- small segment of DNA → carries gene → that stores information used to make a single protein
- proteins → responsible for determining characteristics of org.
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Each DNA molecule → consists of 2 strands → twisted around each other to form a double helix (i.e. 2 long thin strands twisted around each other like a spiral staircase)
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Molecule of DNA is wrapped around proteins to form a single chromosome this is wrong this is chromatin thread. which then coils and condenses during cell division. refer to main note under rs of gene chromosome and DNA.
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Made up of 2 anti parallel polynucleotide chains twisted into a double helix. (chains run in opp. directions) ^7e422f
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Each Polynucleotide chain is made up of nucleotide → containing nitrogen containing base, deoxyribose sugar and phosphate group
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Bases on one chain are bonded to those on the opposite chain according to the rule of base pairing
- Appears as very thin white threads in purified form when extracted from nuclei of cells
Refer Heavily to: Relation Between DNA, Chromosomes, Genes → this gives you deeper insight to the structure of DNA. A summary will be found on the main note later.
Understanding
chromosome is a long stand of DNA wrapped around proteins nucleus contains chromosomes