Rough Endoplasmic Reticulum (Rough ER)

Question 1

What is the primary structure of rough endoplasmic reticulum (RER)?

Answer 1

Contains ribosomes on outer surface essential in the production of proteins giving it the rough surface.

This ribosome presence gives it a ‘rough’ appearance.

Question 2

What is the main function of the rough endoplasmic reticulum?

Answer 2

Plays a role in the synthesis (dehydration synthesis) of proteins

Especially those destined for secretion, cell membranes, or organelles like lysosomes.

Question 3

What essential process occurs in the RER for newly synthesized proteins?

Answer 3

Folding into correct three-dimensional shapes

This ensures only properly folded proteins are sent to their next destination.

Question 4

How does the rough endoplasmic reticulum prevent misfolded proteins from leaving?

Answer 4

By ensuring only properly folded and functional proteins are sent to their next destination

This is crucial for maintaining cellular function.

Question 5

What role does the rough endoplasmic reticulum play in protein packaging?

Answer 5

Packages proteins into vesicles to be sent to the golgi apparatus for further processing and sorting

These vesicles are sent to the Golgi apparatus for further processing and sorting.

Question 6

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

Answer 6

True

This structural relationship is important for cellular organization.

Question 7

Where is the RER found?

Answer 7

Found in both plant and animal cells. It surrounds the nucleus and is near the Golgi apparatus