Micro RNA and Gene Regulation

The video explores the role of introns and non-coding RNA, once thought to be 'junk DNA', in gene regulation. It highlights various small non-coding RNAs, focusing on micro RNA, which is crucial for gene silencing. Micro RNA, about 22 nucleotides long, is synthesized in two stages involving Drogo and Dicer proteins. It forms a complex with Argonaut protein to silence genes by binding to messenger RNA, preventing protein synthesis. The video also hints at a detailed discussion on micro RNA biogenesis in another video.

What was the initial belief about introns in our DNA?

• They were essential for protein synthesis.

• They were considered 'junk DNA' with no purpose.

• They were the main component of messenger RNA.

• They were responsible for genetic mutations.

Which of the following is NOT a type of small non-coding RNA?

• Small interfering RNA

• Micro RNA

• Peewee RNA

• Messenger RNA

What is the primary role of micro RNA in the cell?

• To replicate DNA

• To regulate gene expression

• To transport amino acids

• To synthesize proteins

Where are the sequences that code for micro RNA found?

• In exons

• In introns

• In ribosomes

• In the cytoplasm

What is the length of a typical micro RNA sequence?

• 100 nucleotides

• 50 nucleotides

• 22 nucleotides

• 10 nucleotides

Which protein is involved in the first stage of micro RNA synthesis?

• Drogo

• RISC

• Argonaut

• Dicer

What complex is formed when micro RNA binds with an Argonaut protein?

• Gene expression complex

• Protein synthesis complex

• RNA-induced silencing complex

• DNA replication complex

How does micro RNA prevent protein synthesis?

• By increasing RNA transcription

• By enhancing ribosome activity

• By creating a roadblock in messenger RNA

• By binding to DNA directly

What happens to messenger RNA when micro RNA binds to it?

• It is translated into proteins.

• It is converted into DNA.

• It is replicated.

• It is degraded or its translation is repressed.

Which protein can cut messenger RNA in two places?

• Dicer

• Argonaut

• Drogo

• RISC