Question

a scientist studied the formation of the protein hemoglobin and made a chart to show the steps in the process arrange the labels steps for the formation of hemoglobin.

mrna travels to
a ribosome where its
codons will be
ead\

amino acids
released by trna
form peptide bonds

dna molecule
is \unzipped\
in nucleus

rna polymerase
is used to build a
mrna molecule

hemoglobin
synthesis
begins

hemoglobin
synthesis
complete

Explanation:

This is the sequential process of protein (hemoglobin) synthesis, starting with transcription in the nucleus, followed by translation at the ribosome.

1. First, the DNA molecule must unwind to expose the gene for hemoglobin.
2. Next, RNA polymerase uses the unwound DNA to build a complementary mRNA strand.
3. The mRNA then leaves the nucleus and travels to a ribosome to be translated.
4. At the ribosome, tRNA delivers amino acids, which are linked by peptide bonds to form a polypeptide chain.
5. Finally, the polypeptide folds into the functional hemoglobin protein.

Answer:

1. First box (after synthesis begins): DNA molecule is "unzipped" in nucleus
2. Second box: RNA polymerase is used to build a mRNA molecule
3. Third box: mRNA travels to a ribosome where its codons will be "read"
4. Fourth box (before synthesis complete): amino acids released by tRNA form peptide bonds