DNA, Mutation and Protein Synthesis

A deletion mutation occurs, leaving 11 bases in nucleotide sequence.

What is the maximum number of amino acids that could be coded for by this sequence?

• 3

• 4

• 6

• 11

A sequence of RNA is shown below:

5’ ACG AAA GAU 3’

Using the codon chart provided, what is the sequence of amino acids that is produced when this gene is translated?

• Cys - Lys - Glu

• Thr - Lys - Asp

• Thr - Asn - Glu

• Cys - Phe - Leu

An RNA sequence is shown below.

AUGCCGAAACGU

Which of the following statements describes how the RNA sequence specifies the production of an amino acid chain?

• Each base codes for one amino acid.

• Each set of three bases codes for a single amino acid.

• Each group of three bases codes for an enzyme that binds amino acids together.

• Each base produces electrical signals sent to the cytoplasm to initiate protein assembly.

A template strand of DNA in a gene reads:

3’ CCA AGC TCT 5’

Using the codon chart provided, what is the sequence of amino acids that is produced when this gene is translated?

• Ser - Arg - Gly

• Gly - Ser - Arg

• Gly - Leu - Ser

• Ser - Gly - Gly

The following DNA strand is used as a template for transcription:

3′ CGTAAGCGGCT 5′

Which of the following RNA strands will be produced?

• 5′ AGCCGCUUACG 3′

• 5′ GCAUUCGCCGA 3′

• 5′ CGUAAGCGGCU 3′

• 5′ UCGGCGAAUGC 3′

Which of the following happens in elongation stage of transcription?

• RNA polymerase stop transcribing.

• RNA polymerase binds to the promoter.

• RNA polymerase adds complementary nucleotides to the 3' end of the RNA strand.

Which of the following is true regarding the process of transcription?

• Transcription uses both strands of DNA to make mRNA.

• DNA polymerases control transcription.

• Transcription occurs for individual genes.

• The three stages of transcription are initiation, elimination, and reduction.

When RNA transcript is first made in a eukaryote, it requires further processing to become messenger RNA (mRNA).

What steps are needed to produce a mature mRNA?

Choose all answers that apply:

• Exons are joined together to form the mature mRNA.

• Introns are removed from the sequence.

• A 3' cap is added to the beginning of the RNA.

• A tail of C nucleotides is added to the end of the RNA.

Which phrase best describes translation?

• converts mRNA into a polypeptide
• catalyzes bonds between amino acids
• produces RNA from DNA molecules
• recycles tRNA molecules for reuse

Which of the following is the site of transcription?

• vacuole
• lysosome
• nucleus
• ribosome