helix nucleosome nucleotide 30 nm fiber 300 nm fiber

Transcript

00:01 The genetic material, the genetic material which is found in an eukaryotic cell is not just made up of the dna which in turn denotes reoxyribone nucleic acid but is also complex with certain sets of protein.

00:14 So it is a combination of both dna and also these proteins.

00:19 And the nature of this particular protein is in turn found to be basic in nature and this basic proteins are referred to be as histones.

00:27 And there are five types of histones that can be seen.

00:30 Namely h1 followed by h2a followed by h2b and then hh3 followed by h4l.

00:39 So it should be noted that these four in turn would be found in two copies in order to form an octoma and then this hn1 h1 intern would act as a linker stone joint that is being present between two ellipsoidal beads which in turn would be the octoma that is wrapped with a dna molecule.

00:58 So this is the structure that is associated with it and the ratios in which these four, five types of histones are present are namely.

01:06 It is in the order of the one that is mentioned here that is 1st, 2 is to 2 is to 2.

01:13 So this is the order in which these histone molecules are present based on h1, h2a, h2b, h3 and h4 respectively.

01:20 And it should be noted that histones are referred to be basic because of the presence of these amino acids.

01:26 Namely the first one shall be the arginine and then the second one shall be the lysin.

01:30 These are positively charged amino acids...

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