Question

translation
after leaving the nucleus,
the mrna travels to one of
cell’s many ribosomes.
these ribosomes are made
of another type of rna
called ribosomal rna, or
rrna. this is where the
last step of protein
synthesis, translation,
occurs.

the ribosome reads the
mrna three bases at a
time. this group of three
bases is called a codon. each codon “codes” for an amino acid. (remember,
an amino acid is the basic unit of a protein.) as the ribosome ‘reads’ the mrna,
a third type of rna known as trna, or transfer rna, carries the amino acids to
the ribosome. the trna has three bases, the anticodon, which pairs up with
the three bases on the codon. the ribosome will then add the amino acids to the
growing amino acid chain. eventually, enough amino acids (the average human
protein has 480 amino acids) will be added and the protein will be complete.

1. where does this step occur?

1. what happens during this process?

1. what is the role of rrna?

1. what is the role of trna?

1. what is a codon?

1. what is an anticodon?

Explanation:

Question 10

The step (translation) occurs at the ribosomes in the cell. The text says "After leaving the nucleus, the mRNA travels to one of cell’s many ribosomes" and "This is where the last step of protein synthesis, translation, occurs."

During translation, the ribosome reads mRNA in codons (three - base groups). tRNA with anticodons brings corresponding amino acids, and the ribosome links these amino acids into a growing polypeptide chain (protein) until the protein is complete. The text states "The ribosome reads the mRNA three bases at a time... The ribosome will then add the amino acids to the growing amino acid chain. Eventually... the protein will be complete."

rRNA (ribosomal RNA) is a component of ribosomes. The text says "These ribosomes are made of another type of RNA called ribosomal RNA, or rRNA", and ribosomes are the site of translation (protein synthesis). So rRNA is part of the ribosome structure, providing the site for translation.

Answer:

At the ribosomes in the cell.

Question 11