Which pathway supplies materials to lysosomes and is used to degrade obsolete parts of the cell

23. In which site in the cell does a radiolabeled secretory protein first appear when tissue is incubated briefly with radioactive amino acids? a. SER b. Golgi apparatus  c. RER d. secretory vesicles  e. nucleus

Lysosomes are involved in the following: a. Na-K-ATPase Protein Pump O b. Phagocytosis O c. Pinocytosis d. Exocytosis Oe. All of the Above

Cells that line the intestines move nutrients from the intestines through the cell and then to the blood stream. These cells have many folds along their plasma membrane called microvilli. What is the function of these folds? O A. increase the volume of the cell O B. increase the surface area of the cell O C. increase protein transport out of the cell D. increase the ATP production within the cell red MacBook Air 吕口 F3 D00 F4 F7 F2 % & 2 3 5 6 %244

What is the function of tight junctions? a. To allow cells to move b. To keep cells from moving c. To seal neighboring cells together and prevent leakage of d. extracellular molecules† e. To keep cancer cells together, forming a tumor

Where in the cell does translation occur?   A. Ribosomes in the nucleus   B. Ribosomes on the endoplamic reticulum   C. Ribosomes free-floating in the cytosol   D. both A and B   E. both B and C

During which phase of mitosis do the microtubules in the spindle shorten?   A. prophase   B. metaphase   C. anaphase   D. telophase

Which structure within the cell produces ATP (adenosine triphosphate)? A. the mitochondria B. the nucleus C. peripheral proteins D. the endoplasmic reticulum

which part of the endoplasmic reticulum has proteins made inside it?

Na+ moves from high to low concentration, across the plasma membrane, through a protein channel that is permenantly open. Which statement is true about this process? a. It does not require ATP b. It is a form of active transport  c. Movement is against the concentration gradient of Na+ d. The channel probably allows many different molecules and ions to cross