iNU(CLEUS)
Introducing the….
“Let nucleus do the thinking”
Kelsey Wong P3 10/21/10
-The nucleus contains most of the cell’s DNA mostly in the
form of chromatin. The chromatin will organize to form
chromoso...
Nuclei are located in eukaryotic cells.
They are in most plant and animal
cells.
Is there a nucleus in all types of cells?...
Nucleus Diagrams
What is the nuclear envelope?
 The nuclear envelope (membrane) is a double
lipid bilayer which encloses the genetic
mater...
-The Inner membrane of the nuclear envelope is next to a thin layer
of thin filaments which surrounds the nucleus except a...
-Nuclear pores are on the membrane of the nucleus of a cell, and they
allow the transport of water-soluble materials throu...
What does the nuclear envelope do?
-It serves as a
barrier
between the
cell’s
cytoplasm
and the
materials
inside the
nucle...
What is Chromatin?-
-Chromatin is a mass of DNA and proteins that condense to form
chromosomes during cell division..
- Ho...
What is the nucleolus?
-It is composed of the main products of the rRNA
(ribosome ribonucleic acid) genes, as well as thei...
Why should you buy a nucleus?
-The nucleus is the control center/brain of
the cell.
-Without it, your cell wouldn’t be abl...
How much does the nucleus cost?
For a limited time only, the
nucleus will cost $349.99!
This is the deal of a lifetime,
be...
Thank you for
watching!
Any questions?
Bibliography
Miller, Kenneth R., and Joseph S. Levine. Prentice Hall Biology. Boston, Massachusetts: Pearson
Prentice Hall...
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The nucleus

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This was a project for my Bio class
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The nucleus

  1. 1. iNU(CLEUS) Introducing the…. “Let nucleus do the thinking” Kelsey Wong P3 10/21/10
  2. 2. -The nucleus contains most of the cell’s DNA mostly in the form of chromatin. The chromatin will organize to form chromosomes during cell division. The chromosomes contain a set number of genes. Genes control every single trait. - It Directs all activities inside the cell including cell growth, metabolism, protein synthesis, and reproduction (cell division). -The Nucleus is like the brain in a cell. It controls all of the cell's movements and actions, and even when the cell is about to die, the nucleus never stops working -It has instructions for making proteins and other molecules. Functions of the nucleus
  3. 3. Nuclei are located in eukaryotic cells. They are in most plant and animal cells. Is there a nucleus in all types of cells? AnimalcellPlantcell Red Blood Cells Red blood cells (animal cell) do not have a nucleus. Xylem cells (plant cell) lose their nuclei as they mature. Xylem Cells Prokaryotic cells (bacteria) do not have a nucleus.
  4. 4. Nucleus Diagrams
  5. 5. What is the nuclear envelope?  The nuclear envelope (membrane) is a double lipid bilayer which encloses the genetic material in eukaryotic cells. The nuclear envelope is made of an outer membrane and an inner membrane.  The outer membrane is connected with the rough endoplasmic reticulum while the inner nuclear membrane is the main dwelling for many inner nuclear membrane proteins.  The outer membrane and inner membrane enclose a flattened sac and are connected at the nuclear pores.
  6. 6. -The Inner membrane of the nuclear envelope is next to a thin layer of thin filaments which surrounds the nucleus except at the nuclear pores. This structure is called the “nuclear lamina”. -Consists of intermediate filaments, these intermediate filaments are polymers of lamin. -Lamin: fibrous proteins providing structural function and for the cell nucleus. -The lamins may be involved in the functional organization of the nucleus. -They may play a role in assembly and disassembly before and after mitosis. What is the “nuclear lamina”?
  7. 7. -Nuclear pores are on the membrane of the nucleus of a cell, and they allow the transport of water-soluble materials through the nuclear envelope -There are roughly 2000 pores on one nucleus -Nuclear pores regulate this traffic to ensure that only some molecules can enter and exit the nucleus of the cell. -While small water-soluble molecules can pass freely through the nuclear pore, larger molecules like proteins and RNAs can only do so if they possess a sorting signal that the proteins in the nuclear pore will recognize. What are the nuclear pores?
  8. 8. What does the nuclear envelope do? -It serves as a barrier between the cell’s cytoplasm and the materials inside the nucleus (DNA). -Monitors the substances leaving and entering the nucleus
  9. 9. What is Chromatin?- -Chromatin is a mass of DNA and proteins that condense to form chromosomes during cell division.. - Holds DNA, so it hold genes and determine the function of cells . -Chromatin is an essential part of the genetic makeup of eukaryotic cells; by controlling replication, cell function and storing genetic information, chromatin is one of the building blocks of a successful organism. The basic subunit of chromatin structure. Nucleosomes are visible. Nuclosomes are visible as beadlike regions along the chromosomes during meiotic prophase. Each is composed of DNA wound around a histone protein core, which itself consists of two copies each of four different types of histones. 
  10. 10. What is the nucleolus? -It is composed of the main products of the rRNA (ribosome ribonucleic acid) genes, as well as their proteins and enzymes. -Ribosomal RNA (rRNA) is and assembled within the nucleolus. -Malfunction of nucleoli can be the cause for several human diseases.
  11. 11. Why should you buy a nucleus? -The nucleus is the control center/brain of the cell. -Without it, your cell wouldn’t be able to function. The nucleus makes sure everything is orderly. -The nucleus holds most of the DNA of the cell, so it has all the hereditary information of the cell. Basically, it’s like the brain of the cell.
  12. 12. How much does the nucleus cost? For a limited time only, the nucleus will cost $349.99! This is the deal of a lifetime, because the nucleus includes the nucleolus, nuclear envelope, nuclear pores, chromosomes, and chromatin. It’s like getting five items for the price of one! BUY THREE OR MORE NUCLEI AND EACH ONE WILL COST $329.99!
  13. 13. Thank you for watching! Any questions?
  14. 14. Bibliography Miller, Kenneth R., and Joseph S. Levine. Prentice Hall Biology. Boston, Massachusetts: Pearson Prentice Hall, 2007. 169-176. Print. Sandhyarani, Ningthoujam. "Cell Nucleus: Structure of Functions." Cell Nucleus (2010): n. pag. Web. 21 Oct 2010. <http://www.buzzle.com/articles/cell-nucleus-structure-and- functions.html>. Simmons, Kent. "The Nucleus." Nucleus n. pag. Web. 21 Oct 2010. <http://kentsimmons.uwinnipeg.ca/cm1504/nucleus.htm>. Wilson, Katherine L. "Nucleus-Biology Encyclopedia." Nucleus n. pag. Web. 21 Oct 2010. <http://www.biologyreference.com/Mo-Nu/Nucleus.htmlinnipeg.ca/cm1504/nucleus.htm>. "Nucleus-Function." Nucleus n. pag. Web. 21 Oct 2010. <http://www.ibiblio.org/virtualcell/textbook/chapter3/nucf.htm>.

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