9. Which immunoglobulin has the heaviest chains?
A) IgE
B) IgG
C) IgM
D) IgA

10. What is the shape of an immunoglobulin molecule?
A) 'Y' or 'T'
B) Circle
C) Line
D) Square

11. What are the two types of light chains in immunoglobulins?
A) Alpha and beta
B) Mu and delta
C) Kappa and lambda
D) Gamma and epsilon

12. How many amino acids are present in each heavy chain of animmunoglobulin?
A) 420-440
B) 220-240
C) 300-320
D) 520-540