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.

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$I.$ Burning of wood
$II.$ Volcanic activity
$III.$ Combustion of organic matter
$IV.$ Fossil fuels
Choose the correct option
| Trophic levels | Examples |
| $(A)$ First | $(a)$ Mon |
| $(B)$ Second | $(b)$ Wolf |
| $(C)$ Third | $(c)$ Cow |
| $(D)$ Fourth | $(d)$ Phytoplankton |