TOPIC 1 -- CELLS

Question 1

Function of cell membrane

Answer 1

controls the exit and entry of materials in the cell

Question 2

Function of cytoplasm

Answer 2

the site of metabolic reactions

Question 3

function of nucleus

Answer 3

controls metabolic reaction + contains DNA

Question 4

function of mitochondrion

Answer 4

site of aerobic respiration

Question 5

function of cell wall

Answer 5

prevents the cell from bursting

Question 6

function of chloroplast

Answer 6

site of photosynthesis

Question 7

function of vacuole

Answer 7

contains sap + used for storage

Question 8

Structure/characterics of Bacteria

Answer 8

• plasmids
• nuclei (no nucleus)
• circular DNA
• flagellum (for movement)
• cell wall
• pili
• cytoplasm

Question 9

Structure of cell membrane

Answer 9

• phospholipid bilayer
• phospholipids (hydrophilic head + hydrophobic tail)
• cholesterol (maintains the concentration gradient and decreases permeability)
• integral and peripheral proteins

Question 10

different levels of organisation

Answer 10

cell (liver cell, red blood cell, epithelia cell) → tissue (muscle tissue)→ organ (heart, skin, liver) →organ system (respiratory system, circulatory system) →organism (humans, pigs)