B1.02: sub-cellular structures

Question 1

3 features of cell membrane

Answer 1

• A thin layer made out of fat and protein
• Cell membranes surround the entire cell, thus influence the cell’s shape
• It controls and prevent specific substances to come in or out (partially permeable)

Question 2

2 features of cytoplasm

Answer 2

• A jelly-like material, contains about 70% water
• It’s where
  + all of the cell’s organelles live in
  + many metabolic reactions took place
  + many substances dissolved in

Question 3

2 features of mitochondria

Answer 3

• the powerhouse of cells
• it’s where aerobic cellular respiration took place
  → release energy for cells to carry our living process

Question 4

2 features of ribosome

Answer 4

• smallest organelles

- ribosome uses the instructions in genes to make new protein from amino acids

Question 5

1 key feature of nucleus

Answer 5

• stores and protects the cell’s genetic material from chemicals in the cytoplasm, which controls how the cells grow and work
• Control cell’s division

Question 6

2 features of chloroplast

Answer 6

• Carry out photosynthesis

- Contain a green pigment called chlorophyll

Question 7

4 features of cell wall

Answer 7

• made of criss-cross cellulose’ fribre
• fully permeable
• stop the cell from bursting when staying in pure water
• help and protect the cell

Question 8

4 features of vacuole

Answer 8

• filled with a fluid called cell sap
• storing waste products
• contain water and maintain the cell’s pH
• maintain the cell shape

Question 9

What kind of organelles in plant cells will always be visible under a microscope?

Answer 9

• Ribosome
• Nucleus
• Cell wall
  (remember, not every plant cell have chloroplast)

Question 10

What is a tissue?

Answer 10

A group of cells working together

Question 11

What kind of tissue do all leaves consist of?

Answer 11

Mesophyll, vascular (transport), epidermal tissue

Question 12

what is the membrane around the vacuole?

Answer 12

tonoplast