BIOL 112 Study Guide - Final Guide: Missense Mutation, Valine, Nonsense Mutation

1.If phages are labeled only with radioactive sulfur and allowed to infect bacterial cells, the phage progeny resulting from lysis are expected

a. To have radioactive DNA and proteins

b. To have radioactive DNA

c.To have radioactive proteins

d. To have radioactive carbohydrates

e. To be non-radioactive

2. Franklin’s X-rays crystallography work provided which of the following regarding the structure of DNA?

a. It had a helical structure with more than one strand

b.Purines are paired with pyrimidines

c.It replicates in a semi-conservative manner

d. DNA is organized in a 5’ to 3’ direction

What types of amino acids are most responsible for binding of DNA to histones?

a.Hydrophobic amino acids

b. Polar amino acids

c.Positively charged amino acids

d.Negatively charged amino acids

The Hershey and Chase experiment showed that the _____ of the virus enters the host

Protein

DNA

DNA and Protein

Radioactive sulfur

Consider a hypothetical phage whose DNA replicates exclusivelyby rolling circle replication. A phage with radioactive DNA in bothstrands infects a bacterium and is allowed to replicate in anonradioactive medium. Assume that only daughter DNA from theelongated branch ever gets packaged into progeny particles.

a. What fraction of the parental radioactivity will appear inthe progeny phage? b. How many progeny phage will containradioactive DNA? c. What is the fundamental difference between theinitiation of θ replication and that of the rolling circle?