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Biology Chapter 3
Study Activities for Genetics Part 2 MCB2010
Question | Answer |
---|---|
Another name for the regulatory protein of the Lac Operon. | Repressor |
Another term for the fact that plasmids can replicate independently from the host cell DNA. | Autonomous Replication |
The Lac operon begins as: (on or off) and then is induced by lactose. | Off |
A promoter level control mechanism whereby te promoter/polymerase bond is weak results in: increased or decreased transcription? | Decreased transcription |
What type of mutation codes for a stop codon? | Nonsense Mutation |
Sequences in transposons that are the same in the same strand. | Direct Repeats |
The term for transposons that only code for their transfer, and do not carry other genes. | Insertion Sequences |
Sequences in transposons that are repeated in the reverse order in the opposite strand. | Inverted Repeats |
What is another name for a point mutation? | Base Substitution |
What type of mutation codes for a wrong amino acid? | Missense Mutations |
Circular, double stranded DNA that is independent of the bacterial chromosome. | Plasmid |
A promoter level control mechanism whereby te promoter/polymerase bond is very strong results in: increased or decreased transcription? | Increased transcription |
The ability of bacteria to pick up foreign pieces of DNA and incorporate that DNA into their genome. | Transformation |
The name of the plasmid that encodes antibiotic resistance. | R Factors |
The term for transposons that also carry the code for antibiotic resistance. | Complex Transposons |
What type of Streptococcus pneumoniae causes pneumonia? | Encapsulated |
The term for pieces of DNA which can move from one area of the DNA to another. | Transposons |
What does Hfr stand for? | High Frequency Recombinant |
What is the term for an F+ plasmid that integrates into the cell's genome? | Hfr |
This consists of a promoter, an operator and the genes controlled by the mechanism. | Operon |
What molecule binds to the repressor protein in the Lac Operon and induces the transcription of the genes? | Lactose |
What type of Streptococcus pneumoniae does not cause pneumonia? | Unencapsulated |
This molecule binds to the operator to block transcription of the genes. | Regulatory Protein |
What is the term for the transfer of genetic material from one bacterium to another using a bacteriophage? | Transduction |
The name of the plasmid in bacteria that confers fertility (abillity to conjugate). | F Factor |
What type of mutations occur when a single base is changed? | Point Mutations |
The portion of the R factor (plasmid) that carries the antibiotic resistance. | r-determinants |
True or False - Transpons are capable of autonomous replication. | False |
The transfer of DNA (a plasmid) from one bacterium to another via a pilus bridge. | Conjugation |
The portion of the R factor (plasmid) that carries the transfer information, as in coding for the pilus bridge. | RTF |
The genetic mechanism to control the production of the enzymes to break down lactose is considered: | Inducible |
The genetic mechanism to control the production of tryptophan is considered to be: | Repressible |
In the Griffith's experiments, heat killed encapslated bacteria were mixed with _______ and the mice died. | Live unencapsulated |
If you cross F+ x F-, the resulting daughter cells would be: | Both F+ |
The region of the Lac Operon that binds the repressor protein. | Operator |
What is considered to be the co-repressor in the Trp Operon? | Tryptophan |
If you know that the first four bases in an inverted repeat are: 5'-TCCA-3', what are the remaining four bases of the insertion sequence? | 5-'TGGA-3' |
The Trp operon begins as: (on or off) and then is repressed by tryptophan and the repressor together binding to the operator. | On |