The tripeptide is written as Glycyl-Alanyl-Glycine. What is its correct structure?

During the process of aerobic respiration,acetyl co-enzyme $A$ is formed from which of the following?

Which of the following statements is correct?

Which among the following statements about terpenes is $NOT$ true?

Identify the correct statements from the following:
$I)$ When $DNA$ is hydrolysed,adenine and thymine are obtained in equal quantities.
$II)$ When $RNA$ is hydrolysed,adenine and uracil are obtained in equal quantities.
$III)$ Amylose is a branched polymer with $\alpha-1 \rightarrow 4$ and $\alpha-1 \rightarrow 6$ glycosidic linkages.
$IV)$ Addison disease is due to the abnormal functioning of adrenal cortex.

Assertion : $Mg$ is not present in the enamel of human teeth.
Reason : $Mg$ is an essential element for the biological functions of humans.