Competitive Exams: Zoology MCQs (Practice-Test 91 of 112)

  1. The wobble hypothesis is based on the fact that the

    1. number of t-RNA molecules is much less than 64, which happens to be the number of codons coding for various amino acids

    2. three codons are responsible for initiating and terminating polypeptide chains

    3. codon AUG codes for amino acid methionine, while it also initiates polypeptide chain

    4. amino acid leucine is coded by as many as 6 codons

  2. RNA can sometimes by copied into DNA. This process is facilitated by

    1. ribozyme

    2. RNA primase

    3. reverse transcriptase

    4. RNA polymerase

  3. Which one of the following sub-processes does not take place during protein synthesis in Eukaryotes?

    1. Translocation of m-RNA relative to ribosomes

    2. Elongation

    3. Methionine formylation

    4. Termination

  4. Which one of the following is a shelled protozoan?

    1. Balantidium

    2. Nyctotherus

    3. Noctiluca

    4. Elphidium

  5. Assuming that the first sponges originated from protozoans, which of the following type (s) of protozoa may be responsible for the origin of sponges?

    1. A colonial flagellate.

    2. A solitary amoeboid parasite.

    3. A syncitial ciliate.

    4. A colony of sporozoa

    Select the correct answer using the codes given below:

    1. 2, 3 and 4

    2. 1 alone

    3. 2 and 3

    4. 3 alone

  6. Which one of the following orders of class Hydrozoa significant in having well represented medusoid generation, which can be with or without polypoid stage?

    1. Hydroida

    2. Milliporina

    3. Stylasterina

    4. Trachylina

  7. Mehli's glands ate found in

    1. Planaria

    2. Taenia

    3. Ascaris

    4. Nereis

  8. The above diagram represents the top view of a developing egg at 8-cell stage of cleavage. Which one of the following groups of animals has this kind of cleavage?

    1. Platyhelminthes

    2. Echinodermate

    3. Ctenophora

    4. Cnidaria

  9. Filariasis is caused by

    1. Ancylostoma

    2. Ascaris

    3. Dracunculus

    4. Brugia

  10. The above diagram is that of an early stage of a developing annelid. The space marked ‘X’ in the diagram represents

    1. a gastrovascular cavity

    2. an enterocoelous coelom

    3. a schizocoelous coelum

    4. an archenteron

  11. Match List-I (Annelida) with List-II (their examples) and select the correct answer

    List-I List-II
    1. Polychaeta

    2. Hirudinea

    3. Archiannelida

    4. Oligachaeta

    1. Nereis

    2. Acanthobdella

    3. Polygordius

    4. Pheretima

    • A
    • B
    • C
    • D
      • 2
      • 1
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
  12. Which one of the following insects is known to be primitively apterous?

    1. Pediculus

    2. Cimex

    3. Xenopsylla

    4. Lepisma

  13. Match List-I with List-II and select the correct answer:

    List-I List-II
    1. Sea slug

    2. Greenhouse slug

    3. Squids

    4. Tooth shells

    1. Scaphopoda

    2. Nudibranchia

    3. Pulmonata

    4. Cephalopoda

    • A
    • B
    • C
    • D
      • 4
      • 2
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
      • 2
      • 3
      • 4
      • 1
      • 2
      • 3
      • 1
      • 4
  14. Which one of the following pair is NOT correctly matched?

      • Asteroidea
      • Asterias
      • Echinoidea
      • Astropecten
      • Holothuroidea
      • Cucumaria
      • Crinoidea
      • Antedon
  15. The type of palate in ducks is

    1. Aegithognathus

    2. Desmognathus

    3. Schizognathus

    4. Dromeognathus