Questions:
Cell Structure and Function
1. Which of the following organelles is most important in providing energy to the cell?
(a) mitochondrion
(b) centrosome
(c) Nucleus
(d) Peroxisome
2. Name the membrane valves that open and close for potassium efflux and sodium influx.
(a)ion channels
(b)Vacuoles
(c)Capillaries
3. What technique can be used to measure cell activity like a change in membrane potential?
(a) ion channel
(b) Apoptosis
(c) patch clamp
4. When a sodium channel opens and sodium rushes into a myocyte (heart cell), the cell membrane becomes...
(a) Polarized
(b) Depolarized
(c) Paralyzed
5. What role(s) does the cytoskeleton play in a living cell? (Hint: CHECK ONLY ONE ANSWER)
(a) maintaining cell shape
(b) movement
(c) contraction
(d) all of these
6. Name the violent membrane blebbing exhibited by a cell undergoing apoptosis.
(a) Fission
(b) Zeiosis
(c) Necrosis
(d) apoptotic cells do not bleb
7. The animal cell centriole is a ring of how many groups of microtubules?
(a) 9
(b) 12
(c) 36
8. Which is SMALLEST of these four?
(a) bacterium
(b) red blood cell
(c) virus
(d) lymphocyte
9. In what stage of mitosis do all chromosomes align in one plane?
(a) anaphase
(b) telophase
(c) prophase
(d) metaphase
10. A cell in interphase is sometimes said to be resting. Why is this misleading?
(a) interphase cells are actively dividing
(b) interphase cells are synthesizing RNA and proteins, and growing in size