Protein Synthesis and Genetic Code

The video provides a quick review of protein synthesis, detailing the two main steps: transcription and translation. Transcription occurs in the nucleus, where DNA is converted into mRNA with the help of RNA polymerase. This mRNA then travels to the ribosome, where translation occurs. During translation, tRNA brings amino acids to the ribosome, matching codons on the mRNA to form proteins. These proteins are then processed and transported through the endoplasmic reticulum and Golgi apparatus before being released from the cell via exocytosis.

What are the two main steps involved in protein synthesis?

• Transcription and Translation

• Replication and Transcription

• Replication and Translation

• Translation and Replication

Where does transcription occur within a cell?

• Cytoplasm

• Ribosome

• Nucleus

• Endoplasmic Reticulum

What enzyme is responsible for breaking apart hydrogen bonds during transcription?

• RNA polymerase

• Helicase

• DNA polymerase

• Ligase

What is the role of mRNA in protein synthesis?

• To replicate DNA

• To synthesize proteins directly

• To carry the genetic code from DNA to the ribosome

• To transport amino acids

What is a codon?

• A sequence of three amino acids

• A sequence of three mRNA bases

• A sequence of three DNA bases

• A sequence of three tRNA bases

Where does translation occur in the cell?

• Golgi apparatus

• Ribosome

• Mitochondria

• Nucleus

What is the function of tRNA during translation?

• To carry the genetic code

• To synthesize proteins

• To unwind DNA

• To bring amino acids to the ribosome

What happens to proteins after they are synthesized?

• They are immediately functional

• They are degraded

• They are processed and transported through the endoplasmic reticulum and Golgi apparatus

• They are stored in the nucleus

What is the role of the Golgi apparatus in protein synthesis?

• To transport mRNA

• To replicate DNA

• To package and fold proteins into their correct shape

• To synthesize proteins

What process releases proteins into the extracellular space?

• Exocytosis

• Endocytosis

• Phagocytosis

• Pinocytosis