Ib Biology Transcription

What is the function of RNA polymerase?

• Adds DNA nucleotides to the 3' end of a growing strand

• Adds RNA nucleotides to the 3' end of a growing strand

• Adds DNA nucleotides to the 5' end of a growing strand

• Adds RNA nucleotides to the 5' end of a growing strand

Which answer shows the sections of a gene in the correct order?

• Promoter, coding sequence, terminator

• Coding sequence, promoter, terminator

• Terminator, coding sequence, promoter

• Promoter, terminator, coding sequence

When does transcription stop?

• When RNA polymerase detaches from the DNA

• When the terminator sequence is reached

• When the end of the coding sequence is reached

• When there are no more nucleotides left

What binds to the promoter to initiate transcription?

• Transcription factor protein

• RNA polymerase enzyme

• Complementary RNA nucleotides

• DNA helicase

Which of the following is not a feature of post-transcription?

• Removal of exons by splicing

• Addition of a 5' methyl cap

• Addition of a 3' poly-A tail

Which of the following statements is incorrect?

• The mRNA strand is complementary to the antisense DNA strand

• The mRNA strand is identical to the antisense DNA strand, except for uracil

• The mRNA strand is identical to the sense DNA strand, except for uracil

Which of the following is not a possible result of alternative splicing for a gene consisting of 4 exons?

• 2-3-4

• 1-2-4

• 1-3

• 1-3-2

If the antisense strand of a gene has the sequence AAT-GCC, what will be the transcribed mRNA sequence?

• AAU-GCC

• TTA-GCC

• AAT-GCC

• UUA-GCC

What is a promoter region?

• A non-coding section of a gene that immediately precedes the coding sequence

• A non-coding section of a gene that immediately follows the coding sequence

• A coding section of a gene that immediately precedes the terminator

• A coding section of a gene that immediately follows the terminator

The sense and antisense strands of DNA are the same for every gene on a chromosome.

• True

• False