Animal And Plant Cells

Question 1

Size of animal cells

Answer 1

• Around 10-30 um long

Question 2

Sub cellular structures in an animal cell

Answer 2

• Nucleus - controls activities of cell and contains genetic information. Surrounded by nuclear membrane. Diameter of 10 um
• Cytoplasm - gel-like substance where most of the chemical reactions happen. Contains enzymes.
• Cell membrane - holds the cell together and controls what goes in and out
• Mitochondria - where most of the reactions for aerobic respiration take place.
• Ribosomes - where proteins are made in the cell

Question 3

How big are plant cells?

Answer 3

• often bigger than animal cells - between 10-100 um long

Question 4

Sub-cellular structures of a plant cell

Answer 4

• Nucleus, cytoplasm, cell membrane, mitochondria, ribosomes
• rigid cell wall - made of cellulose, supports and strengthens cell
• permanent vacuole - contains cell sap to keep cell rigid/support the plant
• chloroplasts - where photosynthesis occurs, contain a green substance called chlorophyll which absorbs light needed for photosynthesis

Question 5

What plant cells don’t contain chloroplasts?

Answer 5

• Root cells - underground so don’t photosynthesise
•Potato/onion cells

Question 6

A cell that has half the number of usual chromosomes is called what?

Answer 6

Haploid

Question 7

Where do the majority of metabolic reactions take place?

Answer 7

Cytoplasm

Question 8

What type of cell is a sperm cell?

Answer 8

A eukaryote