CH 10 : How cells divide
Chromatin is a complex with ~40% DNA and which of the following?
~60% Protein
Some cells remain in the ______________phase permanently while others can proceed to the G1 phase when new cells are needed (e.g., during an injury)
G0
Some cells, such as muscle and nerve cells, remain permanently in which of the following phases of the cell cycle?
G0 phase
In a cell's life, cell growth occurs primarily during what phase?
G1
During interphase, what is the name of the phase that occurs after the replication of DNA and before the start of mitosis?
G2
The bacterial genome consist of a single loop of DNA located in which of the following regions of the cell?
Nucleoid
Bacterial cells divide to produce new cells for which of the following?
Population growth Reproduction
What is the number of haploid chromosomes in humans?
23
Typically, a dividing mammalian cell completes its cell cycle in about how many hours?
24
Identify the diploid number of chromosomes in humans.
46
The human cell contains a total of how many chromosomes?
46 every one has 23 chromosome.
The cells of most eukaryotes have between 10 and which number of chromosomes?
50
During the segregation of the duplicated bacterial chromosome, which part of the chromosome moves towards opposite ends of the cell first?
The origins of replication
During binary fission__________ is(are) replicated and partitioned for cell division.
chromosomes
When DNA replicates the sister chromatids are held together at their centromeres by which of the following complex of proteins?
cohesions
In multicellular eukaryotic organisms, the production of new cells follows a highly regulated sequence of growth, DNA replication, and division. This sequence is referred to as the cell________ , which consists of the G1, S, G2, and M phases.
cycle
Cytokinesis is the division of the cytoplasm to produce two distinct cells which are called which of the following?
daughter
During cell division in both bacterial cells and eukaryotic cells, genetic information is ____________ and segregated and the contents of the cell are divided between the daughter cells.
duplicated
Cell division in bacterial cells and eukaryotic cells involves the replication and segregation of ___________ information and the division of contents within the cell.
genetic
Cell division in bacterial and eukaryotic cells produces which of the following?
genetically identical
Cell division in bacterial and eukaryotic cells produces genetically ___________cells.
identical
In an actively dividing eukaryotic cell, the G1, S, and G2 phases are collectively constitute the ___________.
interphase
The division of the cytoplasm to produce two distinct daughter cells is referred to as .
Cytokinesis
During the _________phase of the cell cycle, the chromosomes are replicated.
S
During which phase of the cell cycle are the chromosomes replicated?
S
How do bacteria reproduce?
binary fission
What is a sequence of growth, replication, and division that produces new eukaryotic cells called?
cell cycle
What usually occurs during the G1 phase?
cells are growing
The region in a bacterial cell where DNA is located is called the
nucleoid
In bacterial cells, the replication of DNA begins at a specific site called the ___________of replication, and proceeds in both directions around the circular DNA until a specific ___________site is reached.
origin, termination
Chromosomes are composed of chromatin which is a complex of DNA and which of the following?
proteins
Binary fission involves __________ and partitioning of chromosomes for cell division.
replication
During DNA replication the chromosomes contract and the identical halves are called _________ __________
sister chromatids
