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BIOL 201 > Lec 38 > Flashcards

Lec 38 Flashcards

1
Q

Interphase

A

Organelles double in number or volume

DNA replication

Centrosome replication

Cell elongates (plant cells)

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2
Q

Prophase

A

Centrosomes move to poles

Chromosomes condense

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3
Q

Prometaphase

A

Nuclear envelop is gone

MT connects to targets

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4
Q

Metaphase

A

Chromosomes move to the middle

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5
Q

Anaphase

A

Chromatids separate

Chromosomes move to poles

Cell elongates (animal cells)

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6
Q

Telophase

A

Chromosomes de-condense

Nuclear envelop reforms

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7
Q

Cytokinesis

A

Contractile ring (animal cells)

Vesicles containing cellulose (plant cells)

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8
Q

Chromosome proteins

Histones

A

Balls of eight little proteins

wrapped in DNA

Compacts DNA

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9
Q

Cohesion rings

A

Larger heterotrimer rings made of three polypeptides

Put onto DNA before DNA replication in G1

After DNA replication, they trap chromatids together

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10
Q

Condensins

A

Similar to cohesions

Compacts and condenses DNA during prophase

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11
Q

Kinetochore proteins

A

Allows MTs to connect to centromere DNA

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12
Q

Cellulose

A

Polysaccharide

Cellulose rings allow water in to make the plant cell to expand into a rectangle

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13
Q

Water is always trying to get

A

into plant cells

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14
Q

Intermediate filaments during interphase

A

Allow formation of nucleus

Surrounded by nuclear membrane

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15
Q

IFs during prometaphase

A

Are broken down and deactivated

undone during telophase

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16
Q

Nuclear membrane during prometaphase

A

goes to corner of the cell

undone during telophase

17
Q

Microtubules during prometaphase

A

are named by what they are attached to

18
Q

3 types of MTs

A

Aster Mts- inner surface of plasma membrane

Kinetochore MTs

Interpolar MTs- MTs from opposite pole

19
Q

Kinetochore MTs

A

MTs search for and capture chromosomes and move them to the middle of the cell during metaphase

20
Q

Kinetochore MTs during anaphase

A

Disassemble

21
Q

Aster MTs

A

Anchor centrosomes

22
Q

Interpolar MTs

A

Elongate the cells for animal cells

23
Q

Anaphase A involves

A

Chromosomes being pulled toward centrosomes

using kinetochore MTs

24
Q

Anaphase B

A

Centrosomes move apart

Done by interpolar MTs and Aster MTs

25
Q

MTs during cytokinesis in plant cells

A

interpolar MTs are involved

26
Q

Actin filaments

A

form ring for cytokinesis in animal cells

they are guided by interpolar MTs

BIOL 201 (44 decks)

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