U2 B5 1HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

B5 The nucleus

• Take off your jacket
• Put your things on your desk

       Book, notebook/laptop, pencil case

• Bag on the floor
• Read pgs. 116-118

Lessongoals

• You can name the features of chromosomes
• You can describe the structure of DNA

What part of the cell is a liquid that contains different substances

1. Nucleus
2. Cell membrane
3. Cytoplasm
4. Cell wall

What part makes a cell sturdy/rigid?

1. Nucleus
2. Cell membrane
3. Cytoplasm
4. Cell wall

What part is only found in plant cells?

1. Nucleus
2. Cell membrane
3. Cytoplasm
4. Cell wall

Damian and Gwen are making lists to remember the differences between animal and plant cells.
Name (at least) 3 things they can write on their list for recognizing plant cells.

What does DNA do?

The nucleus

• Contains chromosomes
• Chromosomes > DNA
• Contains hereditary characteristics

Chromosomes

• Human: 46 chromosomes.
• Every body cell contains 46 chromosomes
• Cells in: legs, brain, stomach, fingers, etc.
• Other organisms have different amounts 

You don't need to learn these amounts for the test!

!

Do you notice anything about these amounts?

DNA

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.

You got one half of a DNA-'ladder'. on this part you find the bases ATGGCCTTTA, What bases would be on the half that fits on this one?

How much influence has your DNA on:
The color of your hair

05

How much influence has your DNA on:
your height

05

How much influence has your DNA on:
your weight

05

How much influence has your DNA on:
Your sexuality (straight, gay, etc.)

05

How much influence has your DNA on:
Your favourite music

05

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish