Question

short answer: describe what happens when trna brings amino acids to the ribosome.
your answer

put the following steps in the correct order (1 - 4): 1 - mrna leaves the nucleus and attaches to a ribosome 2 - trna attaches amino acids with peptide bonds 3 - mrna copies the code from dna 4 - rrna reads the code and signals trna
your answer

Explanation:

1. When tRNA brings amino - acids to the ribosome, the amino - acids are added to the growing polypeptide chain. The tRNA's anticodon pairs with the mRNA's codon at the ribosome, and a peptide bond is formed between the new amino - acid and the existing chain.
2. For the order of steps: First, mRNA copies the code from DNA (3). Then, mRNA leaves the nucleus and attaches to a ribosome (1). Next, rRNA reads the code and signals tRNA (4). Finally, tRNA attaches amino - acids with peptide bonds (2).

Answer:

1. The amino - acids are added to the growing polypeptide chain as the tRNA anticodon pairs with the mRNA codon and peptide bonds are formed.
2. 3, 1, 4, 2