CFTR Protein and Cellular Processes

The video tutorial covers cellular organelles, focusing on the CFTR protein associated with cystic fibrosis. It explains the pathway for CFTR protein production from gene expression to its final cellular location, emphasizing the roles of the nucleus, rough ER, Golgi apparatus, and plasma membrane. The tutorial also evaluates student responses and discusses the location of ribosomes involved in CFTR protein synthesis. Additionally, it addresses the location and function of mutant CFTR proteins with amino acid substitutions.

What is the primary function of the CFTR protein?

• To transport glucose

• To degrade proteins

• To act as a gated ion channel

• To synthesize ATP

Where does the initial step of CFTR protein production occur?

• In the nucleus

• In the lysosome

• In the mitochondria

• In the Golgi apparatus

Which organelle is responsible for packaging and modifying the CFTR protein?

• Golgi apparatus

• Nucleus

• Lysosome

• Rough ER

What is the role of the Golgi apparatus in protein synthesis?

• To degrade proteins

• To synthesize proteins

• To package and modify proteins

• To transport proteins to the nucleus

Why does the CFTR protein not go to the mitochondria?

• It needs to be degraded

• It is synthesized in the mitochondria

• It requires ATP from the mitochondria

• It is not part of the endomembrane system

What is the final destination of the CFTR protein in the cell?

• Mitochondria

• Nucleus

• Plasma membrane

• Lysosome

What was the student's correct response regarding the CFTR protein pathway?

• Nucleus to rough ER to Golgi to plasma membrane

• Rough ER to mitochondria

• Nucleus to lysosome

• Golgi to nucleus

Where are ribosomes that synthesize membrane proteins typically located?

• In the cytoplasm

• In the Golgi apparatus

• In the nucleus

• On the rough ER

What is the likely location of a mutant CFTR protein with an amino acid substitution?

• In the lysosome

• In the plasma membrane

• In the nucleus

• In the mitochondria

Why is it important to write complete sentences for identification questions?

• To confuse the examiner

• To make the answer longer

• To ensure clarity and completeness

• To avoid losing marks