NA types l in each blank with the correct type of RNA. Micro RNA s translated by the ribosomes and contains the code that specifies the sequence of amino acids in a polypeptide chain. Transfer RNA combines with protein to form the 2 ribosomal subunits. Messenger RNA transports amino acids to the ribosomes for use in protein synthesis. Small nuclear RNA plays a key role in the splicing reaction that removes introns from SRP RNA eukaryotic pre-mRNA RNA polymerase combines with protein to form particles that help ribosomes attach to the endoplasmic reticulum in eukaryotes. Ribosomal RNA acts to cleave target mRNAs or inhibit the translation of target mRNAs present in the cytoplasm of eukaryotes Prev 1 of 8 Next
The Correct Answer and Explanation is:
Here is the correctly completed paragraph with the appropriate types of RNA filled into each blank:
Messenger RNA (mRNA) is translated by the ribosomes and contains the code that specifies the sequence of amino acids in a polypeptide chain.
Ribosomal RNA (rRNA) combines with protein to form the 2 ribosomal subunits.
Transfer RNA (tRNA) transports amino acids to the ribosomes for use in protein synthesis.
Small nuclear RNA (snRNA) plays a key role in the splicing reaction that removes introns from eukaryotic pre-mRNA.
Signal recognition particle RNA (SRP RNA) combines with protein to form particles that help ribosomes attach to the endoplasmic reticulum in eukaryotes.
Micro RNA (miRNA) acts to cleave target mRNAs or inhibit the translation of target mRNAs present in the cytoplasm of eukaryotes.
Explanation (300+ words):
RNA, or ribonucleic acid, is a fundamental molecule involved in gene expression and regulation. Various types of RNA perform specialized functions to ensure proper protein synthesis and cellular regulation.
- Messenger RNA (mRNA): This type of RNA serves as the direct template for protein synthesis. It carries genetic information transcribed from DNA to the ribosome, where it is translated into an amino acid sequence. The ribosome reads the codons on the mRNA and assembles the corresponding amino acids to form a polypeptide chain.
- Ribosomal RNA (rRNA): rRNA combines with proteins to form the structural and enzymatic core of ribosomes. Ribosomes have two subunits (large and small), each composed of rRNA and proteins. rRNA ensures proper alignment of the mRNA and tRNAs during translation and catalyzes the formation of peptide bonds.
- Transfer RNA (tRNA): tRNA is responsible for bringing amino acids to the ribosome. Each tRNA molecule has an anticodon that pairs with a specific mRNA codon and an attached amino acid that corresponds to that codon. This matching process ensures the correct sequence of amino acids in a protein.
- Small nuclear RNA (snRNA): snRNA plays a key role in RNA splicing. It is part of the spliceosome complex that removes non-coding introns from pre-mRNA and joins coding exons, forming mature mRNA ready for translation.
- Signal recognition particle RNA (SRP RNA): This RNA is part of the SRP complex, which helps guide ribosomes translating membrane or secretory proteins to the endoplasmic reticulum. This is essential for proper protein targeting in eukaryotic cells.
- Micro RNA (miRNA): miRNAs are short, non-coding RNAs that regulate gene expression by binding to complementary sequences in target mRNAs. They can either block translation or lead to mRNA degradation, thus playing a critical role in post-transcriptional regulation.
Understanding these RNA types is crucial for grasping how genetic information is expressed and regulated in cells.