1. Which amino acid corresponds to the codon ACC?

a. isoleucine
b. threonine
c. glutamine
d. trptophan

2. A leafy sea dragon's enzyme is being made in a cell. Which two codons represent the amino acid pheylalanine?

a. UUU and UUC
b. UUA and UUG
c. AUU and UUA
d. AAU and UCC

3. Which amino acids are in the code AUGGUCGGU?

a. methionine, valine, and aspartic acid
b. methionine, valine, and glycine
c. arginine, histidine, and cysteine
d. methionine, glutamine, and alanine

4. Where do the instructions for building a protein originally come from?

a. rRNA
b. DNA
c. mRNA
d. tRNA

1. Amino acids are the building block of proteins and are used to synthesize polypeptides. The amino acids are coded by codons, the sequence of three nucleotides. The codon ACC codes for amino acid threonine.

2. Phenylalanine is an amino acid, which is coded by the codons UUU and UUC. Phenylalanine is a type of essential amino acid, which is obtained from external resources.

3. The codons are linked together by peptide bonds, which result in the formation of polypeptides. In the codon sequence, AUGGUCGGU, the amino acids present are methionine (AUG), valine (GUC), and Glycine (GGU).

4. mRNA or messenger RNA is a single-stranded molecule, which carries the information from DNA to RNA. The mRNA undergoes transcription and translation to produce the required sequence of proteins.

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