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Science -Lim > cell division flashcards > Flashcards

cell division flashcards

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1
Q

what is the smallest unit of life

A

cell

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2
Q

what is the biggest organelle of a eukaryotic cell

A

a nucleus

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3
Q

what is found in the nucleus

A

DNA

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4
Q

what is DNA and what does it stand for

A

DNA contains genetic material and it stands for DEOXY RIBO NUCLEIC ACID

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5
Q

what dose DNA look like inside a nucleus

A

DNA looks like a double stranded of ladder and jumble up like a ball of yarn

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6
Q

what is genetic material

A

genetic material are genes or traits that can be passed on from parents to offspring

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7
Q

how does DNA grow and develop and reproduce

A

DNA reproduce through stages called INTERHASE AND MITOSIS

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8
Q

what happens during INTERPHASE

A

INTERPHASE is when DNA develops and goes through replication

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9
Q

what does REPLICATION mean

A

copy or duplicate

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10
Q

what happens during REPLCATION

A

DNA replicated itself and wrap up tightly and neatly into chromatid

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11
Q

what is a chromatid

A

a DNA that is nearly wrap up

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12
Q

what is a chromosome

A

when DNA wraps around a protien,it is called a chromosome

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13
Q

how many chromosomes do humans have

A

humans have 46 chromosomes

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14
Q

how many chromosomes does each parent pass on to their offspring

A

23 chromosomes from each parent

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15
Q

each segment of DNA is known as a what

A

gene

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16
Q

what does a gene contain

A

genetic traits

17
Q

what happens during mitosis

A

during mitosis,chromosomes go through 5 phases

18
Q

what are 5 phases of mitosis

A

prophase, metaphase ,anaphase , telophase cytokinesis

19
Q

what happens during each phase

A

prophaes chromosomes appear

20
Q

what happens during each phase

A

metaphase -chromosomes line up

21
Q

what happens during each phase

A

anaphase chromosomes separate

22
Q

what happens during each phase

A

telphase chromosomes pinch

23
Q

what happens during each phase

A

cytokinesis- two new daughter cells from

24
Q

how many chromosomes do humans sex cells have

A

23 chromosomes in each sex cells (egg and sperm)

25
Q

how many chromosomes do humans body cells have

A

46 chromosomes in each cell

26
Q

what do you call a cell with a full set of chromosomes (46)?

A

a diploid cell

27
Q

what do you call a cell with half set of chromosomes (23)?

A

a haploid cell

28
Q

do bacteria cells go though mitosis like the eukaryotic cells

A

no, bacteria do not have nucleus

29
Q

how do bacteria cells divide

A

bacteria cell split in half called binary fission

30
Q

why do our body cells divide

A

our body cells divide to replace dead cells, to grow, to develop

31
Q

what is the name of the DNA backbone called

A

sugar phosphate

32
Q

name all 4 of the DNA bases

A

guamine, cytosine, thymine, adenine

33
Q

what DNA base pairs with thymine? and guanine?

A

guanine= cytosine thymine= adenine

Science -Lim (2 decks)

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