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BIO732 PAST PAPERS
BIO732 PAST PAPERS
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Functionally, the prokaryotic chromosome consists of two parts
It is important for cell reproduction:
Duplicate starting point of circle: origin
Replica, named Ori
Reflection End Site:
Copying Terminal, der
Chromosome replication process is the same as that of DNA
Threaded by a “complex complex” of proteins
cell center. These proteins include DNA enzymes
During the process of prokaryotic DNA replication, the cell grows and provides a mechanism for the organized distribution of DNA to the newly formed daughter cells.
DNA division. DNA transcription is actively underway
splitting duplicate DNA molecules into two new molecules
The first part where cells are copied is the ori, which is attached
in the plasma membrane.
As the cell grows, the two halves of the pore split to form new chromosomes and a new plasma membrane pattern. There are two chromosomes at the end of the transcript,
One of the two ends of an elongated bacterial cell.
cytokinesis. Cell division, or cytokinesis, 20. starts from
A few minutes after the chromosome is copied. First
The cytokinesis event is a pinched plasma membrane to form a purse strap-like ring. The fibrils have the same protein as the eukaryotic duplicate (ie.
microtubules) are the main components of this ring. BIO732 PAST PAPERS
Like membrane pinning, new cell wall material
Integrated, which eventually separated the two cells.
eukaryotic cells divide in mitosis or meiosis
Complex eukaryotes such as humans and flowering plants
Derived from a single cell called a fertilized egg. grab this cell
From the parent of cells – ie sperm and egg – by the fusion of two sex cells, i.e.
Genetic material from both parent cells. what does this mean?
A fertilized egg contains a collection of chromosomes
A range from the male parent and the female parent.
formation of a multicellular organism from a fertilized
called egg growth. It involves both cell reproduction
and Cell Special. For example, an adult human has several trillion cells, which are ultimately derived from fertilization.
Eggs and many of them have special roles.
In part three we will discuss how cells specialize in this book. For
Now, we will focus on cell proliferation.
Cell reproduction in eukaryotes, as in prokaryotes,
Includes reproductive signals, DNA replication and isolation
and cytokinesis. But, as you might expect, the events of Ugri-Oats are a bit more complicated. First, unlike prokaryotes.
Eukaryotic cells do not divide continuously when environmental conditions are adequate. In fact, eukaryotic cells already exist
Biodiversity is part of and rarely specializes in isolation. Thus the signals of cell division are not related to the environment of the cell, but to the needs of
Of the whole life Second, instead of a single chromosome, eukaryotes usually have several (46 in humans), so
Reflection and Separation Processes, General
Like prokaryotes, they are more complex.
Third, eukaryotic cells have a unique embryo
They are copied and then split into two new nuclei. Thus, in
Eukaryotes differ in the genome of cytokinesis
Finally, cytokinesis differs from that of plant cells (ie.
Animal cells have a cell wall (they do not).
Main difference between prokaryotic and eukaryotic
Cell reproduction is in eukaryotes, new copy created
chromosomes are related to each other as sisters
The chromatids and mitosis, a new mechanism, are used to separate them into two new nuclei.
Eukaryotic cell reproduction is normal
DNA copy in embryo
Two new nuclei for packaging and replication DNA (nuclear division)
cell division (cytokinesis)
Meiosis is the second mechanism of nuclear division.
Germ cells that produce gametes that contribute to the reproduction of a new organism. Both the products of mitosis are genetically identical to the cell that made them. BIO732 PAST PAPERS
They both have the same DNA – products of meiosis
As we will see later in chapter number, meiosis creates diversity through mixing of genetic material, resulting in new
genetic combination. It plays an important role in the cycle of sex life.
What determines whether a cell divides or not? How
Does mitosis lead to homozygous cells and meiosis? Why
Do we need identical copies and different cells?
Do most eukaryotic organisms reproduce sexually? on the pages
In the following, we will describe interface, mitosis and meiosis and the effect on heredity,
Growth and development.
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