How Genes are Expressed

Gene expression involves converting DNA information into functional proteins. It starts with transcription in the nucleus, where DNA is transcribed into RNA. The RNA is processed into mRNA, which travels to ribosomes in the cytoplasm. Here, translation occurs, assembling proteins by matching tRNA anticodons with mRNA codons, linking amino acids into a chain. The process completes when the protein is fully formed.

What is the primary product of gene expression?

• Lipids

• Carbohydrates

• Nucleic acids

• Proteins

Where does transcription occur in higher organisms?

• Mitochondria

• Ribosome

• Nucleus

• Cytoplasm

What is the role of mRNA in gene expression?

• To degrade proteins

• To synthesize lipids

• To replicate DNA

• To carry genetic instructions to ribosomes

During translation, what molecule brings amino acids to the ribosome?

• mRNA

• DNA

• tRNA

• rRNA

When is gene expression considered complete?

• When tRNA is degraded

• When the protein chain is fully assembled

• When DNA is replicated

• When mRNA is synthesized