Biology Questions and Answers
- Does DNA replication
occur in cell division?
Yes. DNA replication occurs in mitosis as
well in meiosis.
- One characteristic of the
DNA molecule is its replication
capability. What are the
consequences of failures
during DNA replication?
Ideally a DNA molin a perfect way. Sometimes hecule should replicateowever
failures in alteration (deletion, the duplicationaddition occur, withor
substitution) of one or more nucleotides
in the molecule.
Those mistakes, or mutations, therefore
make chanprocess too. For ges in the protein synthexample, the esis
production of an important protein for
cells or utile or inutile ptissues may be suppressed, nroteins can be created,ew
etc. The mistakeand the resulting in the DNA dproduction ouplicationf altered
genetic material are some of the main
creative evolution forces fand the diversity of species.or the biological
- Mistakes may happen
during every copying process.
The same is true for DNA
replication. Are there
correction systems in cells
that try to fix those mistakes?
Under which situation are the
mistakes carried only by the
individual owner of the cell
within which the mistake has
occurred and in which
situation are they transmitted
to other individuals?
The cell is equipped with system that tries to fix mistakesan enzymatic of the (^)
DNA replication phowever is not completrocess. This systemely efficient.
DNA replication mistakesoriginal individual where the failure are kept in the
occurred when the phenomenon affects
somaticoccurs i cells. If a replicationn the formation of a germline mistake
cell (e.g., in gametes) alteration may be transmitted to the DNA (^) the
offspring of the individual.
- Where can RNA be found
within cells?
In the eukaryote cell nucleus RNA can
be found dispersed in the nuclear along with DNA, and as the main fluid,
constituent of the nucleolus. In cytosol
(in eukaryotes or molecules can be found free, asin bacteria) RNA
structural constituent of ribosomes
(organelles spsynthesis) or even associatedecialized in protein to them (^) in
the process of making proteins.
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