Exam 16: The Molecular Basis of Inheritance

The images above are of DNA at various levels of coiling and folding. Use this image to answer the questions below. -Which image represents the 10 nm fibre, showing nucleosomes?

What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?

Chargaff's rule states

E. coli cells grown on ¹⁵N medium are transferred to ¹⁴N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?

Which of the enzymes removes the RNA nucleotides from the primer and adds equivalent DNA nucleotides to the 3' end of Okazaki fragments?

The images above are of DNA at various levels of coiling and folding. Use this image to answer the questions below. -Which image represents the chromatid?

Once the pattern found after one round of replication was observed, Meselson and Stahl could be confident of which of the following conclusions?

Individuals with the disorder xeroderma pigmentosum are hypersensitive to sunlight. This occurs because their cells are impaired in what way?

Heterochromatin is observed in

Use the following figure to answer the questions below. -A space probe returns with a culture of a microorganism found on a distant planet. Analysis shows that it is a carbon-based life form that has DNA. You grow the cells in ¹⁵N medium for several generations and then transfer them to ¹⁴N medium. Which pattern in the figure above would you expect if the DNA was replicated in a conservative manner?

In a linear eukaryotic chromatin sample, which of the following strands is looped into domains by scaffolding?

Which of the following statements is true of histones?

The difference between ATP and the nucleoside triphosphates used during DNA synthesis is that

Which of the following would you expect of a eukaryote lacking telomerase?

It became apparent to Watson and Crick after completion of their model that the DNA molecule could carry a vast amount of hereditary information in which of the following?

Use the following information to answer the questions below. The green algae Chlamydomonas is said to be GC rich. -The GC content of Chlamydomonas is approximately 70% in the coding sequences. What percentage of DNA is made up of adenine bases?

How do we describe transformation in bacteria?

The images above are of DNA at various levels of coiling and folding. Use this image to answer the questions below. -Which image represents the smallest level of DNA visualization?

Which of the enzymes synthesizes short segments of RNA?

These calculations follow what rule?