Trna, mrna, rrna

[brightsmiles9]

I'm having a little bit of a hard time understanding the difference between tRNA, rRna, and mRNA. Also, how in debt of microbiology should we prepare? thanks!​

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[nze82]

I'm having a little bit of a hard time understanding the difference between tRNA, rRna, and mRNA. Also, how in debt of microbiology should we prepare? thanks!​

mRNA: Single stranded RNA molecule, which is transcribed from DNA within the nucleus, and is then shipped out to the cytoplasm, where it can be translated to produce protein. mRNA is the least abundant form of RNA.

rRNA: Single stranded RNA molecule, which is transcribed from DNA within a special region of the nucleus, known as the Nucleulus. After transcription, rRNA is shipped out of the nucleus and into the cytoplasm, where it will join with specific proteins to make up the two subunits of the ribosome. rRNA is the most abundant form of RNA (Why? Proteins are almost involved in any cellular activity, so cells need to constantly produce the proteins that govern these vital tasks. Now what's the machinery used to make proteins? The answer is the ribosome. What is the ribosome made of? rRNA. So, you need lots of rRNA to make lots of ribosomes to translate lots of mRNA molecules and produce enough proteins).

tRNA: This is the smallest type of RNA, which is present within the cytoplasm. There are at least 20 types of different tRNA molecules, each of which carry a particular type of Amino Acid at their 3'-end. The tRNA recognizes the proper mRNA codon via its anti-codon end, and thereby "reads" the code and assembles the proper amino acids to produce the proper protein, during the process of translation. Unlike the other two types of RNA (mRNA and rRNA), which have a linear structure, tRNA has a clover-leaf shape.

How well should you know microbiology?
Look at Cliff's AP Biology book, and you'll find the answer to this question. What's mentioned in that book is what you want to know.

 

[tamakisuououran]

Since this is the first post that shows up when you google this topic here, I just wanted to add a little thing to the excellent explanation from nze82.
Although its true that mRNA have linear sequence and tRNA have a "clover-leaf" shape, rRNA in fact has GLOBULAR shape.