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B1: Quiz 8 – Answers
B1: Quiz 8 – Answers
1)
a) 23 pairs or 46
b) DNA
2) Growth and repair
3)
a) Interphase and mitosis
b) Interphase
4)
a) Parent cell
b) Daughter cells
c) Genetically identical
5)
a) Long strands of DNA
b) In chromosomes/ x-shaped chromosomes
6)
a) The cell increases the number of subcellular structures (such as mitochondria and ribosomes), and duplicates the genetic material (copies DNA)
b) The X-shaped chromosomes line up along the centre of the cell. The chromosomes then release cell fibres to opposite poles (sides) of the cell. These cell fibres shorten which pulls the two arms of each X-shaped chromosome to opposite poles of the cell.
Membranes start to form around each of the sets of chromosomes at opposite sides of the cell. This creates the nuclei of the two daughter cells.
The cytoplasm and cell membrane divide to create two daughter cells that are genetically identical to each other and the parent cell
a) 23 pairs or 46
b) DNA
2) Growth and repair
3)
a) Interphase and mitosis
b) Interphase
4)
a) Parent cell
b) Daughter cells
c) Genetically identical
5)
a) Long strands of DNA
b) In chromosomes/ x-shaped chromosomes
6)
a) The cell increases the number of subcellular structures (such as mitochondria and ribosomes), and duplicates the genetic material (copies DNA)
b) The X-shaped chromosomes line up along the centre of the cell. The chromosomes then release cell fibres to opposite poles (sides) of the cell. These cell fibres shorten which pulls the two arms of each X-shaped chromosome to opposite poles of the cell.
Membranes start to form around each of the sets of chromosomes at opposite sides of the cell. This creates the nuclei of the two daughter cells.
The cytoplasm and cell membrane divide to create two daughter cells that are genetically identical to each other and the parent cell
Questions
1)
a) How many chromosomes does a typical human cell have?
b) What substance makes up chromosomes?
2) There are two reasons why we need to increase the number of cells in our body. What are these two reasons?
3)
a) There are two different parts in the cell cycle; what are these two different parts?
b) Of the two different parts in the cell cycle, which part does the cell spend a longer time in?
4) The cell cycle takes 1 cell and produces 2. A very basic diagram of this is shown below.
1)
a) How many chromosomes does a typical human cell have?
b) What substance makes up chromosomes?
2) There are two reasons why we need to increase the number of cells in our body. What are these two reasons?
3)
a) There are two different parts in the cell cycle; what are these two different parts?
b) Of the two different parts in the cell cycle, which part does the cell spend a longer time in?
4) The cell cycle takes 1 cell and produces 2. A very basic diagram of this is shown below.
a) What is the cell at the top of the diagram known as?
b) What are the 2 cells at the bottom of the diagram known as?
c) Are all three of the cells genetically identical or genetically different?
5)
a) In a cell that is not dividing, how is the genetic material arranged?
b) After the DNA has been copied and the cell is ready to divide, how is the genetic material arranged?
6)
a) Give two things that happen in the interphase of the cell cycle.
b) Describe what happens in the mitosis phase of the cell cycle.
b) What are the 2 cells at the bottom of the diagram known as?
c) Are all three of the cells genetically identical or genetically different?
5)
a) In a cell that is not dividing, how is the genetic material arranged?
b) After the DNA has been copied and the cell is ready to divide, how is the genetic material arranged?
6)
a) Give two things that happen in the interphase of the cell cycle.
b) Describe what happens in the mitosis phase of the cell cycle.