MCQ
What are the DNA sequences that code for protein known as?
- AIntrons
- BExons
- CControl regions
- DIntervening sequences
Explanation:
DNA initially transcribed to messenger RNA, consists of coding sequences which are called as exons which codes for proteins and non-coding sequences which are called as introns.

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| Column - $I$ | Column - $II$ |
| $(a)$ Parasitism | $(i)$ $++$ |
| $(b)$ Commensalism | $(ii)$ $+-$ |
| $(c)$ Amensalism | $(iii)$ $0+$ |
| $(d)$ Mutualism | $(iv)$ $0-$ |
$R$ : Genetic modification of organisms can have unpredictable results when such organism are introduced into the ecosystem.