CellPart-II - DNA & Cell Division Nucleic Acids...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Nucleic Acids Polymers of monomers called nucleotides serves as blueprint for protein synthesis two types of nucleic acids DNA (deoxyribonucleic acid) contains all the inheritable genetic information (genes) RNA (ribonucleic acid)- involved in protein synthesis mRNA rRNA tRNA Nucleotide Each nucleotide has three parts sugar- ribose (5C sugar) or deoxyribose phosphate group- constant nitrogenous base- variable Complimentary Base Pairing Organization of Genetic Material DNA in the cell is thick and very long when compared to the size of the nucleus Perspective: if a DNA molecule was the thickness of a telephone pole, it would reach 2700 miles into space The cell has 46 DNA molecules that must fit into the nucleus organized and intact. Organization of Genetic Material Chromatin - longs strands of DNA in beaded like strands Nucleosome - DNA wrapped around a cluster of proteins called histones Non-histons protein- provide structural support for the chromatin and help regulate gene activity Nucleosome DNA Replication In Cell Division The reasons for cell division growth repair reproduction Two kinds of cell division somatic cell division- mitosis sex cell division- meiosis DNA Replication
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Replication begins at a Specific Sight on the Double Helix Mutations Any change in the nucleotide sequence of DNA Three major types of mutations alterations within a gene abnormal numbers of chromosomes
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

CellPart-II - DNA & Cell Division Nucleic Acids...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online