Term
| adenine, cytosine, guanine, thymine |
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Definition
| nucleotides in DNA and RNA |
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Term
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Definition
| the three-nucleotide sequence of tRNA which base-pairs with the mRNA codon |
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Term
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Definition
A=T and G=C in DNA
(adenine=thymine and guanine=cytosine) |
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Term
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Definition
| the portion of the mRNA that will be expressed |
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Term
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Definition
| the enzyme that "unzips" DNA for replication or mRNA synthesis to begin |
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Term
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Definition
| protiens that DNA is coiled around in eukaryotes |
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Term
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Definition
| the nucleotides which have a two-ring structures in the nitrogenous base |
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Term
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Definition
| the codons in DNA and mRNA which signal that the protien is completed |
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Term
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Definition
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Term
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Definition
| transfer RNA. responsible for bringing the appropriate amino acids to the ribosome for polypeptide assembly. |
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Term
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Definition
| the nucleotide found in RNA which contains the nitrogenous base uracil |
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Term
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Definition
| prophase, prometaphase, metaphase,anaphase, telophase |
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Term
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Definition
| the cell spends about 90% of its time in interphase. it makes antiodies, absorbs nutrients, and sythesizes hormones. |
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Term
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Definition
| the first stge of mitosis. the nucleoli begin to disapear and the DNA beins to condense and become visible. microtubules begin to extend out from each centriole in a star-like pattern, beginning to form a spindle. |
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Term
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Definition
| the spindle fully forms and attaches to the centromere of each pair of sister chromatids. the nuclear membrane disinagrates. chromosomes condense completely. |
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Term
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Definition
| chromosomes line up completely along equator of cell so each daughter cell will only recive one copy of each chromosome. |
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Term
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Definition
| the sister chromatids are pulled apart due to the action of the spindle. the chromosomes move to opposite poles of the cell. ends with one set of sister chromatids. |
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Term
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Definition
| two cells form from one. the center of the membrane pinches and the cells break apart. the daughter cells then go back and begin interphase. |
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Term
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Definition
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Term
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Definition
I: chromosomes separate
II: sister chromatids are pulled apart |
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Term
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Definition
| cells that have paired chromosomes (2n) |
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Term
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Definition
| contains only one copy of chromosomes (1n) |
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Term
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Definition
| the cell formed when chromosomes are fused |
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