RNA and Protein Synthesis Test Corrections

Which THREE RNA bases would signal a stop codon?

• UAA, UAG, UGA

• UAC, UGC, UGG

• UAU, UGU, UGC

• UCA, UCG, UCU

What is the role of mRNA in protein synthesis?

• To carry genetic information from DNA to the ribosome

• To form the structure of ribosomes

• To transport amino acids to the ribosome

• To replicate DNA

Which process is identified by number 2 in the diagram?

• replication

• transcription

• translation

• transmutation

Study the sentences describing the steps of protein synthesis. Which sequence places the steps in the correct order?

1. Transfer RNA picks up individual amino acids and carries them to the ribosome.

2. Ribosomal RNA bonds mRNA and tRNA.

3. A single strand of DNA serves as a template for making mRNA.

4. Messenger RNA carries the sequence of nucleotides to the ribosomes.

5. A protein is synthesized.

• 2,5,3,4,1

• 3,4,1,2,5

• 3,2,4,5,1

• 2,4,1,5,3

Which amino acid is represented by the mRNA codons GAU and GAC?

• Alanine

• Aspartic acid

• Isoleucine

• Tryptophan

Which of the following is not an mRNA codon for Alanine?

• GCU

• GCC

• GCA

• GAU

Which amino acid is coded by the mRNA codons GCU, GCC, GCA, and GCG?

• Alanine

• Aspartic acid

• Isoleucine

• Tryptophan

You get one of each pair of chromosomes from each _______.

• prokaryotic

• DNA

• parent

• cell

What is a difference between DNA and RNA?

• DNA is double-stranded and RNA is single-stranded

• DNA contains all of your genetic information, and RNA contains none

• RNA is a much more complex molecule than DNA

• DNA is much more complex in structure and function than RNA

Which nitrogenous base in DNA is replaced by uracil in RNA?

• Adenine

• Thymine

• Cytosine

• Guanine