Cell Nucleus
1. What are cells with a
delimited nucleus called?
What are the main elements
of the nucleus?
2. Do all eukaryotic cells have
nucleus and only one nucleus?
3. Of which substances is
chromatin made?
4. What are heterochromatin
and euchromatin?
5. What is the relation
between the concepts of
chromatin and chromosome?
Are euchromatin and
heterochromatin part of
chromosomes?
6. In the phase when the cell
is not dividing (interphase) is
there activity within the cell
nucleus?
7. How are the concepts of
chromosome, chromatin and
chromatids related? In which
phase of the cell cycle does
DNA duplicate?
8. What is the structure that
maintains identical chromatids
bound?
9. How isthechromosome
region where the centromere
is located called? How are
chromosomesclassified in
relation to the positionof their
centromere?
10. What are the primary and
the secondary constrictions of
a chromosome? What is the
other name given to the
secondary constriction?
11. What are homologous
chromosomes? Which are the
human cells that do not have
homologous chromosomes?
12. What is the difference
between the concepts of
karyotype and genome?
13. Can two normal
individuals of the same
species with sexual
reproduction have identical
genomes and identical
karyotypes? How is the human
karyotype usually
represented?
14. What is the other name
given to sex chromosomes?
What is the function of sex
chromosomes?
15. How many chromosomes
does a human normal haploid
cell have? How many
chromosomes does a human
normal diploid cell have? How
many are the sex
chromosomes within each of
them?
16. Do phylogenetically
proximal species have cells
with proximal chromosome
counts?
17. What is the nucleolus?
18. Of which structures is the
nuclear membrane composed?