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Q.5 B-lymphocytes originate from the bone marrow whereas T-lymphocytes originate from (A) thymus (B) bone marrow (C) spleen (D) liver B-lymphocytes originate in bone marrow, while T-lymphocytes originate from bone […]

Q.4 Identification of blood groups involves (A) precipitation (B) neutralization (C) opsonization (D) agglutination Blood group identification relies on agglutination, where antibodies cause clumping of red blood cells bearing matching […]

Q.3 Idiotypic determinants of an antibody are associated with the (A) constant region of the heavy chains (B) constant region of the light chains (C) variable region (D) constant regions […]

Q.2 The basis for blue-white screening with pUC vectors is (A) intraallelic complementation (B) intergenic complementation (C) intragenic suppression (D) extragenic suppression Blue-white screening in pUC vectors relies on intraallelic […]

Q.1 In mismatch correction repair, the parental DNA strand is distinguished from the daughter strand by (A) acetylation (B) phosphorylation (C) methylation (D) glycosylation In mismatch repair, the parental DNA […]

Q.65 The active site in the alpha/beta barrel structures is usually located (A) inside the barrel                              […]

Q.64 The amino acid substitution matrices in decreasing order of stringency for comparing protein sequences are (A) PAM250, PAM120, PAM100 (B) PAM100, PAM120, PAM250 (C) PAM250, PAM100, PAM120 (D) PAM120, […]

Q.63 A dioecious plant has XX sexual genotype for female and XY for male. After double fertilization, what would be the genotype of the embryos and endosperms? (A) 100% ovules […]

Q.62 Which of the following statements with respect to the orientation of the nitrogenous bases to the pentose sugars, and the puckering of the sugar, is correct? (A) Anti, and […]

Q.61 If protoplasts are placed in distilled water, they swell and burst as a result of endosmosis. The plot representing the kinetics of burst is Introduction When protoplasts (plant cells […]