Chapter 7- Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 2) a permanant alteration in an organisms DNA3) The region of a gene (or mRNA) that codes for a protein in eukarotic cells.5) An enzyme coded for by a gene that is sometimes active and sometimes inactive6) two adjacent pyrimidines bonded together in a DNA strand, usually as a result of exposure to ultraviolet rays7) A mutation that occurs in the absence of any agen known to cause changes in DNA; usually caused by errors during DNA replication8) an enzyme that cuts DNA at precise base sequenses 9) a chemical mutagen that can be inserted between bases of the DNA double helix, causing frameshift mutation12) The transmition of genetic traits from an organism to its progeny15) A sequence of closely associated genes that includes both structural genes and regulatory sites that control transcription17) Mechanism for repair of damaged DNA by several enzymes taht do not require light for activation; they excise defective nucleotide sequences and replace them with DNA complementary to the unaltered DNA strand. 18) Light rays, such as X-rays and ultra violet rays, that can act a mutagens.19) a chemical mutagen similar in molecular structure to one of the nitrogenous bases found in DNA that causes point mutations20) A linear sequence of DNA nucleotides that form a functional unit within a chromosome or plasmid24) also called end-product inhibition - Regulation of a metabolic pathway by the concentration of one of its intermediates or, typically, its end product, which inhibits an enzyme in the pathway.26) Process by which the presence of a preferred nutirent (often glucose) represses the genes coding the enzymes used to metabolize some alternative nutrient28) an enzme that joins together DNA segments31) (also called light repair) Repair of DNA dimers by a light-activated enzyme.32) The synthesis of RNA from a DNA template34) A type of RNA that carries the information from DNA to dictate the arrangement of amino acids in a protein. 45) the location of a gene on a chromosome.46) in an operon it is the protein that binds to the operator, thereby preventing transcription of adjacent genes48) (also called intervening region) Region of a gene (or mRNA) in eukaryotic cells that does not code for a protein. Across: 1) DNA used as a pattern for the synthesis of a new nucleotide polymer in replication or transcription4) A chemical mutagen that can add alkyl groups (-CH3) to DNA bases, altering their shapes and causing errors in base pairing9) The opposite head to tail arrangement of the two strands in the DNA double helix. 10) (also called a terminator _____) A set of three bases in a gene (or mRNA) that does not code for an amino acid.11) mutation in which one base is substituted for another at a specific location ini a gene.13) the synthesis of protein from information in mRNA14) an enzyme found in retroviruses that copies RNA into DNA16) The new strand of DNA formed in short, discontinuous DNA segments during DNA replication21) The science of heredity, including the structure and regulation of genes and how these genes are passed between generations22) the promoter and operator regions of an operon23) One of the short, discontinuous DNA segments formed on the lagging strand during DNA replication.25) A substance that binds to and inactivates a repressor protein.27) replication in which a new DNA double helix is synthesized from one strand of parent DNA and one strand of new DNA 29) Mechanism by which the presence of a particular metabolite represses the genes coding for enzymes used in its synthesis.30) An enzyme that moves along behind each replicationi fork, synthesizing new DNA strands complementary to the original ones.33) a technique used to transfer colonies from one medium to another35) Mutation resulting from the deletion or insertion of one or more bases.36) A sequence of three bases in mRNA that specifies a particular amino acid in the translation process37) An enzyme that removes segments of DNA38) a mechanism whereby the genes coding for enzymes needed to metabolize a particulary nutrient are activated by the presence of that nutrient.39) (also called terminator ______) The last _____ to be translated in a molecule of mRNA, causing the ribsome to release from the mRNA40) An enzyme that is synthesized continuously regardless of the nutrients available to the organism41) An enzyme that binds to one strand of exposed DNA during transcription and catalyzes the synthesis of RNA from the DNA template42) Formation of new DNA molecules43) a cancer producing substance44) A test to determine that resistance to chemical substances occurs spontaneously rather than being induced.47) a technique that rapidly produces a billion or more identical copies of DNA fragment without needing a cell49) a gene that carries information for the synthesis of a specific ploypeptide50) a site at which the two strands of DNA double helix seperate during replication and new complementary DNA strands form51) the removal of one or more nitrogenous bases from DNA, usually producing a frameshift mutation52) a mutation produced by agents called mutagens that increase the mutation rate53) also called feedback inhibition- Regulation of a metabolic pathway by the concentration of one of its intermediates or, typically, its end product, which inhibits an enzyme in the pathway.54) A chemical mutagen that can remove an amino group (-NH2) froma nitrogenous base, causing a point of mutation55) Molecule to which a polymerase can attach, to begin DNA replication56) The strand of DNA formed as a continuous strand during DNA replication
 

 

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