Eukaryotic Cells

Question 1

Examples of eukaryotic organisms

Answer 1

Animals, plants and fungi

Question 2

Key features of a eukaryotic cell

Answer 2

-DNA contained in membrane-bound (surrounded by membrane) nucleus
- Some eukaryotic cells can lose nucleus as develop- red blood cells
-DNA tightly wrapped around proteins called histones-together, DNA and histone proteins form chromosomes.

Question 3

Why is DNA coiled

Answer 3

By tightly coiling their DNA into chromosomes, eukaryotic cells can pack a great deal of DNA into their nucleus.

Question 4

DNA is a ____ molecule

Answer 4

DNA is a linear molecule, word linear means ends of DNA molecule in a chromosome are not joined together to form a loop.

Question 5

What are the membrane bound organelles in a eukaryotic cell

Answer 5

Mitochondria, Golgi apparatus and the endoplasmic reticulum
- in plant cells we also find chloroplast and vacuole

Question 6

Which organelles are not membrane bound in eukaryotic cells

Answer 6

Ribosomes (80S)
S=how quickly organelles move in a centrifuge.

Question 7

What are eukaryotic cells surrounded by

Answer 7

A cell surface membrane, helps control molecules which can pass in and out of a cell. - in plants and fungi, the cell membrane is surrounded by a cell wall.

Question 8

Function of a cell wall

Answer 8

Helps maintain structure of a cell.
- In plant cells, cell wall is made of polysaccharide cellulose.
-In fungi, the cell wall is made from polysaccharide chitin.

Question 9

What are the cell membranes made out of

Answer 9

Phospholipid bilayers