In the "pulse-chase" experiment, palade and colleagues studied the pathway taken by newly secreted proteins in pancreatic acinar cells by labeling them with radioactive amino acids, removing unused label, and determining their location within the cells at various time points. which sequence represents the correct order in which the proteins were identified?
a. secretory vesicles → golgi apparatus → rough er → nucleus
b. golgi apparatus → rough er → nucleus → secretory vesicles
c. rough er → golgi apparatus → secretory vesicles
d. rough er → secretory vesicles → golgi apparatus

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

Read this summary of a scientific theory: "cells are the most basic structural and functional units of life. all living organisms are made up of one or more cells. all cells that are alive in the world today came from pre-existing cells." which of the following would require this theory to be modified? -a.) a survey finds that a majority of people believe viruses carry out the basic processes of life. -b.) a prominent scientist says she feels strongly that one day the theory will be challenged by life on other planets. -c.) the dna of unicellular and multi-cellular organisms is shown to have many fundamental similarities. -d.) scientific observations show that microscopic organisms living in the deep ocean are not made up of cells.