National Standard Examination in Biology (NSEB) Solved Paper 2016 Part-7

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Q: 41. When an animal is injected with an antigen A, it produces antibody response as shown:

Q 41 Image of Serum Antibody Response

Q 41 Image of Serum Antibody Response

Q 41 Image of Serum Antibody Response

If the same animal is now injected with a mixture of antigen A and B (Shown by arrow) the expected response following the injection would be:

(A)

Q 41 A Image of Antibody Response

Q 41 a Image of Antibody Response

Q 41 A Image of Antibody Response

(B)

Q 41 B Image of Antibody Response

Q 41 B Image of Antibody Response

Q 41 B Image of Antibody Response

(C)

Q 41 C Image of Antibody Response

Q 41 C Image of Antibody Response

Q 41 C Image of Antibody Response

(D)

Q 41 D Image of Antibody Response

Q 41 D Image of Antibody Response

Q 41 D Image of Antibody Response

Answer: (D)

Q: 42. Though the earliest evolved life forms were anaerobic, there was an eventual predominance of aerobe on earth. Which of the following is the most likely reason for it?

(A) Evolution of mitochondria and eukaryotic organization

(B) Evolution of photosynthetic organisms

(C) Evolution of heterotrophic organisms

(D) Evolution of terrestrial organisms

Answer: (B)

Q: 43. Colonization of land by plants was associated with the evolution of structures of obtain water and to minimize water loss. Which of the following adaptation are associated with the latter?

(i) Development of epidermis with waxy cuticle

(ii) Development of stomata with elaborate opening and closing mechanism

(iii) Development of bark on old stem and roots

(A)

(B)

(C)

(D)

Answer: (A)

Q: 44. Fats and oils are the most preferred reserved foods. Choose the correct combination of statements given below to support this:

(i) They have density lower than most other molecules in a cell

(ii) Their complete oxidation release energy greater than other organic polymers

(iii) Being hydrophobic they get clustered and use lesser space for storage

(iv) Being heteropolymeric they are the most convenient storage foods

(A)

(B)

(C)

(D)

Answer: (A)

Q: 45. The secondary structure of protein mainly owe to the amino acids that have:

(A) Sulfhydryl Group

(B) Aromatic Group

(C) Alkaline side chain

(D) Acidic side chain

Answer: (D)

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