Question

1. proteins are some of the most important molecules that make - up living things. collectively they do the majority of the work in organisms to give them their structure and function. nearly all of life uses the same processes during transcription and translation, yet species and even individuals within a species can be very different in their structure and function. explain how organisms could be so different from each other even if they use the same processes of transcription and translation. some organisms use the nucleotide t while others use the nucleotide u. different organisms, even within a species, use a different genetic code table to convert mrna into amino acid sequence. different organisms have unique dna sequences, which means they will have different versions of genes. different organisms, such as dogs and cats, have different types of rna polymerases, which result in different traits.

Explanation:

• Analyze Option 1: DNA has T, RNA has U. All organisms follow this, so this doesn't explain differences.
• Analyze Option 2: The genetic code is nearly universal across life, so different code tables aren't the reason.
• Analyze Option 3: Different organisms (and individuals) have unique DNA sequences (different genes/alleles). During transcription/translation, these unique DNA sequences lead to different mRNA and then different proteins, resulting in different structures and functions. This explains the differences.
• Analyze Option 4: RNA polymerases have conserved functions across organisms (e.g., in transcription). Differences in RNA polymerases aren't the main reason for organismal differences.

Answer:

The correct option is: Different organisms have unique DNA sequences, which means they will have different versions of genes.