BIOL 1001 Lecture Notes - Lecture 6: Hydrogen Bond, Deoxyribose, Semiconservative Replication

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lavenderelephant707

20 Oct 2016

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Usually longest part of the mitotic cell cycle. One centriole pair is moved toward opposite pole of spindle. All chromosomes are lined up at the spindle equator. Sister chromatids of each chromosome are pulled apart. Once separated, each chromatid is a chromosome. 2 nuclear membranes form, one around each set of unduplicated chromosomes. Mitosis is over and spindle is now dissembling. Band of microfilaments at the former spindle equator contracts. The contraction continue and cut the cell in 2. Each with same # of chromosome as parent cell. Mitosis allows for growth, devel. , and wound repair in humans. Is a drug that inhibits microtubule formation, and so no mitosis can occur in cells. Is used a lot in producing hybrid plants (orchids) Chromosomes and 50% dna and 50% protein. Histone core of nucleosome contains four different histone proteins x 2 (eight proteins) Dna and proteins arranged as cylindrical fiber. Produced much of x-ray crystallographic data used by watson and crick.

Related Questions

Which of the following is correctly matched?

		Prophase I - Nuclear envelope reforms,nucleolus reappears, spindle apparatus disappears
		Metaphase II - Homologous chromosomes align atthe equator (center) of the cell forming tetrads
		Anaphase II - Sister chromatids are pulled toopposite poles of the cell by contraction of spindle apparatusmicrotubules
		Cytokinesis - Division of the nucleus
		Telophase I - Nuclear envelope fragments,nucleolus disappears, spindle apparatus forms

ivoryspider500

31.????? interphase A. cytoplasm divided between the two daughter cells

32.????? chromosomenumber B. final phase of mitosis; daughter nuclei form

33.????? chromatid C. sum total of chromosomes in all cells of a given

type

34.????? cytokinesis D. chromosomes condense and mitotic spindle

begins to form

35.????? metaphase E. chromosomes line up at spindle equator

36.????? alleles F. sister chromatids separate, move to opposite

spindle poles now

37.????? prophase G. none between meiosis I and II

38.????? telophase H. half of a chromosome in prophase

39. ????? anaphase I. different molecular forms of the same gene

Matching

ultramarineporpoise990

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

BIOL 1001 Lecture Notes - Lecture 6: Hydrogen Bond, Deoxyribose, Semiconservative Replication

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