Bimestre 4 Flashcards
DNA
Cytosine.
Guanine
Adenine
Thymine
RNA
Cytosine
Guanine
Adenine
Uracril
Proteins
Chains of smaller units (amino acids) Linked together in specific sequences
Important roles of Proteína
SETISM
Structural support (to cells and tissues)
Enzymes: act like it, moléculas that catalyze (speed up) chemical reacción in the body
Transporte
Immune función
Signaling
Muscke contraction
Process im which a cell splits in two genetically idénticas copies
Mitosis
Sex cells (germ) involved in cell división
Meiosis
Celular reproducción
They reproduce so that we may grow and regenerate
Mitosis vs meiosis
Mito:
-happens in somático cells
Produces 2 diploid daughter cells
Meiosis:
Happens in germ cells
Produces 4 haploid daughter cells
Same: Produces New cells, start with a single parent cell
Mitosis vs Meiosis
Purpose
Mitosis: proliferación as species. Grow and repair/ regenerate damaged tissue
Meiosis: create gametos, prepare for sex reproducción
Create genetic diversity
Outcome of mitosis and meiosis
Mitosis: 2 diploid cells idénticas genetic información (46 chromosomes)
Meoosis: 4 haploid cell with different genetic info, 23 cromosomas
First described by?
Mitosis: Walther Flemming 1882 “Cell substance, nucleus and cell division”
Meiosis: Oskar Herwig 1876
Etimologías
Mitosis: thread
Meiosis: lessenkng
Disease causes by error
Mitosis: cáncer
Meiosis: down síndrome
Time
Mitosis: 10 hours (mammals) 20 min (bacteria)
Meiosis: diff org, 6 ha yeast, 40 years females human, 24 days men
In what organisms they perform/ appear?
Mitosis: uni and multi celular eukaryotes
Meiosis: organisms that have sexual reproduction
Stages
Interphase
Prophase
Metaphase
Anaphase
Telophase
