Lesson 4

Question 1

What do ribosomes do?

Answer 1

They synthesise proteins by reading code on mRNA in cytoplasm (translation)

Question 2

Describe structure of a ribosome

Answer 2

Made of large and small subunits which are made of mRNA and proteins

Question 3

What is the rough endoplasmic reticulum?

Answer 3

A network of flattened membrane sacs (cisternae) that is connected to the nuclear envelope

Question 4

What is the function of RER?

Answer 4

Carries out protein synthesis and transport of proteisn

Question 5

What is the smooth endoplasmic reticulum?

Answer 5

Focuses on the building and transport of lipids and is associated with cells containing lots of carbohydrates, fats or proteins and those dedicated to secretion such as the liver

Question 6

What is the Golgi body?

Answer 6

Network of interconnected flattened sacs

Question 7

Name the 3 main functions of the Golgi body

Answer 7

• Modifying and packaging of proteins
• Producing glycoproteins
• Forming lysosomes

Question 8

What are lysosomes and what do they do?

Answer 8

Single-membrane sacs which have digestive enzymes which are used for the breaking down of old cel parts or engulfed materials such as bacteria