Question

1. cystic fibrosis is caused by a defect in a channel that regulates the passage of certain molecules out of the cell. this results in excess fluids in the space outside of the cells within the lungs. what cell structure is malfunctioning? use evidence to support your claim.
2. below are two cells: a normal cell and a damaged cell. compare the 2 cells and identify the organelles that are malfunctioning in the damaged cell. use data to support your answer.

characteristics of normal cell	characteristics of damaged cell
58 proteins produced by cell in 1 hour	50 proteins produced by cell in 1 hour
140 molecules of atp produced	4 molecules of atp produced

organelle malfunctioning and support:

Explanation:

3.

The cell - membrane has channels that regulate molecule passage. Cystic fibrosis is due to a defect in such a channel, causing fluid imbalance outside cells in the lungs. Evidence is the description of a defective channel regulating molecule passage.

Mitochondria are responsible for ATP production. The damaged cell has a drastic reduction in ATP production (4 molecules compared to 140 in the normal cell), indicating mitochondrial malfunction. Also, ribosomes are involved in protein production and there is a decrease in protein production in the damaged cell (50 proteins per hour vs 58 in normal cell), suggesting ribosome malfunction. The nucleus seems to be sending more messages in the damaged cell, but this could be a compensatory or secondary effect.

Answer:

Cell - membrane

4.