Cells and Cellular Processes Check-in Questions: THESE Questions are NOT meant to
be an exhaustive list of questions from this topic! These questions are meant for you
to practice on how to approach assessments for this course! (There are no review
questions here about organelles and Chapter 6 here!)
MITOSIS AND CELL REGULATION PROBLEMS
1. What are the functions of cell division? Why is it necessary? What does it
accomplish? Over all, what are the two parts of cell division? What does each
accomplish? In particular, why does mitosis have to be so complicated?
2. What happens in cytokinesis? Describe the similarities and differences in
cytokinesis in plant and animal cells.
3. What are cell cycle checkpoints? What do they do, and why are they
necessary? How do cyclins and Cdk’s work?
4. What regulates the cell cycle? What are some examples of internal and
external cues that regulate the cell cycle? Make sure you talk about densitydependence and anchorage-dependence.
WATER POTENTIAL PROBLEMS
5. What is the solute potential Ψs of a 1.0M sugar solution at 22 degrees Celsius
under standard atmospheric conditions?
6. Zucchini cores are measured and determined to have a sucrose
concentration of 0.36 M. Calculate the solute potential Ψs of these cells.
(Temperature is same as question #1.) Will water go in or out of the plant
cell?
Plant cell
7. If solute potential in a plant cell is –6.25 bars and pressure potential is 0,
what is water potential of the plant cell? What does this indicate in terms of
water movement?
8. If solute potential in the plant cell in question 6 is –6.25 bars and pressure
potential is 6.25 bars, what is the water potential of the plant cell? What
does this indicate in terms of water movement?
9. Which of the following would be inhibited by a drug that specifically blocks the
addition of phosphate groups to proteins?
A) G protein-coupled receptor signaling
B) ligand-gated ion channel signaling
C) adenylyl cyclase activity
D) phosphatase activity
E) receptor tyrosine kinase activity
10. In which of the following ways could signal transduction most probably be
explored in research to treat cancer?
A) removal of serine/threonine phosphate acceptors from transduction pathways
in colon pre-cancerous growths
B) alteration of protein kinases in cell cycle regulation in order to slow cancer
growth
C) increase in calcium ion uptake into the cytoplasm in order to modulate the
effects of environmental carcinogens
D) expansion of the role of transduction inhibitors in the cells before they give
rise to cancer
E) increase in the concentration of phosphodiesterases in order to produce more
AMP