chapter 4 test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is Mitosis | the process in which the necleus divides into 2 indentical nuclei and it includes interphase metaphase ananphase and telophase
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| what is a chromosome | a structure in a cells nucles that contains heredity material
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| what is asexual reproduction | a type of reporduction that a new organism is made by just one parent organism types or asexual reproduction are budding fission and regeneration
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| what are the stages of the cell cycle | interphase, prophase, metaphase, anaphase, and telophase
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| true or false the speed of the cell cycle is different for every type of cell | true
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| true or false chromatin is a long thing strand that looks like spaghetti | true
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| what is a chromosome | DNA that is coiled up into shortened sections and appears thicker
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| what is a chromatid | one strand of the duplicated chromosome
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| what and where is the centromere | the centormere is the "button" that holds the chromosome together and it is usually located in the middle of the two chormatids
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| what are the centrioles | an organe that produces spindle fibers which pulls the chromatids apart
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| what happens in interphase | the cell grows and developes, the cell does its job and the DNA copies itself
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| what happens in prophase | the nuclear membrane and nucleolus disappear, centrioles move to oppsite sides of the cell, spindle fibers start to grow and chromatids pair up
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| what happens in metaphase | chromatids line up in middle of cell, spindle fibers attach to cemtromeres
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| what happens in anaphases | spindle fibers start to shorten
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| what happens in telophase | spindle fibers disappear, nuclear membrane and nucleolus reappear, cell membrane pinches in, chromosomes unravel
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| what is fission | the reproduction or bacteria
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| what is budding | an identical organism grows off the parent {ex hydra}
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| what is regeneration | an indentical organism grows from a piece of the parent
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| what is DNA | deoxyribonucleic acid, the gnetic material of all organisms made up of 2 twisted strands of super, phosphate, molecules and nitrogen bases
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| what is a gene | section of DNA on a chromosome that contains instuctions for making specific proteins
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| what is RNA | ribonuleic acid, a type or nuleic acid that carries codes for making proteins from the nucleus to the ribosomes
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| what is a mutation | any permanent change in a gene or chromosome can be benefical harmful or have little effect on the organism
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| true or false DNA is a blueprint for all living things | true
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| True or false DNA is a very small molecule | false
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| what does mRNA stand for | messanger RNA
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| what are the similarities of DNA and RNA | phosphates, adenine, guanine, cytosine
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| what are the differences in DNA and RNA | DNA has 2 strands RNA has 1 and DNA has thymine but RNA has uracil
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| how does DNA replicate | a gene untwists a little, unzips a little, nucleolicles fill in
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