Stuff on the Bio Test Flashcards

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1
Q

Cells dividing uncontrollably

A

Cancer

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2
Q

Division of prokaryotes is called

A

binary fission

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3
Q

Simple steps to binary fission

A

Duplication of the chromosome and separation of the copies. These copies then divide

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4
Q

How does binary fission compare to mitosis

A

Binary fission occurs primarily in prokaryotes (bacteria), while mitosis only occurs in eukaryotes

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5
Q

Why do cells divide

A

Growth, repairing, and reproduction

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6
Q

The first checkpoint of the cell cycle does what

A

Checks the integrity of the DNA

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7
Q

Second checkpoint does what

A

Proper chromosome duplication is assessed at checkpoint 2

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8
Q

Third checkpoint does what

A

Assess the attachment of kinetochore to a spindle fiber

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9
Q

Entire complex consisting of roughly the same amount of DNA and protein

A

Chromatin

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10
Q

One of the two identical parts of a duplicated chromosome in a eukaryotic cell

A

SIster chromatids

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11
Q

What holds the sister chromatids together

A

Centromere

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12
Q

(of a cell or nucleus) having a single set of unpaired chromosomes.

A

haploid

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13
Q

What tumors don’t leave the original site

A

Benign

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14
Q

tumors are mass of abnormally reproducing cells that can spread and invade other healthy organs of the body

A

Malignant

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15
Q

If the cancer cells spread it is called

A

METASTASIS

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16
Q

ANGIOGENESIS

A

Cancer cells can signal blood vessels to grow to them by releasing chemicals

17
Q

Use chemical to kill cancer cells that are dripped in an IV.

A

chemotherapy

18
Q

Using intense radiation (UV rays) and locally zapping the cancer cells.

A

radiation

19
Q

Antibodies (Proteins)

A

immunotherapy

20
Q

How many autosomes are found in the human sperm cell?

A

22 chromosomes in a gamete (23 because they’re a haploid)

21
Q

Which are identical? Sister chromatids or homologous chromosomes? Explain.

A

Sister chromatids are identical copies of the same chromosomes. Homologous have the same genetic information coded on them but the coding itself doesn’t have to be the same

22
Q

(of a cell or nucleus) containing two complete sets of chromosomes, one from each parent.

A

Diploid

23
Q

Chromatin what exactly does it do?

A

Contains the DNA which is an instruction booklet of the cell

24
Q

Chromatin isn’t just DNA. It has proteins that are “shelves” What are these “shelves” called?

A

Histones

25
Q

DNA is found in 2 forms: smaller circular pieces = plasmids and large loop = nucleiod

A

Prokaryotic DNA

26
Q

Nuclear DNA and DNA found in other membrane-bound organelles: mitochondria and chroloplasts
much more DNA than prokaryotes

A

Eukaryotic DNA

27
Q

Cell copies DNA and prepares for division

A

Interphase

28
Q

chromosomes are visible
centrioles migrate to the poles
Nuclear membrane disappears
nucleolus disappears
spindle forms

A

prophase

29
Q

Chromosomes line up on the equator

A

metaphase

30
Q

chromatids separate and move to opposite poles pulled by spindle

A

anaphase

31
Q

chromosomes disappear
nuclear membrane reforms
nucleoli reappears
spindle disappears
centrioles duplicate

A

telophase

32
Q

division of the cytoplasm to form 2 new daughter cells

A

cytokenisis

33
Q

How many chromosomes does a cell have after mitosis

A

46

34
Q

After meiosis how many chromosomes will a cell have

A

23