Podcast
Questions and Answers
What is the term used to describe chemicals that insert themselves between DNA bases and can lead to frameshift mutations?
What is the term used to describe chemicals that insert themselves between DNA bases and can lead to frameshift mutations?
- Thymine dimers
- Intercalating agents (correct)
- DNA-modifying agents
- Chemical mutagens
What type of mutation leads to the insertion of an extra nucleotide in the codon sequence?
What type of mutation leads to the insertion of an extra nucleotide in the codon sequence?
- Transitions mutation
- Suppressor mutation
- Reversion mutation
- Deletion mutation (correct)
Which type of mutant expresses its phenotype only under certain conditions?
Which type of mutant expresses its phenotype only under certain conditions?
- Resistance mutant
- Lethal mutant
- Conditional mutant (correct)
- Biochemical mutant
Which type of mutation alters a single nucleotide base but does not change the amino acid sequence in the protein produced?
Which type of mutation alters a single nucleotide base but does not change the amino acid sequence in the protein produced?
What is the term for a mutant unable to grow in the absence of a specific molecule?
What is the term for a mutant unable to grow in the absence of a specific molecule?
What is the effect of a nonsense mutation in the genetic code?
What is the effect of a nonsense mutation in the genetic code?
Which type of mutation results in a stop codon, halting the translation process?
Which type of mutation results in a stop codon, halting the translation process?
Which phenomenon can restore the original gene by reversing a previously occurred mutation?
Which phenomenon can restore the original gene by reversing a previously occurred mutation?
What type of mutant undergoes a mutation that reverts back to the wild-type phenotype at a secondary site?
What type of mutant undergoes a mutation that reverts back to the wild-type phenotype at a secondary site?
What is the term for the observable characteristics of an organism as a result of its genetic makeup?
What is the term for the observable characteristics of an organism as a result of its genetic makeup?
Which chemical agent is known for chemically altering DNA bases, such as guanine binding to thymine?
Which chemical agent is known for chemically altering DNA bases, such as guanine binding to thymine?
What is the function of a suppressor tRNA with a mutation?
What is the function of a suppressor tRNA with a mutation?
How is the process of screening different from selection?
How is the process of screening different from selection?
What is the role of LexA in the Global SOS response?
What is the role of LexA in the Global SOS response?
What is the main advantage of horizontal gene transfer?
What is the main advantage of horizontal gene transfer?
How does RecA protein contribute to gene repair?
How does RecA protein contribute to gene repair?
Which enzyme is responsible for preventing gene expression in the absence of damage?
Which enzyme is responsible for preventing gene expression in the absence of damage?
What is the protein that facilitates strand invasion during DNA exchange or recombination?
What is the protein that facilitates strand invasion during DNA exchange or recombination?
Which form of DNA can carry antibiotic resistance genes and other genes?
Which form of DNA can carry antibiotic resistance genes and other genes?
What allows for the movement of jumping genes known as transposons within DNA?
What allows for the movement of jumping genes known as transposons within DNA?
What is responsible for creating double-strand breaks during the process of transferring DNA?
What is responsible for creating double-strand breaks during the process of transferring DNA?
Which element consists of two identical IS elements with genes in between and can carry antibiotic resistance genes?
Which element consists of two identical IS elements with genes in between and can carry antibiotic resistance genes?
During DNA exchange, what must be similar in order for homologous recombination to occur?
During DNA exchange, what must be similar in order for homologous recombination to occur?
What process involves the transfer of free DNA fragments?
What process involves the transfer of free DNA fragments?
Which element recognizes the IS element ends in transposition?
Which element recognizes the IS element ends in transposition?
What is the function of RepA in plasmids during bacterial conjugation?
What is the function of RepA in plasmids during bacterial conjugation?
Which cycle involves phage DNA integrating into the bacterial chromosome at a homologous site?
Which cycle involves phage DNA integrating into the bacterial chromosome at a homologous site?
What is the function of a prophage in the lysogenic cycle?
What is the function of a prophage in the lysogenic cycle?
Which method involves the transfer of DNA directly between bacteria through direct cell-to-cell contact?
Which method involves the transfer of DNA directly between bacteria through direct cell-to-cell contact?
In rolling circle replication, what binds to the origin of replication (ori)?
In rolling circle replication, what binds to the origin of replication (ori)?
What type of transduction brings DNA from the first host cell into the recipient cell?
What type of transduction brings DNA from the first host cell into the recipient cell?
What facilitates transfer during bacterial conjugation?
What facilitates transfer during bacterial conjugation?
In specialized transduction, what exchanges a portion of host DNA between cells?
In specialized transduction, what exchanges a portion of host DNA between cells?
