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Paha777 [63]
3 years ago
15

Indicate at which step of the replication-transcription-translation process each type of RNA first plays a role. During which st

ep of the replication-transcription-translation process does each type of RNA first play a role
Biology
2 answers:
kolezko [41]3 years ago
6 0

Answer:

<h2> Replication: DNA  into DNA, and RNA primer are required;</h2><h2>Transcription/RNA processing: pre mRNA and then mRNA;</h2><h2>Translation: tRNA, rRNA</h2>

Explanation:

1. During replication,  a semi-conservative copy of a DNA molecule is made with the help of various enzymes and RNA primer.

2. Transcription/RNA processing: mRNA

During transcription, the DNA "message" ( in the form of codon) is copied into  mRNA.

3. Translation: tRNA, rRNA

During translation, the information carried in the mRNA is translated into protein with the help of molecules of tRNA and rRAN to build a protein on the ribosomes.

MaRussiya [10]3 years ago
6 0
<h2>Role of RNA </h2>

Explanation:

Replication-Transcription-Translation process:

  • In case of prokaryotes a single type of RNA Polymerase synthesizes all types of RNA (mRNA, rRNA and tRNA) whereas in case of eukaryotes three different types of RNA Polymerase synthesize different types of RNA
  • RNA Polymerase I transcribe all types of rRNA except 5S rRNA
  • RNA Polymerase II transcribe all types of mRNA and most of snRNA and miRNA
  • RNA Polymerase III transcribe all types of tRNA, 5S rRNA
  • During the process of transcription ( DNA to mRNA) mRNA is synthesized which carries the genetic information from DNA
  • rRNA is required for the synthesis of ribosomes, ribosomes are ribonucleoprotein complex that actively participate in protein synthesis and found in all living cells
  • A functional ribosome consists of two subunits:
  • Smaller subunit decode genetic information present in mRNA whereas large subunit has peptidyl transferase activity; in bacteria peptidyl transferase activity present in 23S rRNA while in eukaryotes present in 28S rRNA
  • Small and large subunit of ribosomes are associated to each other during translation initiation whereas essentially dissociate during translation termination
  • tRNA are small (75-95 nucleotide long) in eukaryotes transcribed by RNA Polymerase III, function of tRNA includes transfer of activated amino acid from cytoplasm to the active site of ribosomes

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