Name of the Board : Tamilnadu Directorate of Government Examination
Name of the Exam : HSC – XII STD
Subject : Biochemistry
Document Type : Sample Question Paper
Website : http://dge.tn.gov.in/
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/857712BioChemistry.pdf
DGE Biochemistry Model Question Paper
Time allowed : 3 hrs
Maximum Marks : 150
Related : Directorate of Government Examination DGE Tamilnadu Class XII Bio-Botany Sample Question Paper : www.pdfquestion.in/8574.html
Instructions
Note :
i) Answer all the questions from Part I
ii) Answer any fifteen questions from Part II
iii) Answer question No.71 in Section A and any five in Section B from Part III
iv) Answer any four questions from Part IV
v) Draw diagrams and write equations wherever necessary
Model Question
Part – I :
Answer all the questions 50 * 1 = 50
A. Choose and write the correct Answer :
1. The major buffer system of red blood cells are
(a) Phosphate buffer
(b) Hemoglobin buffer
(c) Carbonate buffer
(d) Acetate buffer
2. Satiety value is high for
(a) Carbohydrates
(b) Proteins
(c) Fats
(d) Vitamins
3. Which ions are needed for glucose transport?
(a) Na +
(b) K +
(c) Mg2+
(d) Ca2+
4. Glycolysis occurs in
(a) Mitochondria
(b) Cytosol
(c) Nucleus
(d) Ribosome
5. How many irreversible steps occurs in glycolysis
(a) 2
(b) 4
(c) 3
(d) 5
6. Urea is formed from
(a) Citrulline
(b) Arigininosuccinate
(c) Arginine
(d) Ornithine
7. Niacin synthesised in the body from
(a) Phenyl alanine
(b) Tyrosine
(c) Lysine
(d) Tryptophan
8. Which one is a saturated acid
(a) Oleic acid
(b) Cerebronic acid
(c) Nervonic acid
(d) Stearic acid
9. Lysolecithin is formed by the action of ___________ an lecithin
(a) Lecithinase A
(b) Lecithinase A2
(c) Lecithinase C
(d) Lecithinase D
10. Divalent cation needed for the catalysis of DNA synthesis is
(a) Calcium
(b) Magnesium
(c) Phosphate
(d) Chloride
11. Okasaki fragments are present in
(a) Leading strand
(b) Lagging strand
(c) Both the parental strands
(d) Both the daughter strands
12. Deficiency of glucose-6-phosphatase is seen in
(a) Von-Gierk’ s disease
(b) Galactosemia
(c) Albinism
(d) Alkaptonuria
13. Abnormal proliferation of cells is seen in
(a) Neoplasm
(b) Albinism
(c) Alkaptonuria
(d) Hemophilia
14. Which of the following is the high energy compound
(a) Glyceraldehyde
(b) AMP
(c) Pyrophosphate
(d) Lactate
15. Succinate dehydrogenase in mitochondria, is a marker of
(a) Inner membrane
(b) Outer membrane
(c) Inter membrane space
(d) Matrix
16. ES complex formation is
(a) A reversible reaction
(b) An irreversible reaction
(c) An energy consuming reaction
(d) A complete reaction
17. The reciprocal form of M.M. equation was considered by
(a) Line Weaver – Burk
(b) Fischer
(c) Koshland
(d) Dixon
18. Lock and Key theory was proposed by
(a) Dixon
(b) Fischer
(c) Koshland
(d) Michaelis Menton
19. Immunoglobulin which can cross the placenta
(a) IgA
(b) IgE
(c) IgM
(d) IgG
20. In AIDS, the cells which are affected by HIV
(a) Mast cells
(b) T-helper cells
(c) T-suppressor cells
d) B-memory cells
B. Fill up the blanks :
21. Two solutions with identical osmotic pressures are called ___________
22. The lubricating property of the synovial fluid is due to the presence of ___________ in it.
23. Pancreatic lipase is also called as __________________
24. Secretin is a polypeptide with ______________ amino acids
25. ______________ is precursor for nucleotide synthesis.
26. Translocation is catalysed by the enzyme ___________________
27. Acetyl CoA is converted to malonyl CoA by the enzyme ______________
28. Erythroblastosis foetalis is caused by ____________ antigen.
C. Say True or False :
29. Facilitated diffusion is an energy dependent process.
30. Leucine is purely ketogenic amino acid.
31. Obesity is one of the causative factor of etherosclerosis.
32. Single strand binding proteins bind to double stranded DNA.
33. Benign tumours cannot spread from one part of the body to another part.
34. Blood clotting mechanism is affected in hemophilia.
35. The degree of competitive inhibition cannot be decreased by increasing the concentration of the substrate.
36. An uncompetitive inhibition has affinity towards ES complex.
37. Malonate is the competitive inhibitor of succinate dehydrogenase.
38. Interferons are responsible for fever during infection.
D. Match the following :
39. Hay’ s test – Insulin
40. Cholecystokinin – Epinephrine
41. Diabetes mellitus – GI tract hormone
42. DOPA – Surface tension
43. Transcription – Expressed by antigen presenting cells
44. MHC II – Synthesis of RNA
E. Give one word answer :
45. Name the protein that exchanges chloride and bicarbonate ions in red blood cells.
46. Why cellulose cannot be digested by humans?
47. Which protein is involved in termination of transcription?
48. Which virus causes the Burkit Lymphoma?
49. What is the other name of ATP synthetase?
50. In which part of mitochondria the ETC chain proteins are located?
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