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biology > CH 12 > Flashcards

CH 12 Flashcards

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0
Q

Prokaryotes divide by binary vision

A

just a statement

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1
Q

Cell division functions in growth, replacement , repair and Asexual reproduction

A

just a statement

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2
Q

The Genome of Eukaryotes is organized into multiple chromosomes.

A

Just a statemenmt

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3
Q

The cell cycle: Mitosis alternates with interphase

A

Just a statement

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4
Q

Cytokinesis divides the cytoplasm

A

just a statement

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5
Q

Mitosis (Eukaryotes) may have evolved from binary vision

A

just a statement

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6
Q

A molecular control system drives the cell cycle

A

Just a statement

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7
Q

External and internal cues help regulate cell division

A

just a statement

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8
Q

Cancer cells escape controls on cell division

A

just a statement

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9
Q

define Genome

A

A cells endowment of DNA. its genetic info

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10
Q

Define Chromatin

A

Together , the entire complex of DNA and proteins tht is the building material of chromosomes

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11
Q

Define somatic cells

A

All body cells except the reproductive cells

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12
Q

Define Gametes

A

Reproductive cells, eggs and sperm

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13
Q

Define sister chromatids

A

Joined copies of the original chromosomes .

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14
Q

Define centromere

A

a region of the chromosomal DNA where the chromatid is attached ,ost closest to its sister chromatid

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15
Q

Define Mitosis

A

The division of the genetic material in the nucleus .

16
Q

Define Cytokinesis

A

The division of the cytoplasm

17
Q

Define spindle

A

Consists of fibers made of microtubules and associated proteins

18
Q

What are the five stages of Mitosis

A 
Interphase - G1, S , G2
Prophase 
Prometaphase
metaphase
anaphase
telophase/ cytokinesis
19
Q

At what specific phase is the DNA condensed, diffused, and replicated?

A

G1 - chromosomes or DNA are diffused
S - Chromosomes or DNA are replicated
G2 - Chromosomes are condensed

20
Q

The process of mitosis

A

Interphase
G1- No change in DNA
S - DNA Replicated
G2 - Centromeres replicated
Prophase - Chromosomes move apart and spindle forms
Prometaphase - Nuclear envelope breaks down. spindles still form, microtubules attach to chr. through kinetochore. Chr begin to line up.
Metaphase - All chr are lined up at the metaphase plate between the 2 spindle poles as the spindle still forming.
Anaphase - Chr break from the metaphase plate, split one to each end, spindle still forming
Telophase - Chr to chromatin, reform nuclear env., spindle breaking down
Cytokinesis - Break down rest of cell, actin filaments pinch cytoplasm, cleavage furrow pinches the cell of into 2 cells (like a belt )

biology (13 decks)

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