WCU PHYS 261 EXAM SCRIPT VERIFIED QUESTIONS AND SOLUTIONS COMPLETE REVIEW MATERIAL

WCU PHYS 261 EXAM SCRIPT VERIFIED
QUESTIONS AND SOLUTIONS COMPLETE
REVIEW MATERIAL

●● Interphase
Answer: - normal metabolic functions
- not part of mitosis
- 3 stages (G1, S, G2)


●● 3 Stages of Interphase
Answer: G1 - centrioles begin replicating
S - DNA is replicated
G2 - centrioles finish replicating


●● Early Prophase
Answer: - chromatin condenses
- sister chromatids held together by centromere
- mitotic spindle (centrosomes)


●● Late Prophase
Answer: - nuclear envelope breaks up

,- chromosomes drawn to the middle of the cell


●● Metaphase
Answer: - chromosomes line up at the equator
- enzymes separate the chromatids


●● Anaphase
Answer: - shortest phase
- centromeres split
- chromatids -> chromosomes
- microtubules pull chromosomes to poles


●● Telophase
Answer: - prophase in reverse
- chromosomes uncoil -> chromatin
- new nuclear envelope forms
- spindle breaks down
- end of mitosis


●● Cytokinesis
Answer: - actin microfilaments forms cleavage furrow
- division of cytoplasm

, ●● Molecular motion
Answer: - random and erratic
- kinetic energy


●● passive transport
Answer: movement driven by concentration/pressure differences
- equalizes gradient


●● active transport
Answer: cell provides energy to power movement


●● Diffusion
Answer: movement of molecules from region of higher concentration to
lower concentration
- driving force is kinetic energy


●● potential energy
Answer: stored energy
(molecules want to move with the concentration gradient = high
potential energy)


●● simple diffusion