1.5-DNA, RNA, and Protein Synthesis

A mutation occurs that changes a single base in the DNA sequence from CAA to CGA. How might this impact protein synthesis and cellular function?

• The mutation will have no effect on the protein
• The amino acid sequence will change, potentially altering protein structure and function
• Only RNA transcription will be affected
• The mutation will automatically create a new protein

Which of the following best explains how different cell types can have the same DNA but perform different functions?

• Cells randomly select which genes to use
• Cells completely remove unused genes
• Cells activate different portions of the same DNA through gene expression
• Cells create entirely different DNA sequences
• Proteins are identical in all cell types

In protein synthesis, what determines whether a mutation is considered 'silent'?

• No change in amino acid sequence
• Complete protein deactivation
• Immediate cell death
• Dramatic protein shape change

How do tRNA molecules contribute to protein synthesis?

• They replicate DNA
• They carry specific amino acids to ribosomes
• They edit genetic sequences
• They produce mRNA

Which process ensures genetic information is accurately transferred from DNA to proteins?

• Transcription and translation
• Mitosis
• Meiosis
• Cellular respiration

What role do ribosomes play in protein synthesis?

• DNA replication
• Amino acid sequencing
• Gene editing
• Chromosome separation

Why is base pairing crucial in DNA and RNA processes?

• Ensures genetic code accuracy
• Increases protein complexity
• Reduces cellular energy
• Prevents genetic mutations

How do frameshift mutations potentially impact protein production?

• Completely prevent protein formation
• Alter entire reading frame
• Have no significant effect
• Increase protein complexity

What distinguishes mRNA from other RNA types during protein synthesis?

• Carries genetic instructions
• Remains in nucleus
• Produces amino acids
• Replicates DNA

Which mechanism explains cellular differentiation despite identical DNA?

• Gene expression regulation
• Random DNA deletion
• Constant protein production
• Chromosome rearrangement