Aradioactively labeled protein is made by cells and followed through the various organelles in the secretory pathway. after six hours, all of the radioactivity is still primarily in the golgi apparatus. this suggests that the:

a) protein was not translated by the ribosomes.
b) protein does not possess a signal peptide for localization within the lumen of the rough endoplasmic reticulum.
c) protein possesses a signal for localization within the golgi apparatus.
d) all of the above

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed