Molecular Biology Assessment - Multiple Choice Section

What is the sugar component of a DNA nucleotide?

• Ribose

• Deoxyribose

• Glucose

• Sucrose

Which nitrogenous base is found in RNA but typically not in DNA?

• Adenine

• Guanine

• Cytosine

• Uracil

What is the typical number of strands in a DNA molecule?

• One

• Two

• Three

• Four

What is the typical number of strands in an RNA molecule?

• One

• Two

• Three

• Four

In what direction does RNA polymerase synthesize a new RNA strand?

• 3' to 5'

• 5' to 3'

• Both directions

• Depends on the template strand

In prokaryotes, what is the name of the primary transcription factor that helps RNA polymerase bind to the promoter?

• Rho factor

• Sigma factor

• Alpha factor

• Beta factor

According to the sources, how many origins of replication are typically found in a prokaryotic genome?

• Zero

• One

• Multiple

• Varies greatly

What is the modification found at the 5' end of a prokaryotic mRNA molecule, according to the source?

• A 5' methylguanosine cap

• A poly-A tail

• A triphosphorus cap

• Adenylation

Which two consensus sequences are typically found in the prokaryotic promoter region mentioned in the source?

• -10 and +1

• -35 and +1

• -10 and -35

• +1 and +10

Which region within the prokaryotic promoter is described as critical for the start of transcription?

• The -35 region

• The -10 region

• The operator region

• The terminator region