Cell structure

Question 1

Cell membrane

Answer 1

Separates the contents of the cell from its outside environment; holds all organelles together in cytoplasm, semi permeable.

Question 2

Cell Wall

Answer 2

External structure which surrounds the cell membrane provides cell structural strength and protection; plants don’t have bones therefore need something to keep in place. PLANTS ONLY.

Question 3

Cytoplasm

Answer 3

Watery, gel-like fluid inside the cell membrane in which organelles are suspended in, gives cell shape.

Question 4

Cytoskeleton

Answer 4

Network of microtubules, microfilaments and intermediate filaments. ‘Spider web’ throughout the entire cell to hold organelles in place.

Question 5

Centrioles

Answer 5

Small pair of cylindrical structures made of microtubules wound up together. Involved in cell division in which they pull chromosomes apart.

Question 6

Pili and Flagella

Answer 6

Hair like appendages made of microtubules and are external, held by cell membrane.
Both used to help cells move, flagella is longer.

Question 7

Vacuoles

Answer 7

Membrane bound vesicle which contains fluid; sugars and salts dissolved in water.
Stores substances for when the cell wants to use it, found in most cells but size and quantity varies.
Plant - one large permanent vacuole; turgor pressure is water in vacuole pushes out the cell walls maintaining cells shape.
Animal - small, temporary