Old_Exam2_Answer - Geneitics 380, 2002 EXAMINATION #2...

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Geneitics 380, 2002 EXAMINATION #2 ANSWER Q. 1 . ( 21 Points ) The following statements are either True or False . Use a T or F on the lines below. F_____a. The tertiary structure of a protein refers to the way in which the polypeptide subunits of a multi-subunit protein fit together. T b. Wobble base-pairing refers to the relaxation of Watson-Crick base-pairing rules during the pairing of a mRNA codon with a tRNA anticodon. T c. Base substitution mutants can revert to the true wild type, but deletion mutants cannot. T d. Chemicals that are carcinogens, very often are mutagens also. F e. DNA bases are capable of undergoing "amino <--> imino" and "keto <--> enol" tautomerism. However, none of the bases can do both. They all undergo one or the other kind of tautomerism. F f. A complementation test is a genetic test designed to determine if two mutants in the same gene are located at the same exact base pair or not. F g F'-factor is the name given to a bacterial sex-factor when it is integrated into the chromosome resulting in an Hfr strain. T h. Some bacteriophages (such as Lambda) are capable of having 2 different life styles- a destructive one called "lytic" and benign one called "lysogenic". T i. Microbial mutants unable to grow on a minimal medium (which can support the wild type strain) are called "auxotrophs" F j. Heterochromatin is the name given to that DNA in the genome which is always genetically inactive. T k.
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This note was uploaded on 11/26/2011 for the course BIOLOGY 2c03 taught by Professor Dej during the Spring '11 term at McMaster University.

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Old_Exam2_Answer - Geneitics 380, 2002 EXAMINATION #2...

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