Listed in the item bank are individual steps that need to be ordered. to find out more information about steps, some have more details available when you click on them. drag and drop the steps in the proper order by placing each in its corresponding open rectangle. be sure that the earliest step is placed next to the number 1.

answer list -

mrna moves to the ribosome
dna unzips in the nucleus
protein assembled at ribosome
transcription occurs
translation occurs

1. DNA unzips in the nucleus.
RNA polymerase binds to the DNA sequence, separates the two strands and creates a single-stranded DNA molecule that will be transcripted. 

2. Transcription occurs.
Transcription is the first step of gene expression. During this process, a gene's DNA sequence is copied and a mRNA molecule is produced.

3. mRNA moves to the ribosome
The mRNA is then transferred from the nucleus to the ribosome, the organelle that serves as a site for protein synthesis.

4. Translation occurs
Translation is the process where a mRNA sequence into the amino acid sequence of a polypeptide (protein).

5. Protein assembled at ribosome.
Translation, meaning the formation of a protein, occurs on the ribosome.

The troposphere gets warmer as altitude increases.