Protein Synthesis: The Role of DNA in Amino Acid Coding

The video explains protein synthesis, where DNA codes for proteins through a sequence of amino acids. It covers the role of DNA, RNA, and ribosomes in this process. DNA's code is transcribed into mRNA in the nucleus, which then travels to the ribosome in the cytoplasm. Here, tRNA translates the mRNA sequence into a polypeptide chain, forming proteins. Essential and non-essential amino acids are discussed, along with the processes of transcription and translation.

How many bases are in a codon?

• 6
• 4
• 1
• 3

What is an essential amino acid and how many are there?

• There are twelve essential amino acids that our bodies make

• There are 9 essential amino acids that our bodies make.

• There are three essential amino acids that our bodies can't make.

• There are nine essential amino acids that our bodies can't make.

What is the role of DNA in protein synthesis?

• It provides the energy needed for synthesis.

• It directly synthesizes proteins.

• It codes for the amino acids sequence in proteins.

• It transports amino acids to the ribosome.

What molecule carries the code from DNA to the ribosome?

• tRNA

• rRNA

• DNA polymerase

• mRNA

How does the message from the DNA (in the nucleus) get to the ribosome in the cytoplasm?

• mRNA
• cDNA
• rRNA
• tRNA

During transcription, what does RNA polymerase do?

• It synthesizes proteins.

• It transports mRNA out of the nucleus.

• It binds RNA nucleotides together.

• It replicates DNA.

What is transcription?

• Transcription is the process of converting RNA into DNA.
• Transcription is the process of synthesizing proteins from amino acids.
• Transcription is the process of making an mRNA copy of a gene's DNA sequence.

• Transcription is the process of cell division.

What determines the order of amino acids in a protein?

• The number of ribosomes in a cell.

• The type of RNA polymerase.

• The sequence of DNA bases.

• The length of the mRNA strand.

What molecules and organelles are needed to perform translation?

• ATP, mitochondria, nucleotides
• rRNA, golgi apparatus, carbohydrates
• DNA, lysosomes, lipids
• mRNA, tRNA, ribosomes, amino acids

What is tRNA's job in translation?

• Transcribe DNA into mRNA
• Initiate protein synthesis
• Proofread the mRNA sequence
• Deliver the correct amino acid to the ribosome