Chapter 12.1 RNA --> Transcription Review

In the process of ​ (a)   , DNA is used as a template for making another type of nucleic acid called ​ (b)   . The process begins when the enzyme ​ (c)   binds to a region called the ​ (d)   .

• transcription
• RNA
• RNA polymerase
• promoter
• translation
• DNA polymerase
• enhancer

Carries copies of the instructions for assembling proteins.

• mRNA

• rRNA

• tRNA

• introns

• exons

Makes up the subunits of ribosomes

• mRNA

• rRNA

• tRNA

• introns

• exons

Carries amino acids and matches them to the coded message for assembling proteins

• mRNA

• rRNA

• tRNA

• introns

• exons

Sections of an mRNA molecule that are removed

• mRNA

• rRNA

• tRNA

• introns

• exons

Sections of an mRNA molecule that are not removed, and are joined together to form the completed molecule

• mRNA

• rRNA

• tRNA

• introns

• exons

The diagram shows the process in which pre-mRNA is changed into mRNA.
Which events are described in the diagram?

• Introns are removed, and remaining exons are spliced together.

• Exons are removed, and remaining introns are spliced together.

• Introns and exons are removed, and remaining DNA is spliced together.

• Introns are removed, condensed, and then combined again.

In which ways is RNA different from DNA? Select three properties that apply to RNA, but not DNA.

• generally single-stranded

• contains thymine

• contains uracil

• contains the sugar ribose

• contains the sugar deoxyribose

Which of these events occurs first during the process of transcription?

• RNA polymerase joins nucleotides into the RNA molecule.

• RNA polymerase binds to the promoter.

• Introns are removed from the RNA molecule.

• Exons are removed from the RNA molecule.
  

George is studying a computer model of a DNA molecule, in which the letters
A, C, G, and T are listed in a very long sequence. The model includes a total of 2000 genes that are scattered along the full length of the molecule. The genes make up only a small fraction of the molecule.

George wants to identify the locations of the genes. Which would be the MOST USEFUL first step to follow?

• Divide the model molecule into 2000 segments of equal size.

• Identify all of the start codons in the model molecule.

• Identify the promoter regions in the model molecule.

• Divide the model molecule into three-letter pieces.