MMSC 490 practice quiz 6 chapter 7 (Test questions with correct answers)

Which of the following does not contribute to the large variety of antigen-binding specificities found among the immunoglobulins? correct answers retrotransposons In addition to synthesizing DNA, DNA polymerase I has a second catalytic activity; it can correct answers remove RNA primers How many replication origins are there in the human genome? correct answers 30,000 DNA replication is correct answers semiconservative Which of the following statements is true of all known DNA polymerases? correct answers They synthesize DNA in the 5′ to 3′ direction, and they require a preformed primer hydrogen-bonded to the template. DNA polymerase requires a primer and cannot initiate synthesis de novo. What serves as a primer for DNA replication? correct answers Short fragments of RNA complementary to the template strand Which of the following statements about pyrimidine dimers is false? correct answers They can be repaired by photoreactivation in human cells. Which of the following statements regarding somatic hypermutation is false? correct answers Somatic hypermutation is thought to control the proliferation of B lymphocytes by rendering their genome .... A major difference between immunoglobulin heavy chains and light chains is that heavy chains contain _________ regions. correct answers D Telomeres are the correct answers end-sequences of chromosomes