CHEM1 vid 1
Quiz by Sally Gomez
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18 questions
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- Q1What level do mutations originate at, and where do their effects show?Mutations originate at the DNA level and show their effects at the RNA level.Mutations originate at the DNA level and show their effects at the protein level.Mutations originate at the RNA level and show their effects at the DNA level.Mutations originate at the RNA level and show their effects at the protein level.Mutations originate at the protein level and show their effects at the DNA level.30s
- Q2What is sickle cell disease classified as?A conservative mutation and a non-sense mutation.A point mutation and a non-sense mutation.A missense mutation and a frame-shift mutation.A frame-shift mutation and a silent mutation.A nonconservative missense mutation and a point mutation.30s
- Q3What are nonconservative mutations?Mutations that change an amino acid from one to another of the same type.Mutations where the new amino acid is of a different type from the original amino acid.Mutations that add or delete bases in the DNA sequence.Mutations that have no effect on protein synthesis.Mutations that change the reading frame of the RNA.30s
- Q4What are conservative mutations?Mutations that change the reading frame of the RNA.Mutations that add or delete bases in the DNA sequence.Mutations that change an amino acid from one to another.Mutations where the new amino acid is of the same type as the original amino acid.Mutations that have no effect on protein synthesis.30s
- Q5What are silent mutations?Mutations that change an amino acid from one to another.Mutations that add or delete bases in the DNA sequence.Mutations that do not actually affect the protein at all because different RNA codons can code for the same amino acid.Mutations that have no effect on protein synthesis.Mutations that change the reading frame of the RNA.30s
- Q6What is a missense mutation?A genetic mutation that changes an amino acid from one to another in the protein sequence.A genetic mutation that leads to the RNA sequence becoming a stop codon instead of coding for an amino acid.A genetic mutation that adds or deletes bases in the DNA sequence.A genetic mutation that changes the reading frame of the RNA.A genetic mutation that doesn't affect the protein at all.30s
- Q7What is a non-sense mutation?A genetic mutation that changes an amino acid from one to another.A genetic mutation that doesn't affect the protein at all.A genetic mutation that changes the reading frame of the RNA.A genetic mutation that leads to the RNA sequence becoming a stop codon instead of coding for an amino acid.A genetic mutation that adds or deletes bases in the DNA sequence.30s
- Q8What is a frame-shift mutation?When one or more bases are added or deleted, causing a shift in the reading frame of the RNA.When a DNA sequence generates a stop codon instead of an amino acid.When one of the DNA bases is replaced with another, leading to a change in one RNA nucleotide and ultimately a change in one amino acid.When an amino acid is changed from one to another.A mutation in which one or more bases are added or deleted, causing a shift in the reading frame of the RNA and resulting in significant changes in the protein sequence.30s
- Q9What is a point mutation?When one of the DNA bases is replaced with another, leading to a change in one RNA nucleotide and ultimately a change in one amino acid.When a DNA sequence generates a stop codon instead of an amino acid.When the reading frame of the RNA is altered.When one of the DNA bases is added to the sequence.When an amino acid is changed from one to another.30s
- Q10What is the central dogma of molecular biology?The genetic information of a cell is stored in the form of DNA, which is then transcribed to form RNA and then translated to generate protein.Protein is transcribed to DNA, which is then translated to RNA.RNA is transcribed to DNA, which is then translated to generate protein.DNA is transcribed to RNA, which is then translated to generate protein.Protein is transcribed to RNA, which is then translated to DNA.30s
- Q11What is a mutagen?A mutagen is a sequence of nucleotides that codes for a specific protein.A mutagen is a protective protein that repairs damaged DNA.A mutagen is a type of DNA polymerase enzyme involved in DNA replication.A mutagen is a cellular organelle responsible for protein synthesis.A mutagen is a physical or chemical agent that causes mutations in DNA.30s
- Q12What is the function of the nucleus in a eukaryotic cell?The nucleus controls cell division and reproduction.The nucleus stores and protects the genetic material (DNA) of the cell.The nucleus synthesizes proteins for the cell.The nucleus generates energy for cellular processes.The nucleus transports molecules within the cell.30s
- Q13What is the function of mRNA (messenger RNA) in protein synthesis?mRNA acts as a template for DNA replication.mRNA carries amino acids to the ribosomes during protein synthesis.mRNA provides the energy for protein synthesis.mRNA carries the genetic information from DNA to the ribosomes for protein synthesis.mRNA stores genetic information in the form of codons.30s
- Q14What is the function of the promoter region in gene expression?The promoter region transports tRNA to the ribosomes during translation.The promoter region codes for specific amino acids in a protein.The promoter region is involved in the splicing of mRNA transcripts.The promoter region determines the stability of mRNA molecules.The promoter region is responsible for initiating and regulating the transcription of a gene.30s
- Q15What is the function of DNA polymerase in DNA replication?DNA polymerase is involved in the transcription of DNA into mRNA.DNA polymerase repairs damaged sections of DNA in the cell.DNA polymerase regulates the expression of genes by binding to specific DNA sequences.DNA polymerase is responsible for synthesizing new DNA strands by adding complementary nucleotides during DNA replication.DNA polymerase transports nucleotides to the site of protein synthesis in the cell.30s