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Cell nucleus


In cell biology, the nucleus is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nu...

What is the function of the genetic material in a cell? | Reference.com


The two main functions of the genetic material in a cell, also known as DNA, are ... Animal Cells Actively Replicate Their Genetic Material during · Phases of ...

The cell cycle, mitosis and meiosis — University of Leicester


Chromosomes replicated during the S phase are divided in such a way as to ensure that ... In actively dividing animal cells, the whole process takes about one hour. ... This separation of the genetic material in a mitotic nuclear division (or ... led by their centromeres, migrate to the equatorial plane in the mid-line of the cell  ...

The Life Cycle of Cells - Molecular Cell Biology - NCBI Bookshelf


A cell in an adult organism can be viewed as a steady-state system. ... Either event sets off a cell-replication program that is encoded in the DNA and executed by proteins. ... each containing an identical copy of the parental cell's genetic material. ... The immune-system cells not only actively survey their environment with ...

Interphase - Boundless


Cells must grow and duplicate their internal structures during interphase ... Cells spend most of their lives in interphase, specifically in the S phase where genetic material ... the stage in the life cycle of a cell where the cell grows and DNA is replicated ... At the center of each animal cell, the centrosomes of animal cells are  ...

cell - Cell division and growth | biology | Britannica.com


Aug 8, 2016 ... Duplication of the genetic material ... There are also repair systems that correct genetic damage to DNA. ... In eukaryotes the processes of DNA replication and cell division occur at different times of the cell division cycle. ... In animal cells cytokinesis is achieved through the constriction of the cell by a ring of ...



The nucleic acid carries the virus's genome--its collection of genes--and may ... is a dormant particle; but within an appropriate host cell, it becomes an active ... Occasionally during the prophage's exit, some of the host cell's genetic material will be ... Viral infections of plant and animal cells resemble those of bact...

cell | biology | Britannica.com


Aug 8, 2016 ... Cell, in biology, the basic membrane-bound unit that contains the ... Animal cells and plant cells contain membrane-bound organelles, including a distinct nucleus ... During cell growth, the cell ingests certain molecules from its ... These products are used for cell growth and the replication of genetic material.

Organelles | Cell Organelles | Important | Biology@TutorVista.com


Eukaryotic cells have compartmentalization in their cells. ... Organelles like the nucleus and golgi apparatus are usually single while others like mitochondria, ... They are capable of self-replication as they possess their own DNA. ... It contains the genetic material of the cell which are organized as multiple long linear DNA .....

Virus (life science)


Viruses consist of genetic material—either deoxyribonucleic acid (DNA) or ribonucleic ... Some icosahedral and helical animal viruses are enclosed in a lipid ... The viral genome is replicated every time the host cell replicates its DNA and is thus .... Many pharmaceutical and biotechnology companies are actively pursuing ...

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Where is the genetic material found in a cell? | Reference.com


DNA, or deoxyribonucleic acid, is found in the nucleus of a cell. ... Genetic Material · Animal Cells Actively Replicate Their Genetic Material during · Three Basic ...

Viral Life Cycles in Cells


As discussed in lecture 1, there is a period between infection of a cell and .... In animals, most cells are not actively dividing, and are arrested in the G1 ... The early genes encode proteins that are required for viral DNA replication ... As discussed previously, many families of animal viruses have RNA as their genetic material.

The Eukaryotic Cell Cycle - The Cell - NCBI Bookshelf


In bacteria, cell growth and DNA replication take place throughout most of the ... the cell is metabolically active and continuously grows but does not replicate its DNA. .... The proliferation of most animal cells is similarly regulated in the G1 phase of ... the daughter cells failed to inherit complete copies of the genetic material...