HML 3103 quiz 1 practice exam SA

A patient is suspected of having a viral infection that does not show up in antibody tests. Why would a nucleic acid-based test be preferable, and name one method used for this purpose?

A forensic investigator needs to analyze a sample from a crime scene that contains a very small amount of genetic material. Which molecular technique would be most effective?

A person inherits one normal allele and one mutated allele for a gene, but the individual shows a phenotype that is intermediate between both alleles. What is this type of inheritance called?

Q4. A father has an X-linked dominant disorder. If he has a daughter, what is the probability that she will inherit the disorder?

Q5. Using the Genetic Code Table, answer the following questions: A. What is the function of the stop codon in translation, and name one stop codon? (2 Marks) B. A mutation changes a UUU codon (which codes for phenylalanine) to UUC. What effect will this have on the protein? (2 Marks)

A scientist compares the RNA extracted from the nucleus to the RNA found in the cytoplasm and notices a difference in size. What process is responsible for this change?

A hospital receives a sample that may contain a highly infectious bacterial pathogen. Why would molecular testing be safer than traditional culture?

Q8. A doctor suspects a bacterial infection that is resistant to antibiotics. How can molecular testing help determine the best treatment?

A researcher observes that different tissues in the body produce slightly different proteins from the same gene. What molecular mechanism explains this?

A mutation changes an amino acid in a protein, but the protein still functions normally. What type of mutation is this and why does it not affect function?