Chapter 1

Question 1

What is the endoplasmic reticulum (ER)?

Answer 1

A series of membranes that form flattened sacs within the cell cytoplasm.

Question 2

How is the endoplasmic reticulum linked within the cell?

Answer 2

It is linked with the nuclear envelope.

Question 3

What are the two distinct types of endoplasmic reticulum?

Answer 3

• Rough endoplasmic reticulum (RER)
• Smooth endoplasmic reticulum (SER)

Question 4

What is a characteristic feature of rough endoplasmic reticulum (RER)?

Answer 4

It has ribosomes on its surface.

Question 5

What is the main role of the rough endoplasmic reticulum (RER)?

Answer 5

To process proteins that are produced on the ribosomes.

Question 6

What is a characteristic feature of smooth endoplasmic reticulum (SER)?

Answer 6

It does not have ribosomes on its surface.

Question 7

What are the functions of the smooth endoplasmic reticulum (SER)?

Answer 7

• Production of lipids
• Production of steroid hormones such as oestrogen and testosterone

Question 8

True or False: The rough endoplasmic reticulum (RER) is continuous with the nuclear envelope.

Answer 8

True

Question 9

Fill in the blank: The rough endoplasmic reticulum (RER) is involved in processing _______.

Answer 9

proteins

Question 10

Fill in the blank: The smooth endoplasmic reticulum (SER) is involved in the production of _______ hormones.

Answer 10

steroid

Question 11

What distinguishes the rough endoplasmic reticulum (RER) from the smooth endoplasmic reticulum (SER)?

Answer 11

The RER has ribosomes on its outer surface, while the SER lacks ribosomes.