- B
- C
- A
- C
5. When researchers discovered the unusually small circular DNA during sequencing, what initial explanation did they propose for its presence, before confirming it was real?
Trecho do texto: we suspected this tiny circular genome might be some kind of artifact
O candidato não poderá transcrever o trecho, utilizando “We”
– They thought/suspected it might be an experimental artifact.
6. Researchers identified several unusually large, membrane-associated proteins in the microbe’s genome. Considering their structure and location, what is the most likely function of these proteins?
Trecho do texto: … and determine what exactly the microbe’s proteins do, including several huge, membrane-associated ones that may relate to how it interacts with its host.
A pergunta se refere a proteínas, então se o candidato usar o termo “microbe may interact” deve considerar parcial a nota da resposta.
– The proteins may interact with its host.
7. B
8. C
9. D
10. A
11. Why is reversible protein phosphorylation described as a “biological amplifier” in the text?
Answer: Because one hormonal signal can activate a cascade of kinases, multiplying the effect and producing a large cellular response.
12. According to the text, how can reversible phosphorylation be involved both in normal regulation and in disease?
Answer: It normally regulates metabolism and immune defense, but its imbalance can cause cancer or transplant rejection.
Observação: As questões de múltipla escolha valem 0,75 e as questões discursivas valem 1,0 cada.
