
Would alien life need to have DNA?
Try 3 issues of BBC Science Focus Magazine for £5!
The DNA molecule is the foundation of all life… as we know it.
Asked by: Wendy Beech, Lewes
Advertisement
The role of DNA is to provide instructions that allow amino acids (the building blocks of proteins needed for the processes of life) to be assembled correctly. DNA also allows those same instructions to be passed down the generations.
Advertisement
But DNA isn’t unique in this ability, as the related molecule RNA can perform similar functions. It’s also possible that alien life exploits radically different ways of achieving similar ends.
Authors

Robert MatthewsPhysicist
Robert is a science writer and visiting professor of science at Aston University.
Advertisement
Advertisement
Sponsored Deals

Subscription offers you will love!
- Spread the cost and pay just £3.50 per issue when you subscribe to BBC Science Focus Magazine.
- Alternatively, lock in for longer and pay just £37.99 per year, saving 51%!
- Risk - free offer! Cancel at any time when you subscribe via Direct Debit.
- FREE UK delivery.
SUBSCRIBE NOW
Advertisement