MCB 150 Lecture Notes - Lecture 35: Chromatin, Nuclear Localization Sequence, Lipid Bilayer

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chocolateyak138

24 Apr 2017

School

University of Illinois

Department

Molecular and Cell Biology

Course

MCB 150

Professor

Brad Mehrtens

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Document Summary

04/22: list the stages of m-phase and describe the events occurring in each stage, explain the breakdown and reformation of the nucleus during mitosis, compare and contrast anaphase a and anaphase b. Spindle apparatus begins to form, and polar microtubules overlap each other: prometaphase: nuclear envelope disintegrates. Microtubules attach to the kinetochores of chromosomes and being moving them to the middle of the spindle: metaphase: all chromosomes are positioned in the middle of the spindle. The spindle is anchored to the cell membrane by astral microtubules: anaphase: sister chromatids are pulled apart by the disassembly of kinetochore microtubules at the kinetochore. The spindle poles are moved farther apart to fully separate the replicated chromosomes: telophase: daughter chromosomes are fully separated and are clustered at opposite poles of the spindle. Nuclear envelope forms around each set and the chromosomes de-condense. In most cells, mitosis is followed by cytokinesis division of all cell contents.

Related Questions

Part A:

In prokaryotes and eukaryotes cell reproduction is similar in that it requires some kind of signal to proceed, DNA replication, careful separation of the DNA into two equal portions, and division of the cytoplasm. How is cell reproduction different in prokaryotes and eukaryotes?

Select one:

a. In a eukaryotic organism, the signals for cell division are usually not related to the environment but to the function of the entire organism.

b. Eukaryotic cells constantly divide whenever environmental conditions are adequate and the cells are large enough.

c. The linear chromosomes in prokaryotes are constantly being updated.

d. Prokaryotic cell division requires cytokinesis before mitosis because of their small size.

e. The sexual phase of most prokaryotes (bacteria) is essential to the rapid cell division required for infection.

Part B:

What does the name Cyclin Dependent Kinase stand for?

Select one:

a. A protein important to the cell cycle that is dependent on DNA synthesis.

b. An enzyme that cuts DNA so that chromosomes can segregate.

c. An enzyme that phosphorylates other proteins using ATP only when the protein Cyclin is bound to the enzyme.

d. An enzyme that rolls along microtubules dragging a vesicle.

e. An enzyme that connects chromosomes to the spindle fiber.

Part C:

The Cell Cycle is divided into Mitosis, Cytokinesis, and Interphase. Mitosis can be ordered into the following phases:

Select one:

a. Prophase/Prometaphase/Metaphase/Anaphase/Telophase

b. Anaphase/Prometaphase/Metaphase/Prophase/Telophase

c. Metaphase/Anaphase/Telophase/Prophase/Prometaphase

d. Telophase/Prophase/Prometaphase/Metaphase/Anaphase

e. Anaphase/Telophase/Prophase/Prometaphase/Metaphase

Part D:

The Cell Cycle is divided into Mitosis, Cytokinesis, and Interphase. Interphase can be ordered into the following phases:

Select one:

a. S/G1/G2

b. G2/G1/S

c. G1/S/G2

d. G2/S/G1

e. G1/G2/S

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MCB 150 Lecture Notes - Lecture 35: Chromatin, Nuclear Localization Sequence, Lipid Bilayer

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