ZOOLOGY -PAGE 5

1. Which of the two components constitute an ecosystem?
(a). Animals and Plants
(b). Abiotic and Biotic factors
(c). Producers and Consumers
(d). Consumers and Decomposers
Answer : Abiotic and Biotic factors

2. Role of placenta is
(a). To protect embryo from sound waves
(b). To provide nutrition for developing embryo
(c). To act as storage organ
(d). To convey nerve impulses
Answer : To provide nutrition for developing embryo

3. Which of the following statements is true of viruses?
(a). Viruses are not controlled by tetracycline antibiotic
(b).Viruses have only one type of nucleic acid
(c).Viruses have a cell wall
(d). Viruses can reproduce only within the host cell
Answer: Viruses can reproduce only within the host cell

4. Galapagos islands are associated with the visit of
(a). Alfred Wallace
(b). Charles Darwin
(c). Edward Jenner
(d). Jean Lamarck
Answer : Charles Darwin

5. Inheritance of acquired character comes under
(a). Darwinism
(b). Haeckel's law
(c). Lamarckism
(d). Mutation theory
Answer : Lamarckism

6. Caudal fistula of Man is an example for
(a). Atavism
(b). Environmental Manipulation
(c). Mutation
(d). Natural Selection
Answer : Atavism

7. Which one of the following is correctly matched?
(a). Lamarck -   Natural selection
(b). Darwin -   Survival of the fittest
(c). DeVries -   Recapitulation theory
(d). Haeckel-    Mutation
Answer : Darwin-  Survival of the fittest

8. Small scale organic evolution is called
(a). Microevolution
(b). Megaevolution
(c). Macroevolution
(d). Metaevolution
Answer : Microevolution

9. Positive Rheotaxis is an adaptation found in
(a). Cave animal
(b). Desert animal
(c). Forest animal
(d). Fresh water animal
Answer : Fresh water animal

10. Shallow Water region of the shore is called
(a). Benthic Zone
(b). Littoral Zone
(c). Neritic Zone
(d). Sublittoral Zone
Answer : Neritic Zone

11. Who proposed the following statement?
"Changes in phenotype could determine the genotype of future generations"
(a). Darwin
(b). Hardy
(c). Henry Bates
(d). Lamarck
Answer : Lamarck

12. The abyssal zone of ocean is characterized by
(a). Presence of sunlight and producers
(b). Absence of sunlight and all living organisms
(c). Absence of sunlight and presence of consumers and decomposers
(d). Absence of sunlight and presence of producers
Answer : Absence of sunlight and presence of consumers and decomposers

13. Connecting link between reptile and mammal is
(a). Archaeopteryx
(b). Echidna
(c). Peripatus
(d). Calotes versicolor
Answer : Echidna

14. Coacervates were experimentally produced by
(a). Jacob and Monod
(b). Fisher and Huxley
(c). Urey and Miller
(d). Sidney Fox and Oparin
Answer : Sidney Fox and Oparin

15. Cristae are associated with which one of the following?
(a). Plasma membrane
(b). Lysosome
(c). Mitochondria
(d). Nucleus
Answer : Mitochondria

16. Mutation theory was proposed by
(a). Aristotle
(b). Bonnet
(c). Devries
(d). Haeckel
Answer : Devries

17. According to the Neo-Darwinian theory, which is responsible for the origin of new species
(a). Survival of fittest
(b). Mutation with Natural selection
(c). Biotic factors
(d). Reproduction
Answer : Mutation with Natural selection

18. When members of aspecies occupying the same area are isolated by geographical isolating mechanism they are called as
(a). allopatric
(b). parapatric
(c). sympatric
(d). sibling
Answer : sympatric

19. The study of evolution Biston betularia is an example for
(a). analogy
(b). atavism
(c). homology
(d). industrial melanism
Answer : industrial melanism

20. The largest and most successful group of organisms on earth are
(a). Anthropods
(b). Birds
(c). Fishes
(d). Protozoans
Answer : Anthropods

21. Stanley Miller by his experiment demonstrated the formation of
(a). Ammonia
(b). Amino acids
(c). Proteins
(d). Carbohydrates
Answer : Amino acids

22. In biosphere, distribution of animals is not affected by
(a). Physical barrier
(b). Climatic barrier
(c). Biological barrier
(d). Atmosphere
Answer : Atmosphere

23. Placental mammals descended from an ancestral form called
(a). Gaintnura
(b). Gymnura
(c). Kimnura
(d). Prototheria
Answer : Gymnura

24. In gene cloning the plasmid is a
(a). Vector
(b). F-factor
(c). Receptor
(d). Col factor
Answer : Vector

25. The process of a collection of copies of mRNA fragments is called
(a). Gene
(b). cDNA library
(c). Splicing
(d). Protoplast fusion
Answer : cDNA library

26. Select the correct statement with respect to diseases and immunization
a) If due to some reason B and T lymphocytes are damaged, the body will not produce antibodies against a pathogen
b) Injection of dead/inactivated pathogens caused passive immunity
c) Certain protozoans have been used in mass production of hepatitis B vaccine.
d) Injection of snake antivenom against snake bite is an example of active immunization.
Ans: A

27. Which one of the following statements is correct with respect to immunity?
a) The antibodies against small pox pathogen are produced by T – lymphocytes
b) Antibodies are protein molecules each of which has four light chains.
c) Rejection of a kidney graft is the function of B – lymphocytes.
d) Preformed antibodies need to be injected to treat the bite by a viper snake.
Ans: D

28. During sewage treatment, biogas are produced which includes
a) Methane, hydrogen sulphide, carbon dioxide
b) Methane, oxygen, hydrogen sulphide
c) Hydrogen sulphide, methane, sulphur dioxide
d) Hydrogen sulphide, nitrogen, methane
Ans: A

29. What gases are produced in anaerobic sludge digesters?
a) Methane and CO2 only
b) Methane, hydrogen sulphide and CO2
c) Methane, hydrogen sulphide and O2
d) Hydrogen sulphide and CO2
Ans: B

30. Match the following list of microbes and their importance:
A)Saccharomyces cerevisiae (i)Production of immunosuppressive agents
B)Monasus purpureus (ii)Ripening of Swiss cheese
C)Trichoderma polysporum (iii)Commercial production of ethanol
D)Propionibacterium shermanii (iv)Production of bloodcholesterol lowering agents.
a) (iv) (iii) (ii) (i)
b) (iv) (ii) (i) (iii)
c) (iii) (i) (iv) (ii)
d) (iii) (iv) (i) (ii)
Ans: D

31. Study the four statements given below and select the two correct ones out of them.
a) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers.
b) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates.
c) Predators ultimately lead to the extinction of prey species.
d) Production of chemicals such as nicotine, strychnine by the plants is metabolic disorders.
The two correct statements are
a) (B) and (C)
b) (C) and (D)
c) (A) and (D)
d) (A) and (B)
Ans: D

32. Which two of the following changes usually tend to occur in the plain dwellers when they move to high altitudes(3500 m or more)?
A) Increase in red blood cell size
B) Increase in red blood cell production
C) Increased breathing rate
D) Increase in thrombocyte count
a) (B) and (C)
b) (C) and (D)
c) (A) and (D)
d) (A) and (B)
Ans: D

33. Consider the following four conditions and select the correct pair of them as adaptation to environment in desert lizards. The conditions:
A) Burrowing in soil to escape high temperature.
B) Losing heat rapidly from the body during high temperature
C) Bask in sun when temperature is low
D) Insulating body due to thick fatty dermis.
a) (A) and (C)
b) (B) and (D)
c) (A) and (B)
d) (C) and (D)
Ans: A

ZOOLOGY -PAGE 5

UPSC Study Materials​MCQs for Competitive Examinations

UPSC Study Materials
MCQs for Competitive Examinations