Question
Monocistronic structural genes in eukaryotes have interrupted coding sequences. Explain. How are they different in prokaryotes?
✓
Answer
- In eukaryotes, the hnRNA (primary transcript of mRNA) has coding sequences, called exons as well as non-coding sequences, called introns, i.e. the information is split.
- It undergoes a process, called splicing, in which the introns are removed and the exons are joined together in a particular manner, to form the functional mRNA.
- In prokaryotes, the mRNA is polycistronic, i.e. codes for more than one polypeptide.
- The information is continuous and no splicing is required.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Describe the signs and symptoms of amoebiasis.
Insulin in the human body is secreted by pancreas as prohormone/ proinsulin. The schematic polypetide structure of proinsulin is given below. This proinsulin needs to undergo processing before it becomes functional in the body. Answer the questions that follow:
- State the change the proinsulin undegoes at the time of its processing to become functional.
- Name the technique the American company Eli Lilly used for the commercial production of human insulin.
- How are the two polypeptides of a functional insulin chemically held together?
A factory drains its waste water into the nearby lake. It has caused algal bloom.
- How was the algal bloom caused?
- What would be the consequences?
- Name the phenomenon that caused it.
How many trophic levels human beings function in a food chain?
What is biological magnification? Explain how DDT as a water pollutant undergoes biological magnification?
- Name any of two copper releasing IUDs.
- Explain how do they act as effective contraceptives in human females.
Why is zonation more pronounced at the edges of habitat?
Where is an operator' located in a prokaryotic DNA? How does an operator regulate gene expression at transcription level in a prokaryote? Explain.
Name the host plant and its part that Meloidegyne incognita infects. Explain the role of Agrobacterium in the production of dsRNA in the host plant.
Given below is an enlarged view of onemicro sporangium of a mature anther.
- Name 'a', 'b' and 'c' wall layers.
- Mention the characteristics and function of the cells forming the wall layer 'c'.