Question

13 put the sequence of protein synthesis in the proper order: dna strands unwind and separate mrna leaves the nucleus and attaches to a ribosome amino acids bind to each other, the chain lengthens mrna copies dna according to complementary base pairing a stop codon is reached, the newly formed protein is released trna carries and amino acid and binds to the corresponding mrna codon

Explanation:

Step1: Transcription Initiation

DNA strands unwind and separate (this is the start of transcription, where the DNA template is exposed).

Step2: Transcription (mRNA Synthesis)

mRNA copies DNA according to complementary base pairing (during transcription, mRNA is synthesized using the DNA template).

Step3: mRNA Processing and Transport

mRNA leaves the nucleus and attaches to a ribosome (after transcription, mRNA moves to the cytoplasm and binds to a ribosome to start translation).

Step4: Translation Initiation (tRNA Binding)

tRNA carries an amino acid and binds to the corresponding mRNA codon (tRNA brings the correct amino acid to the ribosome based on the mRNA codon).

Step5: Polypeptide Elongation

amino acids bind to each other, the chain lengthens (as tRNA brings more amino acids, the peptide chain grows).

Step6: Translation Termination

a stop codon is reached, the newly formed protein is released (when a stop codon is encountered, translation stops and the protein is released).

Answer:

1. DNA strands unwind and separate
2. mRNA copies DNA according to complementary base pairing
3. mRNA leaves the nucleus and attaches to a ribosome
4. tRNA carries an amino acid and binds to the corresponding mRNA codon
5. amino acids bind to each other, the chain lengthens
6. a stop codon is reached, the newly formed protein is released