Podcast
Questions and Answers
During DNA replication, which enzyme is responsible for relieving the torsional stress ahead of the replication fork by undoing supercoils?
During DNA replication, which enzyme is responsible for relieving the torsional stress ahead of the replication fork by undoing supercoils?
- DNA Gyrase (correct)
- DNA Helicase
- DNA Ligase
- DNA Polymerase III
If a mutation were to prevent the function of single-stranded binding proteins during DNA replication, what would be the most likely direct consequence?
If a mutation were to prevent the function of single-stranded binding proteins during DNA replication, what would be the most likely direct consequence?
- Okazaki fragments would not be joined together.
- The DNA double helix would not be unwound.
- RNA primers would not be synthesized.
- The separated DNA strands would re-anneal. (correct)
Which of the following best describes the role of DNA ligase in DNA replication?
Which of the following best describes the role of DNA ligase in DNA replication?
- Synthesizing RNA primers to initiate DNA synthesis.
- Proofreading and correcting errors in the newly synthesized DNA strand.
- Unwinding the DNA double helix at the replication fork.
- Joining Okazaki fragments on the lagging strand. (correct)
A point mutation occurs where a single nucleotide base is changed. If adenine (A) is replaced with guanine (G), what specific type of point mutation is this?
A point mutation occurs where a single nucleotide base is changed. If adenine (A) is replaced with guanine (G), what specific type of point mutation is this?
Which enzyme is primarily responsible for proofreading during DNA replication to ensure high fidelity in the newly synthesized strand?
Which enzyme is primarily responsible for proofreading during DNA replication to ensure high fidelity in the newly synthesized strand?
In a population in Hardy-Weinberg equilibrium for a locus with two alleles, where the frequency of one allele is 0.7, what is the expected frequency of heterozygotes?
In a population in Hardy-Weinberg equilibrium for a locus with two alleles, where the frequency of one allele is 0.7, what is the expected frequency of heterozygotes?
A couple, both heterozygous for an autosomal recessive trait, are planning to have children. What is the probability that their first child will express the recessive trait?
A couple, both heterozygous for an autosomal recessive trait, are planning to have children. What is the probability that their first child will express the recessive trait?
During which phase of the cell cycle does DNA replication occur?
During which phase of the cell cycle does DNA replication occur?
If a coding sequence in DNA is 5'-ACG-3', what is the corresponding codon sequence in mRNA after transcription?
If a coding sequence in DNA is 5'-ACG-3', what is the corresponding codon sequence in mRNA after transcription?
A scientist is studying a family pedigree and observes that a certain disease appears in every generation, and that affected fathers always pass the trait to their daughters but not to their sons. What is the most likely mode of inheritance for this disease?
A scientist is studying a family pedigree and observes that a certain disease appears in every generation, and that affected fathers always pass the trait to their daughters but not to their sons. What is the most likely mode of inheritance for this disease?
Which of the following statements best describes mitosis?
Which of the following statements best describes mitosis?
When a recessive trait is expressed, it means that:
When a recessive trait is expressed, it means that:
In a pedigree, the “index case” is another name for:
In a pedigree, the “index case” is another name for:
Which of the following nitrogenous bases make up DNA?
Which of the following nitrogenous bases make up DNA?
Proteins and peptides are composed of:
Proteins and peptides are composed of:
Which phenotype(s) could not result from the mating of a Jk(a+b+) female and a Jk(a-b+) male?
Which phenotype(s) could not result from the mating of a Jk(a+b+) female and a Jk(a-b+) male?
Exon refers to:
Exon refers to:
PCR technology can be used to:
PCR technology can be used to:
Transcription can be defined as:
Transcription can be defined as:
When a male possesses a phenotypic trait that he passes to all his daughters and none of his sons, the trait is said to be:
When a male possesses a phenotypic trait that he passes to all his daughters and none of his sons, the trait is said to be:
When a female possesses a phenotypic trait that she passes to all of her sons and none of her daughters, the trait is said to be:
When a female possesses a phenotypic trait that she passes to all of her sons and none of her daughters, the trait is said to be:
DNA is replicated:
DNA is replicated:
RNA is processed:
RNA is processed:
Translation of proteins from RNA takes place:
Translation of proteins from RNA takes place:
Meiosis is necessary to:
Meiosis is necessary to:
