St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 PCH1013 – ORGANIC CHEMISTRY - IV
Time : 3 hrs
Max Marks :75
U
SECTION – A (20X1=20) Answer ALL Questions I. Choose the best answer 1. The structure of tertiary structure protein is _________ a) One dimensional b) Two dimensional c) Three dimensional d) Multi dimensional 2. Peptide bond is represented by ________. a) -C NH- b) -C-O-O c) - N-H O
d) -N=C-
H
O
3. The portion of the t-RNA molecule that consumes with m-RNA is known as __________ a) Codon b) Anti codon c) Triplet d) Triplet codon 4. The molecular formula of quinine is _________. a)C 21 H 24 N 2 O 2 b)C 20 H 25 N 2 O 2 c)C 20 H 24 N 2 O 2 d)C 24 H 21 N 2 O 2 R
R
R
R
R
R
R
R
R
R
R
R
R
R
5. The Role of DCC is a) Aromatizing agent c) Hydration agent
R
R
R
R
R
R
R
R
R
R
a)
?
b)
R
R
b) Dehydrogenation agent d) Dehydration agent
6.
+
R
c)
~1~
d)
R
R
R
R
Q1/15A/11-11 7.
OH
Ph
a) Ph
+
+
+ CH2-CH2
b)
OH + c)
Ph-CH2-CH2
+
Ph
+ CH2-CH2
+
OH
OH -
d)
Ph-CH2-CH2O
-
+
H
+
8. OH
+
Ph
a)
Ph
BrMg
CHO
+
b) BrMgCH2Ph
+
OH c)
BrMg
Ph
+
d) BrMgCH Ph 2
+
9. Which one of the following is not Heterocyclic a) Imidazole b) Thiazole c) Estrone d) Flavones 10. The number of methoxy group (s) present in reserpine is a)1 b) 2 c) 4 d) 5 II. Fill in the blanks 11. The molecular formula of Hygrine is __________. 12. Dipeptide contains _________ number of peptide bond. 13. Crown ether act as _________
~2~
CH2CHO
CH2CHO
Q1/15A/11-11 14. Me
OH
Me
CN
+
15. _________ base contains Uracil III. Match the following 16. Cocaine
-
Atom economic
17. Albumin
-
Disconnection
18. Diels alder reaction
-
Heterocyclic
19. Retro synthesis
-
Alkaloid
20. Flavones
-
Protein
SECTION - B (10X2=20) Answer any TEN Questions 21. Define genetic code 22. Write the structure of cholestrol 23. Write the synthesis of dipeptide 24. Define simple protein 25. How can you protect R-COOH group? 26. What are the uses of Trimethy silylchoride? 27. Write briefly about Robinson annulations. 28. Give example for one group disconnection 29. Define logical disconnection. 30. How can you synthesis the target molecule cyclohex-3-ene carbaldehyde.
~3~
Q1/15A/11-11 31. How can you synthesis Imidazole. 32. Convert cholestrol to testosterone. SECTION - C (5X7=35) Answer any FIVE Questions 33. a) Write synthesis of reserpine b) Write briefly about nucleic acids
(4) (3)
34. Explain the following a) Merrifield synthesis b) Synthesis of tripeptide
(4) (3)
35. a) Determine the tertiary structure of proteins b) Write about polymer supported reagents
(4) (3)
36. Explain the following a) Role of PTC in organic reaction b) Uses of DIBAL c) Protection and deprotection
(2) (2) (3)
37. a) Explain1,4 disconnection with example b) Synthesis the following target molecules (i) Pentane -2,4 –dione (ii) 2,3 –dimetthybutance-2,3 diol.
(3) (2+2)
38. a) Write briefly about functional group interconversion. b) Synthesize vitaminA 1
(3) (4)
39. a) Convert the cholesterol to progesterone. b) Write briefly about oxazole.
II. Fill in the blanks. 11. The molecular formula of Hygrine is ______. 12. Dipeptide contains ______ number of peptide bond. 13. Crown ether act as ______.
a) [4+2] b) [2+2] c) [2+3] d) [8+2]. 8. Squaline is a. a) Alkaloid b) Terpenoid. c) Carbohydrate d) Protein. 9. [2+2] cycloaddition reaction will be ______ allowed.
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