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Janice Yang

on 4 March 2013

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Transcript of Bio-Mitosis

By Vishnu Kumar, Janice Yang, and Medha Achar 2.5.3 & 2.5.6 Protein Synthesis Occurs in the G1 and G2 phase of interphase
Also called translation
DNA turns into mRNA which makes protein with the help of tRNA and ribosomes
The mRNA binds to the ribosome and then after translation, proteins are formed
Ribosomes are the main organelle that synthesizes proteins DNA Replication Occurs in the S phase during interphase
Mass of DNA in cell doubles
Most of the times, damage done to DNA is fixed
Sometimes mutations can occur in DNA leading to disabilities
Mutations can be inherited or acquired from environmental factors
DNA repair weakens as people age The G2 stage of interphase involved the replication of mitochondria and chloroplasts
Mitochondria in the case of humans/chloroplast in the case of plants
Both of them are generated to create ATP and are used in oxidative phosphorylation.
Increase in the number of chloroplast/ mitochondria in order to prepare for cell division in mitosis Mitosis in Growth During all of mitosis primarily the G1 and G2 phases
Occurs during S phase as well
Duplication is growth
For the function of the cell, large surface area and small volume Mitosis in Embryonic Development Mitosis is involved in embryonic development when the fertilized egg (zygote) needs to divide in order to begin the process of creating the multicellular organism
Throughout the early stages of the development of the embryo, process of mitosis is needed for growth
Each cell is reproduced to be genetically identical
Process of differentiation
only certain genes within the cells show in order to specialize (ex: muscle cells, nerve cells) Mitosis in Tissue Repair Mitosis in Asexual Reproduction Mitosis occurs during asexual reproduction when offspring are created from a single parent cell
Unlike the products of sexual reproduction, the offspring are genetically identical to each other as well as the parent cell
Each daughter cell receives an exact copy of the chromosomes of the original cell (clones). Interphase
Metabolic Reactions Increase in Number of Mitochondria and or Choloroplasts 2.5.6: State that growth, embryonic development, tissue repair and asexual reproduction involve mitosis. 2.5.3 State that interphase is an active period in the life of a cell when many metabolic reactions occur, including protein synthesis, DNA replication and an increase in the number of mitochondria and/or chloroplasts mitosis is the process where cells divide and produce cells as well as repair and replace damaged cells
Identical cells produced in mitosis replace damaged cells which end up repairing the tissue
i.e. cuts and scabs Activity Chromosomal Mutations Mutations occur during the DNA replication phase when chromosomes are replicated or deleted
Slight changes such as a little extra or a missing part can cause damage
(Mainly during reproduction) Average Quiz Time! 1. T/F Interphase is part of mitosis (cell division.

4.Throughout the early stages of the development of the embryo, process of mitosis is needed for growth (genes etc.) 2. When does DNA replication occur? 3. What is duplicated during interphase? 4. If mitosis is asexual reproduction, how is it involved in embryonic growth? 1. False 2. During the S phase of interphase 3. DNA, mitochondria, and chloroplasts Works Cited http//www.youtube.com/watch?v=dpvb1ZlCfW8&list=PLD84FB4ECF83A6062
http://2.bp.blogspot.com/-S2Q1ez9c2Kk/TbJdJUL5BJI/AAAAAAAAALQ/yql4HyJIt0Q/s1600/karyotype-down-syndrome.jpg Down's Syndrome
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