PHYS 261 - Lab Final Practicum QUESTIONS WELL ANSWERED TO PASS

PHYS 261 - Lab Final Practicum
QUESTIONS WELL ANSWERED TO
PASS

What are the phases of mitosis? - correct answer ✔✔ interphase, early prophase, late
prophase, metaphase, anaphase, telophase, cytokinesis



Interphase - correct answer ✔✔ - normal metabolic functions

- not part of mitosis

- 3 stages (G1, S, G2)



3 Stages of Interphase - correct answer ✔✔ G1 - centrioles begin replicating

S - DNA is replicated

G2 - centrioles finish replicating



Early Prophase - correct answer ✔✔ - chromatin condenses

- sister chromatids held together by centromere

- mitotic spindle (centrosomes)



Late Prophase - correct answer ✔✔ - nuclear envelope breaks up

- chromosomes drawn to the middle of the cell



Metaphase - correct answer ✔✔ - chromosomes line up at the equator

- enzymes separate the chromatids

, Anaphase - correct answer ✔✔ - shortest phase

- centromeres split

- chromatids -> chromosomes

- microtubules pull chromosomes to poles



Telophase - correct answer ✔✔ - prophase in reverse

- chromosomes uncoil -> chromatin

- new nuclear envelope forms

- spindle breaks down

- end of mitosis



Cytokinesis - correct answer ✔✔ - actin microfilaments forms cleavage furrow

- division of cytoplasm



Molecular motion - correct answer ✔✔ - random and erratic

- kinetic energy



passive transport - correct answer ✔✔ movement driven by concentration/pressure differences

- equalizes gradient



active transport - correct answer ✔✔ cell provides energy to power movement



Diffusion - correct answer ✔✔ movement of molecules from region of higher concentration to
lower concentration

- driving force is kinetic energy