3-2.c Protein Synthesis Practice

The first step of protein synthesis is transcription. What happens during transcription?

• DNA is transcribed into mRNA

• mRNA leaves the nucleus and goes to the cytoplasm

• tRNA transfers amino acids to mRNA

Where does transcription occur?

• inside the nucleus

• outside the nucleus in the cytoplasm

Translation is the second step of protein sysnthesis. What happens during translation?

• tRNA transfers amino acids to mRNA to make a protein

• DNA is transcribed into mRNA

• DNA is transcribed into DNA

Where does translation occur?

• inside the nucleus

• outside the nucleus in the cytoplasm

Which of the following statements are true?

• DNA is single stranded and RNA is double stranded

• DNA is double stranded and RNA is single stranded

• Both DNA and RNA are single stranded

Here is a DNA strand.

CAG TTT CGA

Convert this DNA strand to RNA

• GTC AAA GCT

• GUC AAA GCU

• GUC UUU GCU

Which base does RNA have that DNA does not?

• Uracil

• Thymine

• Guanine

Which monomer builds proteins?

• monosaccharides

• nucleotides

• amino acids

Insertion and deletion are types of mutations that can alter the entire DNA sequence. What are these types of mutations called?

• Frameshift mutations

• Substitution mutations

• Substitution shifting mutations

Use the codon chart to figure out the amino acid sequence for the following mRNA sequence.

AAU GAC UUU

• Glu Pro His

• Lys Ser Phe

• Asn Asp Phe