A) Proteins cyclins and cyclin-dependent kinases are responsible for advancing a cell through the phases.
B) G2 checkpoint which checks for DNA damage, determines if all of the DNA is replicated.
C) Metaphase checkpoint which determines if all chromosomes are attached to the spindle apparatus.
D) Cytokinesis which involves the formation of cleavage furrow to separate the cells.
E) The restriction point determines if conditions are favorable for cell division.
G) C) and D)
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D
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A) DNA can form covalent bonds with histone proteins.
B) negative charges on DNA are attracted to positive charges of the histone proteins.
C) the histone tails wrap tightly around the DNA double helix.
D) the amino acids of histone proteins are largely acidic, while DNA molecules are basic.
E) histone H1 tightens the coils of DNA that are wrapped around the nucleosome.
G) C) and D)
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B) False
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A) heterochromatin is converted to euchromatin.
B) chromosomes are about 30 nm wide.
C) chromosomes are much shorter than they were in interphase.
D) chromosomes undergo gene transcription.
E) the "beads on a string" structure is visible.
G) C) and D)
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A) Klinefelter syndrome.
B) Turner syndrome.
C) Down syndrome.
D) Polyploid syndrome.
E) Edward syndrome.
G) A) and D)
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A
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A) G1
B) G2
C) S
D) M
E) meta-
G) None of the above
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C
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A) allotriploid.
B) allotetraploid.
C) allohexaploid.
D) alloheptaploid.
E) allonanoploid.
G) B) and E)
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A) Triple X syndrome
B) Down Syndrome
C) Edward Syndrome
D) the Turner syndrome
E) Klinefelter Syndrome
G) A) and B)
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A) alloploid
B) euploid
C) trisomic
D) polyploid
E) monosomic
G) C) and D)
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A) chromosomes are repelled from each other by their negative charges.
B) they all have a specific chromosome territory that is determined by the nuclear matrix.
C) the histone tails of the nucleosomes are repelled from each other by their negative charges.
D) the chromosomes are highly compacted by the formation of radial loop domains.
E) localized regions of the chromosomes are heterochromatic.
G) D) and E)
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