18. The lipopolysaccharides present in bacterial cell wall has lipid A which is connected to: (A) O-polysaccharide (B) core polysaccharide (C) both with O-polysaccharide and core polysaccharide (D) rhamnose-mannose disaccharide
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19. Molecular chaperones are a class of proteins that facilitate: (A) the proper folding of newly synthesized proteins (B) unfolding of newly synthesized proteins (C) degradation of newly synthesized proteins (D) targeting of newly synthesized proteins
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1. Embryonic stem cells are derived from: (A) fertilized embryo (B) unfertilized embryo (C) sperm (D) kidney
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20. Gas vacuoles are present in: (A) Anabaena flos-aquae (B) Bacillus subtilis (C) Acanthurus nigrofuscus (D) Mycobacterium tuberculosis
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2. Members of the antibody protein family that have common structural features are collectively known as: (A) haptens (B) allergens (C) antigens (D) immunoglobulins
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21. In the ABO blood group system, antigenic determinants are: (A) nucleic acid (B) carbohydrate (C) lipid (D) protein
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3. Apoptosis is characterized by: (A) necrosis (B) programmed cell death (C) membrane leaky syndrome (D) cell cycle arrest process
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22. The most widely used program for multiple sequence alignment is: (A) BLAST (B) FASTA (C) CLUSTAL (D) Chime
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4. Yeast artificial chromosomes (YACs) are used for cloning: (A) large segments of DNA (B) mRNA (C) bacterial DNA (D) yeast DNA
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The standard deviation for the above results (A) 2.49 (B) 2.45 (C) 2.52 (D) 2.40
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