Assignment: The Effect of low pH on Enzyme Activity Design an experiment in which you will test the effect of an acidic fluid on enzymatic activity. Recall: enzymes are proteins! To complete this project, it may be useful for you to first review the Scientific Method Tutorial, information about pH […]

The rough ER is the site of synthesis of many different classes of membrane protein. Some of these proteins remain in the ER, whereas others are sorted to compartments such as the Golgi apparatus, lysosomes, and the plasma membrane (PM). One measure of the difficulty of the sorting problem is […]

Q1. Johnny, a five-year-old boy has been growing by leaps and bounds; his height is 100 percent above normal for his age. He has been complaining of headaches and vision problems. A CT scan reveals a large pituitary tumour. What hormone is being secreted in excess? What condition will Johnny […]

G-protein-linked receptors activate G proteins by reducing the strength of GDP binding. This results in rapid dissociation of abound GDP, which is then replaced by GTP, which is present in the cytosol in much higher concentrations than GDP. What consequences would result from a mutation in the alpha subunit of […]