Question

proteins are made in ribosomes, but dna is stored in the nucleus. how does rna help in this process? rna copies dna and transports it to ribosomes for protein synthesis. rna changes the dna sequence to create new proteins. rna breaks down dna so that proteins can be formed. rna helps in the replication of dna before protein synthesis.

Explanation:

• Option 1: RNA (specifically mRNA) copies DNA through transcription and transports the genetic information to ribosomes for protein synthesis (translation). This is correct as per the central dogma of molecular biology.
• Option 2: RNA does not change the DNA sequence. Mutations (not normal RNA - related processes) can change DNA sequences. So this option is incorrect.
• Option 3: RNA does not break down DNA. Enzymes like DNases break down DNA. So this option is incorrect.
• Option 4: RNA is not involved in DNA replication for protein - synthesis. DNA polymerase is the main enzyme for DNA replication. So this option is incorrect.

Answer:

RNA copies DNA and transports it to ribosomes for protein synthesis.