GATE QUESTIONS - LIFE SCIENCES (XL) - ZOOLOGY (L)
Gate Questions for Zoology likely to be asked for Gate 2014 is given here. Sample Questions given here will be helpful for all writing life sciences XL paper in Gate 2014. Model Question Papers with Answers for Zoology have been prepared affter evaluating previous years questions in Gate.
ZOOLOGY (XL) - GATE 2014 - SAMPLE QUESTIONS
Trees in the equatorial region of earth supply oxygen into the atmosphere that sustains species
living in distant polar regions. This relationship is called as
(A) mutualism (B) symbiosis (C) commensalism (D) parasitism
Seasonally breeding animals and birds measure the day length, i.e. photoperiod and use these
measurements as predictive information to prepare themselves for breeding. Besides melatonin,
which of the following hormones is involved in this biological process?
(A) Gonadotropin releasing hormone (B) Growth hormone (C) Thyroxine (D) Adrenocorticotropic hormone
Red-Green color blindness is an X-linked recessive disorder. In a population which is in the HardyWeinberg equilibrium, the incidence of occurrence of this in males is 1:1000. What will be the
expected incidence of affected homozygous females?
(A) 1 in 1002000 (B) 1 in 2000000 (C) 1 in 1001000 (D) 1 in 1000000
Golgi apparatus is also termed as cellular post office, since it packages and transports cellular
proteins across various organelles and outside the cell. In general, the Golgi is perinuclear in
location and is closely associated with the endoplasmic reticulum. A chemical compound,
Monensin inhibits all trafficking from Golgi. If Golgi is visualized by immunofluorescence
microscopy after treatment with this compound, the Golgi will be
(A) absent (B) normal (C) swollen (D) fragmented
The nerve impulse at the neuromuscular junction results in discharge of acetylcholine (Ach) from
its vesicles into the synaptic cleft. Ach gets degraded by acetylcholine esterase and is present in
which one of the following locations?
(A) Post synaptic membrane (B) Both pre and post – synaptic clefts
(C) Presynaptic membrane (D) Synaptic cleft
Zygotic genes required for the formation of a group of adjacent segment in the developing
Drosophila embryo is called
(A) Maternal gene (B) Pair rule gene (C) Homeotic gene (D) Gap gene
Increasing estradiol (E2) hormone from ovarian follicles prior to ovulation has been hypothesized
to play a critical role for induction of pheromones. These pheromones render females sexually
receptive to males to facilitate mating. An investigator performs experiments in sheep in which
females are gonadectomized, then treated with E2 or vehicle alone and allowed to breed. Which
one of the findings listed below will validate the hypothesis that pheromones are induced by E2?
(A) Sexual receptivity is regained only in vehicle treated females.
(B) Sexual receptivity is regained only in E2 treated females
(C) Sexual receptivity was regained irrespective of E2 treatment
(D) Sexual receptivity is not regained by any treatment
A typical receptor senses extracellular stimuli by virtue of its localization on plasma membrane.
The receptor to which of the following ligands is an exception to this rule?
(A) g(gamma)-amino butyric acid (B) Acetylcholine (C) Estrogen (D) Luteinizing hormone
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