Levels of Organisation

Question 1

Give 7 levels of organisation in an organism

Answer 1

1) DNA
2) Nucleus
3) Cells
4) Tissues
5) Organs
6) Organ Systems
7) Organism

Question 2

Give 3 structures of the DNA

Answer 2

1) Inside nucleus
2) Contains chromosomes
3) Weak hydrogen bonds e.g. ATCG

Question 3

Give 3 functions of the DNA

Answer 3

1) Replicate itself
2) Genes code specific proteins for each cell
3) Send instructions needed for the development, survival and reproduction of living organisms

Question 4

Give 2 structures of the nucleus

Answer 4

1) Contains DNA

2) Surrounded by nuclear membrane

Question 5

Give 2 functions of the nucleus

Answer 5

1) Regulate gene expression

2) Control many of the functions of the cell by controlling protein synthesis

Question 6

Give 2 structures of cells

Answer 6

1) Covered by a cell membrane

2) Contains a nucleus, cytoplasm, mitochondria etc.

Question 7

Give 2 functions of cells

Answer 7

1) Intakes oxygen and nutrients

2) Produces own energy used to perform each cells specialised function

Question 8

Give 4 structures of tissues

Answer 8

1) Nervous
2) Epithelial
3) Connective
4) Muscle e.g. Smooth, Cardiac, Skeletal

Question 9

Give 4 functions of tissues

Answer 9

1) Nervous – Allows you to feel pain and respond to adaptations
2) Epithelial – Covers everything on the inside of your body, but only hollow organs on both the inside and outside
3) Connective – Fills in spaces between other types of tissue
4) Muscle – In internal organs, heart or near bones to produce movement