Understanding DNA and Protein Synthesis

What are the four bases that make up the genetic code in DNA?

• A, U, G, C

• A, T, C, G

• A, U, C, G

• A, T, C, U

How many amino acids are coded by the 64 possible triplet combinations in DNA?

• 16

• 32

• 64

• 20

What is the term used to describe the genetic code's ability to have multiple codons for a single amino acid?

• Degenerate

• Universal

• Redundant

• Overlapping

What is a gene?

• A sequence of DNA that codes for a protein

• A sequence of RNA that codes for a protein

• A sequence of amino acids

• A sequence of proteins

What is the role of the start codon in protein synthesis?

• It signals the beginning of RNA synthesis

• It signals the end of protein synthesis

• It signals the beginning of a gene

• It signals the end of a gene

Which enzyme is responsible for breaking the hydrogen bonds during transcription?

• RNA polymerase

• DNA polymerase

• Ligase

• Helicase

What is a key difference between DNA and RNA?

• RNA is double-stranded

• RNA contains thymine

• RNA contains ribose sugar

• RNA is found only in the nucleus

What is the function of ribosomal RNA in translation?

• It synthesizes proteins directly

• It carries amino acids to the ribosome

• It forms the structure of the ribosome

• It carries the genetic code from DNA

What shape is transfer RNA typically described as having?

• Helix

• Clover leaf

• Linear

• Circular

What is the role of the anticodon in translation?

• It binds to the ribosome

• It binds to the messenger RNA codon

• It synthesizes amino acids

• It signals the end of translation