Multiple Choice Questions

Zoology

Q: Which one of the following pairs is not exactly matched?
A) Prismatic layer of shell of Unio - Pearl formation
B) Obelia colony - Polymorphism
C) Eye of Cockroach - Mosaic vision
D) Pedicellariae of Starfish - Gill for smooth respiration
Q: Cilia and flagella consist of:
A) 7 outer fibrils around 2 central fibrils
B) 9 outer fibrils around 2 central fibrils
C) 9 outer fibrils around 1 central fibrils
D) 7 outer fibrils around 1 central fibrils
Q: Any human male who carries a sex-linked gene on the X-chromosomes will transmit that gene to:
A) 50% of his daughters
B) 50% of his sons
C) All of his daughters
D) all of his sons
Q: In Dorsophila white eye colour is sex-linked recessive character and the allelic gene for red eye dominate. A white-eyed female is mated with a red-eyed male. What percent of the female offspring can be expected to have red eyes?
A) 0
B) 0.25
C) 0.5
D) 1
Q: The law of segregation states that the two contrasting factors present together in a heterozygote:
A) Are sorted out mixed into the gametes
B) Are sorted out unmixed into the gametes
C) Are contaminated
D) Exert influence on the same structure
Q: Which of the following is not true?
A) Somatic mutation occurs in a body cell
B) Spontaneous mutations occur suddenly in nature and their origin is unknown
C) Mutations are very common in nature
D) Most of the genes are relatively stable
Q: The hydrophillic nature of DNA is due to the presence of:
A) Phosphate group
B) Deoxyribose sugar
C) Thymine base
D) A number of hydrogen bond
Q: Which of the following class comprises of mostly free-living forms?
A) Nematoda
B) Cestoda
C) Turbellaria
D) Trematoda

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