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nucleus and cell division
2.5 & 2.6: The nucleus and the cell division
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Biologie
Middelbare school
vwo
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2.5 & 2.6: The nucleus and the cell division
Slide 1 - Diapositive
Planning of today
SO!
Repetition 2.4 cells
Moving on to 2.5 & (maybe) 2.6: nucleus and cell division
Slide 2 - Diapositive
Repetition 2.4: cells!
Open your books page 112
Slide 3 - Diapositive
What is nucleus? Where do you find that?
Slide 4 - Question ouverte
The nucleus
Contains chromosomes
Chromosomes > DNA
Contains hereditary characteristics
For example you eye color
Slide 5 - Diapositive
Slide 6 - Diapositive
Slide 7 - Diapositive
What does DNA do?
Slide 8 - Question ouverte
DNA (Deoxyribonucleic acid)
Lots of base pairs together form
genes
A base pair is made from 2 pieces, these are called
bases
.
T and A form a pair
C and G form a pair
Other pairs do not exist in DNA.
DNA is shaped like a ladder.
The ladder is built by using lots of
base pairs
.
Slide 9 - Diapositive
Slide 10 - Diapositive
Slide 11 - Diapositive
Slide 12 - Diapositive
Slide 13 - Diapositive
Slide 14 - Question de remorquage
Try to describe what you're seeing here right now!
Slide 15 - Question ouverte
Cell division
Cell division is happening constantly in your body:
3,5 kg of new skincells every year
200.000.000.000 new bloodcells every day
Cells also die a lot!
More new cells than dead cells > growth
Slide 16 - Diapositive
Cell cycle
Slide 17 - Diapositive
Cell cycle
1 daughter cell > specialised cell > heartcell, musclecell, bloodcell, etc.
1 dochtercel > stem cell > parent cell
Stem cells can divide into new cells
Stem cells don't specialise,
but they're responsible for growth
and for the recovery of the body
tissues
Bone marrow: fat cell/bone cell/
blood cell
skin cells
nerve cell
blood cells
embryonic stem cell
Slide 18 - Diapositive
A human stem cell divides.
The daughtercells are called cell A and cell B.
How many chromosomes are in cell A? (only use numbers)
Slide 19 - Question ouverte
Cell A is a stem cell.
Cell A divides into cell B and C.
Cell B becomes a liver cell.
What happens with cell C?
A
Becomes a liver cell
B
Becomes a body cell
C
Becomes a stem cell
D
Impossible to tell
Slide 20 - Quiz
Homework
B5. 1, 2, 5, 7, 9 + B5. 3, 4, 8
Test yourself 2.4
Flash cards 2.4
B6. 1, 2, 4, 7
Slide 21 - Diapositive
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