Gene Expression and Protein Synthesis Quiz

What is the primary difference between genotype and phenotype?

• Genotype is determined by proteins, phenotype is determined by genes.

• Genotype and phenotype are the same.

• Genotype is the genetic makeup, phenotype is the physical appearance.

• Genotype is the physical appearance, phenotype is the genetic makeup.

What is the role of RNA polymerase during transcription?

• It unwinds DNA and synthesizes mRNA.

• It translates mRNA into proteins.

• It splices introns from mRNA.

• It synthesizes DNA from RNA.

Which sugar is found in RNA?

• Glucose

• Ribose

• Deoxyribose

• Fructose

What is the function of tRNA in protein synthesis?

• It splices mRNA.

• It carries amino acids to the ribosome.

• It forms the ribosome structure.

• It carries genetic information from DNA.

What are introns?

• Proteins that assist in splicing.

• Non-coding regions of mRNA.

• Enzymes that synthesize RNA.

• Coding regions of mRNA.

How can the same mRNA transcript lead to different proteins?

• Through different splicing of introns and exons.

• Through mutations in the mRNA.

• By changing the DNA sequence.

• By altering the ribosome structure.

What signals the start of translation?

• The formation of peptide bonds

• The presence of tRNA

• A stop codon

• A start codon

What type of bond forms between amino acids during protein synthesis?

• Hydrogen bond

• Ionic bond

• Peptide bond

• Covalent bond

What is a polypeptide?

• A single amino acid

• A chain of amino acids

• A type of RNA

• A type of DNA

How do proteins achieve their functional shapes?

• Through random folding

• By being synthesized in the nucleus

• Through the action of ribosomal RNA

• By forming hydrogen bonds and other interactions