click below
click below
Normal Size Small Size show me how
BellaireBio9Unit9/10
Bellaire Bio9 Unit 9/10 Cell Division and Protein Synthesis
| Question | Answer |
|---|---|
| amino acid sequence | In every protein molecule, the specific order of the subunits (aminio acid)in the chain |
| cancer | the diseases with which abnormal cells divide uncontrollably. These cells have the ability to 'invade' tissue in the body and are spread through the blood and lymph system |
| carcinogenic | A chemical agent that causes cancer |
| chromosome | a threadlike, gene-carrying structure found in the nucleus. Each chromosome consist of one very long DNA molecule and associated proteins |
| chromosome pair (homologous chromosomes) | One homologous chromosome is inherited from the organism's father, the other from the mother |
| Chromatids | either of the two strands of a replicated chromosome, which are joined at the centromere |
| complementary sequence | the matching sequence of bases when copying nucleic acid. Uses the following rules: adenine and thymine in DNA, adenine and uracil in RNA, and guanine and cytosine in both |
| crossing over | the reciprocal exchange of genetic material between nonsister chromatids during synapsis of meiosis I |
| degreen of kinship | how closely related two organisms are to each other |
| deletion | (1) a deficiency in a chromosome resulting from the loss of a fragment throughbreakage (2) a mutational loss of a nucleotide from a gene |
| diploid | a cell containing two sets of chromosomes (2n), one set inherited from each parent |
| DNA replication | The process of making a copy of DNA |
| DNA sequence | In every DNA molecule, the specific order of the subunits (nucleotides) in the chain |
| double helix | The form of DNA. refering to its two adjacent strands wound into a spiral shape |
| gametes (sex cells) | A haploid egg or sperm cell; gametes unit during sexual reproduction to produce a diploid zygote |
| gene | A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some viruses) |
| genetic diversity | The variation within species which allows populations to adapt to changes in climate and other local environmental conditions. |
| genetic mutation | A rare change in the DNA of genes that ultimately creates gentic diversity |
| genetic variation | a measure ofthe genetic differences there are within populations or species |
| haploid | a cell containing only one set of chromosomes (n) |
| inherited trait | this is the process by which an offspring cell or organism acquires the characteristics of its parent cell or organism |
| jumping genes (transposons) | sequences of DNA that can move around positions within the genome of a a single cell, a process called transpotion. In the process, they can cause mutations and change the amount of DNA in the genome |
| karyotype | a method of organizing the chromosomes of a cell in relation to number, size, and type |
| meiosis | a two-stage type of cell division in sexually reproducing organisms that results in gametes with half the chromosome number of the original cell |
| messenger RNA (mRNA) | a type of RNA synthesized from DNA in the genetic material that attaches to ribosomes in the cytoplasm and specifies the primary structure of a protein |
| mitosis | az process of cell division in eukeryotic cells; it conserves chromosome number by equally allocating replicated chromosomes to each the the daughter nuclei. |
| nucleotide | The building block of a nucleic acid, consisting of a five-carbon sugar covently bonded to a nitrogenous base and a phosphate group |
| progeny | a gentic descendant or offspring |
| protein structure | the unique three dimensinal arrangement of a protein. Is the "fingerprint" of each protein |
| proteirn sunthesis | the process of making proteins |
| ribosome | the cell organelle constructed in the nucleolus, functioning as the site of protein synthesis in the cytoplasm |
| sex chromosomes | the pair of chromosomes responsible for determining the sex of an individual |
| transcription | the synthesis of RNA on a DNA template |
| transfer RNA (tRNA) | an RNA molecule that functins as an interpreter between nucleic acid and protein language by picking up specific amino acids and recognizing the appropriate codons in the mRNA |
| translation | the synthesis of a polypeptide (protein), using the genetic information in an mRNA molecule. There is a change of "language" from nucleotides to amino acids. |