Competitive Exams: Zoology MCQs (Practice-Test 45 of 112)

  1. Consider the following processes

    1. Generation of cytotoxic T-cells

    2. Stimulation of interferon release

    3. Formation of bursin

    4. Release of opsin

    Which of the above are the functions in mammalian tissues performed by interleukin (T-cell growth factor) which is secreted by certain activated Tlymphocytes?

    1. 1 and 2 only

    2. 1 and 3 only

    3. 2 and 3 only

    4. 3 and 4 only

  2. Which one of the following is a Tyrosine derivative?

    1. Insulin

    2. Growth hormone

    3. Oxytocin

    4. Thyroxine

  3. With reference to sucrose, consider the following statements:

    1. Sucrose is a non-reducing sugar.

    2. The linkage in it is an a2-β1 glycosidic bond.

    3. It is a disaccharide having a-glucose and β-fructose.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  4. Which one of the following groups of mammals is an example of artiodactyla?

    1. Horse, Ass, Zebra

    2. Tapir, Hippopotamus, Rhinoceros

    3. Pig, Rabbit, Zebra

    4. Camel, Sheep, Hippopotamus

  5. Consider the following statements:

    1. Asterias is exclusively marine and carnivorous.

    2. In Asterias, papulae act as olfactory organs.

    3. In Asterias, the endosketeton is mesodermal in origin.

    Which of the statements given above are correct?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  6. In Aplysia sp. in addition to a pair of tentacles adjacent to mouth, a second pair of tentacles located dorsally, are called

    1. Odontophores

    2. Rhinophores

    3. Cerata

    4. Lateral cilia

  7. In the arrangement of podomeres in the walking leg of Palaeinon, the correct sequence from basis to dactylus is

    1. Merus-Ischium-Carpus-Propodus

    2. Ischium-Merus-Carpus-Propodus

    3. Propodus-Ischium-Merus-Carpus

    4. Carpus-Merus-Propodus-Ischlum

  8. Which of the following is the unicellular dinoflagellates that have symbiotically with certain corals?

    1. Zooxanthella

    2. Zoomastigophora

    3. Plasmodiophora

    4. Vampyreila

  9. With reference to Sponges which one of the following statements is correct?

    1. Sponges are triploblastic animals

    2. Well marked bilateral symmetry is exhibited by all sponges

    3. True body cavity or coelom is represented by paragastric cavity in sponges

    4. Sponges are mostly marine and a few freshwater sponges are also known

  10. Match List-I (Animal) with List-II (Larva/Larval Stage) and select the correct answer using the code given below the

    List-I List-II
    1. Aurelia

    2. Fasciola

    3. Leucosolenia

    4. Taenia

    1. Onchosphere

    2. Parenchymula

    3. Planula

    4. Cercana

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 4
      • 3
      • 1
      • 4
      • 2
      • 3
      • 3
      • 2
      • 4
      • 1
      • 3
      • 4
      • 2
      • 1
  11. Consider the following statements: The need to create a branch ‘Parazoa’ under Metazoa arose because

    1. of the recognition of the fact that sponges are unique in possessing choanocytes

    2. sponges are at the cellular grade of construction and Metazoans are at the tissue and organ grade of construction.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  12. What is Lorica in Protozoa?

    1. Modified cell membrane with several small folds

    2. A loose-fitting shell-like covering which encloses the cells

    3. Inner vacuolar region involved in storage.

    4. Criss-crossing of microfllaments in the protoplasm of the cells

  13. Match List-I (Featues) with List-II (Examples) and select the correct answer using the code given below the Lists:

    List-I List-II
    1. Blastopore becomes mouth

    2. Blastopore becomes anus

    3. Single osculum and numerous ostia

    1. Mollusca

    2. Sponges

    3. Protochordata

    • A
    • B
    • C
      • 2
      • 3
      • 1
      • 3
      • 1
      • 2
      • 1
      • 2
      • 3
      • 1
      • 3
      • 2
  14. Consider the following statements with reference to lactose (lac) operon in E. Coli:

    1. Lac enzymes are encoded in a single polycistronic mRNA molecule (lac mRNA).

    2. Cyclic AMP induces the initiation of transcription of lac mRNA.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  15. Which one of the following is correct?

    1. DNA fingerprinting and DNA footprinting are one and the same

    2. DNA fingerprinting is used to identify DNA from living organisms whereas DNA footprinting is used to identify DNA from fossils

    3. DNA fingerprinting and DNA footprinting both are used for individual identification

    4. DNA fingerprinting is used for individual identification whereas DNA footprinting is used for protein binding regions in DNA