Answer:
Topoisomerase is an enzyme which participates in the unwinding of DNA helix.
Explanation:
During transcription and DNA replication, the DNA needs to be unwound in order for the transcription/replication machinery to gain access to the DNA so it can be copied or replicate, respectively.
Answer: significantly increases risk of stroke, sudden cardiac arrest, and death.
Answer:
a. Producers
Explanation: Plants make the largest impact on the biosphere. All the other answers relate to animals which does not make such large impact.
