The enzymes formed by a bacteriophage that rupture the bacterial cell wall are known as:

From which cells was $DNA$ first identified as a weakly acidic substance with an unknown function?

$A$ bacterium grown on a medium containing radioactive Sulphur incorporates the radioactivity into:

What name did Friedrich Miescher give to the substance he identified as $DNA$?

Analyze the following experimental steps performed by Frederick Griffith:
$I - R$ strain $\rightarrow$ injected into mice
$II - S$ strain $\rightarrow$ injected into mice
$III - S$ strain (heat-killed) $\rightarrow$ injected into mice
$IV - S$ strain (heat-killed) $+ R$ strain (live) $\rightarrow$ injected into mice
In which of the above stages will the mice remain alive?

Explain the role of the following scientists in the discovery of $DNA$:
$1.$ Friedrich Miescher $(1869)$
$2.$ Maurice Wilkins and Rosalind Franklin