Exam 5: Fundamental Molecular Genetic Mechanisms

What is the difference between a nucleoside and a nucleotide?

This type of assay can be used to count the number of viral particles in a sample.

Viruses that use the lytic cycle of growth generally proceed through five general stages.Which one of the following shows the correct order of three of these stages?

Many antibiotics,most of which have been isolated from fungi,act by inhibiting initiation,elongation,or termination of peptides during protein synthesis.These compounds have been very useful in the study of protein synthesis,mainly because an individual antibiotic usually interferes with protein synthesis at a single well-defined step in the complex process of translation.Assume that you have isolated a novel antibiotic from the fungus Pilobolus.This antibiotic inhibits bacterial growth and bacterial protein synthesis but does not affect growth or protein synthesis in eukaryotic cells.How could you identify the component of the translational machinery that is affected by this novel antibiotic?

In DNA,which of the following base pairing normally occurs between two strands of DNA?

In the laboratory,which of the following two factors are most useful in manipulating DNA?

Approximately what percent of all human genes are expressed as alternatively spliced mRNAs?

The ability of DNA to denature is important for which process?

Which codon serves as the start codon in mRNA for translation?

There are four basic molecular processes in a cell,three of which lead to the production of protein.Which of the following shows the correct order?