12.1 Total C

11. Which type of RNA is responsible for forming the structural components of ribosomes?

• Transfer RNA
• Messenger RNA
• Ribosomal RNA
• Nuclear RNA

11. How many genes can a single DNA molecule contain?

• Tens
• Hundreds or thousands
• Only one
• Millions

12. What happens to pre-mRNA molecules before they become functional?

• They are immediately used
• They are destroyed
• They require editing
• They replicate themselves

In the process of ________________, DNA is used as a template for making another type of nucleic acid called RNA.

• translation
• replication
• differentiation
• transcription

In the process of transcription, DNA is used as a template for making another type of nucleic acid called ____________________.

• ATP
• pyruvate
• RNA
• NADPH

The process begins when the enzyme ________________ binds to a region called the promoter.

• RNA polymerase
• DNA replicase
• ATP synthase
• catalase

The process begins when the enzyme RNA polymerase binds to a region called the _____________ .

• promoter
• repressor
• operator
• anticodon

What carries copies of the instructions for assembling proteins?

• mRNA
• tRNA
• introns
• exons
• rRNA

What makes up the subunits of ribosomes?

• mRNA
• tRNA
• introns
• exons
• rRNA

What carries amino acids and matches them to the coded message for assembling proteins?

• mRNA
• tRNA
• introns
• exons
• rRNA