8. What is the defective enzyme in the glycogen storage Von Gierke's disease?
A.Phosphorylase
B.Phosphofructokinase
C.Glucose-6-phosphatase
D.None of the above

---

9. A deficiency of the enzyme Hypoxanthine Guanine phosphoribosyl transferase (HGPRT) may cause
A.Gaucher's disease
B.Ehlers-Danlos syndrome
C.Lesch- Nyhan syndrome
D.Kleinefelter's syndrome

---

10. Which of the following sets belongs to a distinct class or category?
A.Ribose, sucrose, glucose, fructose
B.Sterols, waxes, fatty acids, amino acids.
C.Oils, sterols, waxes, fats
D.Nucleotide, nucleoside, nucleus, DNA

---