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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, […]

Q.29 The structural basis in sponges is provided by which of the following? (1) Pinacocytes (2) Choanocytes (3) Porocytes (4) Amoebocytes Sponge Body Structure Overview Sponges (Phylum Porifera) lack true […]

Q.28 The six-kingdom classification was proposed by whom? (1) R.H. Whittaker (2) Carl Woese (3) Carolus Linnaeus (4) Herbert Land What is Six-Kingdom Classification? The six-kingdom system expands traditional taxonomy […]

Q.27 Neoteny is exhibited by :- (1) Axolotl larva (2) Zoea larva (3) Bipinnaria larva (4) Planula larva What is Neoteny? Neoteny is a form of paedomorphosis where juvenile traits […]

Q.26 Embryonic cleavage in mammals is (1) Rotational cleavage (2) Radial cleavage (3) Bilateral cleavage (4) Discoidal cleavage What is Embryonic Cleavage? Embryonic cleavage refers to the rapid series of […]

Q.25 Hormone responsible for metamorphosis in frog is :- (1) Ecdysone (2) Juvenile hormone (3) Growth hormone (4) Thyroid hormone Frog Metamorphosis Hormone: Thyroid Hormone Explained Thyroid hormone drives metamorphosis […]