The nature and variety of living organisms - IGCSE

Question 1

Cell membrane

Answer 1

A partially permeable barrier that surrounds the cell

Question 2

Cell wall

Answer 2

An outer, strctural layer that surrounds some cells
In plant cells it’s made of cellulose In fungi it’s made of chitin

Question 3

Chloroplast

Answer 3

An organelle which is the site of photosynthesis

Question 4

Eukaryotic cell

Answer 4

A type of cell found in plants and animals that contains a nucleus

Question 5

Prokaryotic cell

Answer 5

A type of cell found in bacteria that doesn’t contain a nucleus

Question 6

Plasmids

Answer 6

Loops of DNA found in the cytoplasm of prokaryotic cells

Question 7

Hyphae

Answer 7

Long filaments of a fungus that contain many nucleus

Question 8

Mucor

Answer 8

A multicellular fungus that has a hyphal strcture

Question 9

Mycelium

Answer 9

A collection of thread-like hyphae in a fungus

Question 10

Saprotrophic nutrition

Answer 10

The mode of extracellular nutrition in which digestive enzymes are secreted onto the food outside the cell and the products of digestion are obserbed

Question 11

Virus

Answer 11

Non-living organism that can only reproduce inside host cells
They have no cells, but possess a protein coat containing nucleic acids (DNA or RNA)