Tag: GATE Life Science Previous Year Papers with Solutions

Q.97 In a newly discovered organism, normal development was unaffected when a few blastomeres were removed from 100-cell stage embryo. However, removal of five cells at the 1000-cell stage abolished the […]

Q.96 A genetic experiment was performed to map the gene(s) for eye colour in a newly-discovered moth species. Sex determination in this moth species: XY – male and XX – female. […]

Q.95 Which of the following is TRUE about Kreb’s cycle? (A) Kreb’s cycle generates NADPH (B) The enzymes of Kreb’s cycle reside in the inter-membrane space of a mitochondria (C) It […]

Q.94 The term innate behavior refers to an animal behavior (A) that is triggered by an environmental change (B) that is taught by the parent (C) that is developmentally fixed […]

Q.93 Which one of the following hormones is INCORRECTLY paired with its function? (A) Melatonin – biological rhythm (B) Glucagon – increases blood glucose levels (C) Prolactin – stimulates milk secretion […]

Q.92 Which one of the following examples represents an adaptation or a physiological activity that DOES NOT minimize the loss of body temperature of animals? (A) Feathers or fur (B) Fat […]

Q.91 In insect’s tracheal system, the transport of oxygen to the target tissue is done by (A) fine branches of air tubes extending to almost every cell (B) a liquid that […]

Q.90 Which of the following is a main symptom of infection by Wuchereria bancrofti? (A) Swelling of limbs (B) Skin rashes (C) Blindness (D) Brain cyst Swelling of limbs is the […]

Q.89 Which one of the following type of immune cells is responsible for graft rejection? (A) B cells (B) T cells (C) Macrophages (D) Eosinophils T cells are responsible for graft […]

Q.88 Extraembryonic tissues are derived from which one of the following? (A) Ectoderm (B) Endoderm (C) Trophectoderm (D) Mesoderm Extraembryonic tissues are derived from the trophectoderm. This outer layer of the blastocyst […]