Page 14 - The Cell and Its Components

 RNA - In addition to DNA the nucleus holds
another type of nucleic acid called RNA
(ribonucleic acid). RNA plays an important role in
making proteins called protein synthesis or
translation.
 DNA replication - The nucleus can make exact
copies of its DNA.
 Transcription - The nucleus makes RNA which can
be used to carry messages and copies of DNA
instructions.
 Translation - The RNA is used to configure amino
acids into special proteins for use in the cell.

Interesting Facts about the Cell Nucleus
 The nucleus was the first of the cell organelles to
be discovered by scientists.
 It usually takes up about 10 percent of the cell's
volume.
 Each human cell contains around 6 feet of DNA
which is tightly packed, but very organized with
proteins.
 The nuclear envelope breaks down during cell
division, but reforms after the two cells separate.
 Some scientists think that the nucleolus plays an
important role in cell aging.
 The cell nucleus was given its name by Scottish
Botanist Robert Brown.

Activity:
1) Eukaryotic Cells are defined as:
Only animal cells
Only plant cells
Having a nucleus
Having two nuclei
Not having a nucleus