Transcript Why is the nucleus important to the cell?

Why is the nucleus
important to the
cell?
• Controls all of the cell’s function
• Contains genetic material- DNA and chromosomes
Importance of Nucleus
• Chemical that
contains the
information for an
organism’s growth
and function
• Deoxyribonucleic
acid
DNA
• DNA is packed
together to make
chromosomes
• Humans have 46
chromosomes in each
cell
Chromosomes
• Growth
• Development
• Repair
Cell Division
• Cells need to divide so multicellular organisms can grow.
• Adults have about 100 trillion cells
Growth
• Cells develop to become specialized to perform particular
functions (skin cells, nerve cells, muscle cells…)
Development
• Cells divide to repair the body (cuts-broken bones)
• Cells repair and divide at different rates. Skin cells are
constantly repairing, while brain cells live a long time and
don’t divide very often.
Repair
Nucleus-Chromosomes-DNA
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4.
5.
6.
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Steps of Cell Cycle
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•
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Cell begins to grow
Organelles double
DNA is copied
Cell prepare for mitosis-the division of the nucleus
Interphase
• DNA condenses into
chromosomes
• Nuclear membrane
begins to disappear
Prophase
• Chromosomes line up
across the center of
the cell
Metaphase
• Chromosomes are
split and pulled to
opposite sides of the
nucleus
Anaphase
• A new nuclear
membrane forms
around the separated
chromosomes
Telophase
• The division of the
cytoplasm
Cytokinesis
Mitosis
• Binary Fission-division of prokaryotes
• Budding-develop tiny buds that grow into a complete
identical organism
• Regeneration-the growth of new cells at a site of lost
body parts
Types of Asexual
Reproduction