2. TONGUE TWISTER
• There with the weather-beaten
weatherman.
• Imagine an imaginary menagerie
manager imagining managing an
imaginary menagerie.
• Three hundred thirty-three thousand
three hundred thirty-three.
8. Robert Brown
- introduced the word areola or
nucleus, in the cells of the flower's outer
layer.
Matthias Schleiden
-name "Cytoblast" (cell builder).
9. Robert Remak and Rudolf Virchow
propagated the new paradigm that cells
are generated solely by cells ("Omnis
cellula e cellula").
The function of the nucleus clear only
later, after mitosis discovered and the
Mendelian rules 20th century).
11. CELL NUCLEUS
• Latin nucleus or
nuculeus,
meaning kernel.
• The control center of the
cell.
• It contains most of the
cell's genetic material.
12. PRIMARY FUNCTIONS:
• Repository of genetic information
• Enables synthesis of nearly all proteins
• Houses the nucleolus
• Responsible for production of
ribosomes.
• Selective transportation of regulatory
factors and energy.
14. NUCLEAR ENVELOPE
separates the cell's genetic material from
surrounding cytoplasm.
serve as a barrier between nucleoplasm
and the cytoplasm.
15. NUCLEOPLASM
made up of water and other
dissolved substances.
act as a suspension for organelles
maintains the shape of the nucleus.
16. NUCLEAR PORE
composed of multiple proteins
allows the passage of molecules
from inappropriate entering or
exiting the nucleus.
17. NUCLEAR LAMINA
• structural support for the nuclear
envelope
• anchoring sites for chromosomes
and nuclear pores.
18. PROGERIA
• Defective Lamina
protein makes the
nucleus unstable. That
nuclear instability
appears to lead to the
process of premature
aging in Progeria.
19. CHROMOSOMES
Multiple linear DNA molecules.
During most of the cell cycle
these are organized into chromatin
During cell division the chromatin can
be seen to form the well-defined
chromosomes.
22. Which of the following parts of
nucleus is responsible for the
formation of the ribosomes?
nucleoplasm
nucleolus
nuclear
envelope
chromosomes
A
B nucleolus
C
D
23. In the nucleus of eukaryotic cells, the genetic
material is complexed with protein and
organized into linear structures called:
A centrioles
chromosomes
histones plasmids
B
C D
24. Provide structural support for the nuclear
envelope and anchoring sites for
chromosomes and nuclear pores.
A Nucleoplasm
C
Cytosol
Nuclear Lamina
B
D
Nuclear
Membrane
25. The space between the
membranes is called:
perinuclear
space
internuclear
space
nuclear space
none of these
A
B
C
D
perinuclear
space
26. It prevents larger molecules, such as
nucleic acids and larger proteins, from
inappropriately entering or exiting the
nucleus.
nuleolus
nuclear
envelope
nuclear lamina
A
B
C
D nuclear pores
27. It serves as a barrier that prevent
macromolecules from diffusing freely
between the nucleoplasm and cytoplasm.
nuleolus
nuclear
envelope
nuclear lamina
nuclear pores
A
B
C
D
28. ASSIGNMENT:
In 1 whole sheet of paper give a brief
description of the following:
• DNA
• Histone
• Centromere
• Telomere