cell ultrastructure

Question 1

cell wall

Answer 1

cellulose cell wall in plants

Question 2

centrioles

Answer 2

involved in the organisation of the micro tumbles that make up the cytoskeleton

form the spindle fibres used to move chromosomes in nuclear division

Question 3

chloroplasts

Answer 3

site of photosynthesis

Question 4

cilia

Answer 4

small hair like extension of cell-surface membrane containing microfibres

large numbers work in synchronised fashion

able to move while organism or to move fluid (mucus) across a surface

Question 5

cytoskeleton

Answer 5

a network of microtublesand microfilaments

provides mechanical strength,support and structure for the cell

maintains the cell shape and is used in some cells to change the shape of the cell

enables movement of organelles inside the cell

enables movement of the whole cell

Question 6

flagella

Answer 6

large extension of cell surface membrane containing microtubules

able to beat to enable locomotion or move fluids

Question 7

Golgi apparatus

Answer 7

modifies proteins made in the ribosomes

often adds a carbohydrate group

repackages proteins into vesicles for secretion

Question 8

lysosomes

Answer 8

small vacuoles containing hydrolytic or lytic enzymes

Question 9

mitochondria

Answer 9

site of aerobic respiration

Question 10

nucleus, nucleolus and nuclear envelope

Answer 10

contains the genetic material

controls activities

the nuclear envelope separates the genetic material from the cytoplasm

the nucleolus assembles the ribosomes

Question 11

ribosomes

Answer 11

site of protein synthesis

Question 12

rough endoplasmic reticulum

Answer 12

Holds many of the ribosomes

provides a large surge area for protein synthesis

Question 13

smooth endoplasmic reticulum

Answer 13

associated with the synthesis,storage and transport of lipids and carbohydrates