BIOL 1201 Lecture Notes - Lecture 19: Interphase, G1 Phase, Cytokinesis

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skycamel466

23 Nov 2015

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End of life of one cycle and beginning of life for another: g1. Chromosomes are unreplicated: s (synthesis, the dna in the cell replicates, still have same # of chromosomes but 2x dna, g2. The two don"t occur together and occur through completely different mechanisms: mitosis. A cell containing 7 picograms could be in which stage(s) of the cell cycle: g1, s, g2, more than one of the above. A cell containing 7 picograms would most likely be in which stage(s) of the cell cycle: g1, s, g2, more than one of the above. Ex: human somatic (body) cells contain between 7 and 14 picograms of dna. A cell containing 9. 5 picograms would most likely be in which stage(s) of the cell cycle: g1, s, g2, more than one of the above. Stages: prophase, nuclear envelope breaks down, spindle apparatus forms, chromosomes condense and are attached to the spindle (aka prometaphase, these are 4 replicated chromosomes (8 molecules of, metaphase.

Related Questions

A cell in G1 of interphase has 12 chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the following stages?
....G2 of interphase, Metaphase I of meiosis, Prophase of mitosis, Anaphase I of meiosis, Anaphase II of meiosis, Prophase II of meiosis, After cytokinesis following mitosis, and After cytokinesis following meiosis II.

**If you wouldn't mind, please arrange them in chronological order that it happens in the process so it's easier to understand, thanks**

coppercrab413

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

amethystyak657

Suppose that a cell in G1 contains 10 picograms (pg) of DNA. How many picograms would you expect to find in this same cell during G2?

Note that a picogram (pg) is a measured quantity/mass. Think about how the amount of DNA changes as the cell progresses from G1 to G2.

Suppose that a single somatic cell undergoes mitosis and cytokinesis. If you compared the original parent cell in G1 with the daughter cells that are produced, which of the following statements would be true?

_____________________

The daughter cells have the same number of chromosomes and half the amount of DNA.

The daughter cells have half the amount of cytoplasm and half the amount of DNA.

The daughter cells have half the number of chromosomes and half the amount of DNA.

The daughter cells have the same number of chromosomes and the same amount of DNA.

The daughter cells have the same number of chromosomes and twice the amount of DNA.

BIOL 1201 Lecture Notes - Lecture 19: Interphase, G1 Phase, Cytokinesis

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