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Q.39 The area that contains at least 1500 species of vascular plants as endemic species along with at least 70% of habitat loss is designated as :- (1) National Park […]

Q.38 Which one of the following is a post-zygotic barrier in speciation? (1) Behavioral Isolation (2) Habitat Isolation (3) Temporal Isolation (4) Hybrid Sterility Post-Zygotic Barriers in Speciation: Hybrid Sterility […]

Q.37 Molecular clock concept used to measure evolutionary changes is based on: (1) 14C isotope embedded in the organic content of an organism (2) Cyclic changes in the content of […]

Q.36 Tetrapods and insects first appeared during which period? (1) Silurian (2) Ordovician (3) Devonian (4) Permian Tetrapods and Insects First Appeared in Devonian Period: Paleozoic Tetrapods (four-limbed vertebrates) and […]

Q.35 MHC-II is expressed by which of the following? (1) All nucleated cells (2) Antigen presenting cells (3) RBCs (4) All leukocytes MHC-II Expression on Antigen Presenting Cells: Immunology MCQ […]

Q.34 Cytotoxic T cells are :- (1) CD3+ CD8+ (2) CD3+ CD4+ (3) CD4+ CD8+ (4) CD8+ CD3− Correct Answer The correct answer is (1) CD3+ CD8+. All mature T […]

Q.33 Which of the following immune cells are known as polymorphonuclear (PMN) leucocytes? (1) Macrophages (2) Neutrophils (3) Monocytes (4) Eosinophils Which Immune Cells Are Polymorphonuclear PMN Leucocytes: Neutrophils Explained […]

Q.32 Histone Acetyl Transferase (HAT) acetylates which amino acid of histone? (1) Lysine (2) Histidine (3) Serine (4) Proline Histone Acetyl Transferase HAT Acetylates Lysine Histone Acetyl Transferase (HAT) specifically […]

Q.31 Which of the enzyme catalyses the formation of peptide bond between two amino acids? (1) Peptidases (2) Peptidyltransferase (3) Phosphodiesterase (4) Proteases Which Enzyme Catalyzes Peptide Bond Formation: Peptidyltransferase […]

Q.30 Methylation of Uracil forms which of the following? (1) Adenine (2) Cytosine (3) Guanine (4) Thymine What is Methylation of Uracil? Uracil (U) is a pyrimidine base in RNA, […]