Chapter 7- Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 2) An enzyme coded for by a gene that is sometimes active and sometimes inactive3) The form of a gene that occupies the same place (locus) on the DNA molecule as another form but may carry different information for a trait.4) Type of RNA that transfers amino acids from the cytoplasm to the ribosomes for placement in a protein molecule.5) A sequence of three bases in mRNA that specifies a particular amino acid in the translation process6) a mutation produced by agents called mutagens that increase the mutation rate7) The strand of DNA formed as a continuous strand during DNA replication8) Molecule to which a polymerase can attach, to begin DNA replication9) An enzyme that binds to one strand of exposed DNA during transcription and catalyzes the synthesis of RNA from the DNA template12) 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. 13) The opposite head to tail arrangement of the two strands in the DNA double helix. 14) induced mutations are produced by agents called ______, which increase the mutation rate above the spontaneous mutation rate. 15) A chemical mutagen that can remove an amino group (-NH2) froma nitrogenous base, causing a point of mutation16) (also called terminator ______) The last _____ to be translated in a molecule of mRNA, causing the ribsome to release from the mRNA18) an enzyme that cuts DNA at precise base sequenses 20) An enzyme that moves along behind each replicationi fork, synthesizing new DNA strands complementary to the original ones.21) a site at which the two strands of DNA double helix seperate during replication and new complementary DNA strands form22) The transmition of genetic traits from an organism to its progeny25) 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.26) an enzyme found in retroviruses that copies RNA into DNA29) The synthesis of RNA from a DNA template31) the location of a gene on a chromosome.33) A test to determine that resistance to chemical substances occurs spontaneously rather than being induced.34) a mechanism whereby the genes coding for enzymes needed to metabolize a particulary nutrient are activated by the presence of that nutrient.37) The last codon to be translated in a molecule of mRNA, causing the ribosome to release from the mRNA.52) A linear sequence of DNA nucleotides that form a functional unit within a chromosome or plasmid Across: 1) an enzme that joins together DNA segments9) Gene that controls the expression of structural genes of an operon throughout the synthesis of a repressor protein.10) a cancer producing substance11) (also called a terminator _____) A set of three bases in a gene (or mRNA) that does not code for an amino acid.17) Process by which the presence of a preferred nutirent (often glucose) represses the genes coding the enzymes used to metabolize some alternative nutrient19) A substance that binds to and inactivates a repressor protein.23) (also called polysome) A long chain of ribosomes attached at different points along an mRNA molecule24) a gene that carries information for the synthesis of a specific ploypeptide27) replication in which a new DNA double helix is synthesized from one strand of parent DNA and one strand of new DNA 28) two adjacent pyrimidines bonded together in a DNA strand, usually as a result of exposure to ultraviolet rays30) The region of a gene (or mRNA) that codes for a protein in eukarotic cells.32) a technique that rapidly produces a billion or more identical copies of DNA fragment without needing a cell35) A chemical mutagen that can add alkyl groups (-CH3) to DNA bases, altering their shapes and causing errors in base pairing36) A mutation that occurs in the absence of any agen known to cause changes in DNA; usually caused by errors during DNA replication38) An enzyme that is synthesized continuously regardless of the nutrients available to the organism39) Mechanism by which the presence of a particular metabolite represses the genes coding for enzymes used in its synthesis.40) A type of RNA that, together with specific proteins, makes up the ribosomes41) DNA used as a pattern for the synthesis of a new nucleotide polymer in replication or transcription42) One of the short, discontinuous DNA segments formed on the lagging strand during DNA replication.43) (also called intervening region) Region of a gene (or mRNA) in eukaryotic cells that does not code for a protein.44) Formation of new DNA molecules45) a chemical mutagen that can be inserted between bases of the DNA double helix, causing frameshift mutation46) (also called light repair) Repair of DNA dimers by a light-activated enzyme.47) a technique used to transfer colonies from one medium to another48) Light rays, such as X-rays and ultra violet rays, that can act a mutagens.49) A normal, nonmutant organism (also called a wild type)50) 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.51) the promoter and operator regions of an operon53) A type of RNA that carries the information from DNA to dictate the arrangement of amino acids in a protein. 54) Test used to determine whether a particular substance is mutagenic, based on its ability to induce mutations in auxotrophic bacteria.55) Mutation resulting from the deletion or insertion of one or more bases.
 

 

Create your own Crossword Puzzle for Free!		  Show Errors as I Type