Question

Types of introns, location and splicing mechanism?

Types of introns, location and splicing mechanism?

Homework Answers

Answer #1

​​​​​The whole genome of eukaryotes is divided into two parts, the coding sequences called as exons are the non coding sequences called as introns.

Less than 1% of the genome is coding in nature. It undergoes transcription and translation to form functional protein products.

Rest all the sequences which we call as introns is made up of repetitive sequences, centromere, telomere and includes DNA elements like promoter, operator, terminator, enhancer etc.

Type Location Splicing mechanism
1 rRNA, organellar RNA, few bacterial RNA self splicing by transposase
2 chloroplast, mitochondrial, prokaryotes self splicing by reverse transcriptase and ribozyme
Nuclear nucleus splicing by spliceosome which includes snRNA
Transfer RNA tRNA enzymatic

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