S phase Cyclin–CDKs

In human - cyclin A-CDK 2 

In budding yeast - CIb 5/6-Cdc 28

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#Section 3: Genetics, Cellular and Molecular Biology

Most common CFTR mutation is a ΔF508 -

Prevents normal transport of CFTR to the plasma membrane by blocking its packaging into COPII vesicles budding from the ER. 

Change the conformation of the cytosolic portion of CFTR so that the signal is unable to bind to Sec24.

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#Section 3: Genetics, Cellular and Molecular Biology

An H+ ATPase in the membrane pumps H+ into the lysosome, maintaining its lumen at an acidic pH.

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#Id: 9186

#Section 3: Genetics, Cellular and Molecular Biology

Relative genotypic frequency after selection

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#Section 2: General Biology

The surfaces of the cells that form the alveoli (small air spaces of the lung) are coated with surfactant, which decreases the alveolar surface tension. 

Lung surfactant contains 80 to 90% phospholipid by weight, and 70 to 80% of the phospholipid is phosphatidylcholine, mostly the dipalmitoyl species.

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#Id: 8952

#Section 3: Genetics, Cellular and Molecular Biology

One is unequal crossing over, in which recombination happens between different positions on chromosomes that are misaligned during meiosis. 

Another is replication slippage, in which the DNA polymerase loses its place and copies a segment of chromosome twice.