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cell life cycle


Cell life cycle the series of changes a cell goes through from the time it is formed until it divides
Interphase period in which the cell grows and carries on its ususal metabolic activities (metabolic phase)
Cell division time when the cell reproduces its self
stages of mitosis (PMAT)Prophase, metaphase,anaphase,telophase
Mitosis the formation of 2 daughter cells
Prophase as cell division begins, the chromatin treads coil and shorten so that visible barlike bodies called chromosomes appear
Metaphase in this short stage, chromasomes cluster and become alighned at the metaphase plate so that a straightline of chromasomes is seen
Anaphase the centromes that have held the chromatide together split. chromatides (now called chromosomes again) begin to move slowly apart, drawn toward opposie ends of the cell
Telophase essentially prophse in reverse. chromosomes at opposite ends uncoil to become thread like chromatin again, spindles break down and disappear a nuclear envelope forms around each chromatin mass, nucleoli appear in each daughter cell
Cytokinesis division of the cytoplasm, begins duringlate anaphase
cleavage furrow appears over the midline of the spindle and evetually squeezes or pinches the original cytoplasmic mass into two parts
binucleated/multinuceated cells in some cases the cytplasm does not divide, this condition leads to the formation of ________or______ cells (fairly common in the liver
DNA replication process the precise trigger for DNA synthesis is unknown. rhe process begins as DNA uncoils and gradually separates into its two nucleotides,the strands then serve as templates for building new nucleotides
Complimentry nucleotids Adenine bonds with tymine guanine bonds with cytosine
Protein synthesis/protien polypeptide DNA serve as the master bluprint for_________ __________ a gene is defined as a DNA segment that caries the information for building one____ or ______chain
Enzymes biological catalysts that reulate chemical reations in the cell
rRNA (ribosomal RNA) help form the ribosomes where proteins are built
tRNA (transfer RNA) help transfer amino acids from outside the nucleus into the nucleus
mRNA (messenger RNA) carry the instructions for protein synthesis
RNA ribonucleic acid , functions as messenger and decoder for specify the structure of proteins to be built at the ribosomes
Amino acids buildingblocks of proteins that are joined during protein synthesis (examples phenylalanine and glycine
Triplet code three-base sequence specifying a particular amino acid on the DNA gene
Codons coresponding 3 base sequences on mRNA to triplet code on DNA
Anticodon recognize the mRNA codon "calling for" the amino acid they are toting they can do this because they have a special three base sequence called a _________ on their "head" that can bind to the complimentary codons
Ttranscription involes the transfer of information from DNA's base sequence into the compimentary base sequence of mRNA
Translation protein synthesis, the language of nucleic acids(base sequence)is changed to the language of proteins(amino acid sequence)
Created by: crackl