Question Bank: Basic Processes

What is the primary model of DNA replication proposed by Watson and Crick?

Which enzyme is primarily responsible for synthesizing new DNA strands during replication?

During DNA replication, which base pair correctly matches according to Chargaff's rules?

What type of replication does the Messelson and Stahl experiment demonstrate?

What does DNA ligase do during DNA replication?

Why is an RNA primer necessary for DNA replication?

In which direction does DNA replication occur on the newly synthesized strand?

What occurs during the 'unzipping' phase of DNA replication?

Which statement about Okazaki fragments is correct?

Which mechanism ensures the accuracy of DNA replication?

What is the function of helicase during DNA replication?

What did the second generation DNA from the Messelson and Stahl experiment contain?

What structural feature differentiates RNA from DNA?

Which strand of DNA is synthesized continuously?

During DNA replication, which component helps to prevent the strands from re-annealing?

What is the primary form of genetic material found in prokaryotes?

How is prokaryotic DNA typically organized within the cell?

Which proteins are most commonly associated with eukaryotic DNA packaging?

What is a nucleosome?

Where is the genetic material located in prokaryotic cells?

What is the role of plasmids in prokaryotic cells?

Which of the following statements is true regarding eukaryotic gene organization?

How do prokaryotes compress their large DNA into a small cell?

What is the primary difference between the histones found in eukaryotes and the proteins found in prokaryotes?

During which phase of the cell cycle are nucleosomes condensed into chromosomes?

Which type of gene organization is characterized by the presence of introns and exons?

A genetic organization where most of the genes are co-transcribed into a single mRNA molecule is typical of which organism?

What aspect of eukaryotic genome organization primarily allows for gene regulation?

What kind of genetic recombination is uniquely facilitated in prokaryotes but rarely observed in eukaryotes?

Which of the following is NOT a function of plasmids in prokaryotic cells?

Who first isolated DNA from the nuclei of cells?

What is the role of DNA in organisms?

What type of DNA did Griffith use in his transformation experiments?

Which experiment provided strong evidence for DNA as genetic material?

What are Chargaff's rules related to?

In Griffith’s experiment, what transformed the non-virulent strain into a virulent one?

What is the shape of the DNA molecule?

Which type of genetic material is found in some viruses?

Which organism did Griffith primarily study in his experiments?

In the Hershey-Chase experiment, what was labeled with sulfur?

Which of the following scientists contributed to the discovery of the double helix structure of DNA?

What is the key significance of DNA being the genetic material?

Which of the following best describes the transformation principle discovered by Griffith?

Which technique was used to visualize the structure of DNA?

What role does the polysaccharide capsule play in virulent bacteria?

What is the primary function of mRNA in gene expression?

In which process is the genetic code translated into amino acids?

What is the role of RNA polymerase in transcription?

What happens to introns during RNA processing in eukaryotes?

Which part of the gene is crucial for RNA polymerase binding?

The phenomenon whereby a single mRNA is translated by multiple ribosomes concurrently is known as what?

In prokaryotes, gene expression is regulated via which of the following mechanisms?

The process that converts mRNA into a functional protein occurs in which cellular structure?

What is the significance of the 5' cap and poly-A tail in mRNA?

Which of the following best describes the genetic code?

What type of mutation involves a single nucleotide change?

What is the role of the lac operon in E. coli?

Reverse transcription is primarily associated with which type of virus?

What is the minimum number of nucleotides required to encode a single amino acid?

Which of the following statements about the genetic code is TRUE?

What role does the 'start codon' AUG play in protein synthesis?

How many total codons are possible in the genetic code?

Which of the following amino acids does the codon AAA specify?

The process of translation occurs in which part of the cell?

What is the significance of the poly-A tail in mRNA?

During translation, what determines which tRNA binds to the mRNA?

What is the starting amino acid in the translation process?

What is splicing in the context of mRNA processing?

In which part of the ribosome does the tRNA carrying the growing polypeptide chain bind?

Which scientist is credited with deciphering the first codon?

What enzyme catalyzes the formation of peptide bonds during translation?

Why does a single tRNA molecule often recognize more than one codon?

What must occur before translation begins in both prokaryotes and eukaryotes?

Which of the following is NOT a characteristic of the genetic code?

Which site in the ribosome is responsible for the exit of the uncharged tRNA?

The degeneracy of the genetic code refers to?

During termination of translation, what signals the end of polypeptide synthesis?

Which of the following accurately describes the Shine-Dalgarno sequence?

What happens during the termination stage of translation?

What is the role of release factors in translation termination?

In prokaryotic translation, where does the assembly of the ribosome begin?

Which factor is essential for the elongation phase of translation?

What is the consequence of having multiple ribosomes translating the same mRNA simultaneously?

How does the structure of eukaryotic mRNA differ from that of prokaryotic mRNA?

What mechanism assures that only specific aminoacyl-tRNA enters the A site?

Which of the following statements is true regarding the peptide bond formation?

What is the primary function of DNA repair mechanisms?

Which type of DNA repair removes damaged bases by identifying and excising them?

What triggers the mechanism of Nucleotide Excision Repair (NER)?

Which protein complex is involved in the initial identification of DNA damage in NER?

During Base Excision Repair, what does DNA glycosylase do?

Which type of mutation is repaired by Mismatch Repair (MMR)?

What is the primary role of DNA ligase in DNA repair processes?

In the Mismatch Repair mechanism, what do proteins MutH, MutL, and MutS do?

What is the main disadvantage of not having effective DNA repair mechanisms?

What is the significance of the AP site in DNA repair?

How does the presence of pyrimidine dimers affect DNA structure?

Which type of DNA repair is often utilized for correcting errors during DNA synthesis in eukaryotes?

In which DNA repair mechanism is a section of the damaged DNA strand removed?

What specific type of damage does oxidative stress typically cause to DNA?

Which DNA repair mechanism is primarily responsible for repairing large, bulky DNA adducts?

What is a gene mutation?

Which of the following is an example of point mutation?

What type of mutation alters the reading frame of the genetic code?

Which agent is considered a mutagen?

Sickle cell anaemia is a result of which type of mutation?

What is the primary effect of a frameshift mutation?

Which of the following describes a transition mutation?

What can be a consequence of a deletion mutation?

Which of the following statements is true regarding mutations?

Which type of mutation causes no change in the encoded amino acid?

If a single base is deleted from a DNA sequence, what will be the likely effect?

What role do repair enzymes play in relation to mutations?

How can environmental factors induce mutations?

A mutation that results in the formation of a stop codon from a codon encoding an amino acid is called what?

What type of mutation involves the exchange of a purine with a pyrimidine?

What is often the consequence of a frameshift mutation on the protein produced?

What is the primary mechanism of gene regulation in prokaryotes?

Which of the following is a characteristic of constitutive genes?

In the lac operon, what role does the presence of lactose play?

What term describes the mechanism by which gene expression is turned on or off?

Which enzyme is crucial for the initiation of transcription in eukaryotes?

What is the role of a promoter in gene expression?

During gene regulation, what is usually the role of the repressor?

How do environmental changes affect gene expression in bacteria?

What type of regulation involves the modification of mRNA after transcription?

Which type of molecule can enhance gene expression by binding to specific DNA sequences?

What is the function of enhancers in gene expression?

Which process removes introns from the primary RNA transcript?

What is an operon?

Which of the following best describes regulated gene expression?

What is RNA interference (RNAi)?

What is the role of chromatin remodeling in gene regulation?