Competitive Exams: Zoology MCQs (Practice-Test 49 of 112)

  1. Given below are animals which are included in the group Amniota in animal kingdom. Which one of the following is the correct amniote group?

    1. Calotes, Columba, Oryctolagus

    2. Rana, Bufo, Salamandra

    3. Branchiostoma, Balanoglossus, Molgula

    4. Myxine, Scoliodon, Lepidosiren

  2. In Scoliodon the placoid scales are firmly attached with the underlying connective tissue by

    1. Dentine layer

    2. Myeline fibres

    3. Sharpey's fibres

    4. Elasmin fibres

  3. Consider the following statements related to Sycon:

    1. The spongocoel in Sycon opens to the exterior by prosopyle.

    2. The spicules which constitute, the skeleton of Sycon develop from choanocytes.

    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

  4. In the arterial system, right systemic arch becomes predominant in

    1. Scoliodon

    2. Oryctolagus

    3. Protopterus

    4. Columba

  5. In chordates, when are the primary egg membranes formed?

    1. When the egg remains within ovary

    2. When the egg is discharged from ovary

    3. When the egg passes through oviduct

    4. When the egg passes out of oviduct

  6. With reference to. The respiratory oxidation of glucose molecule, consider the following statements:

    1. When glucose is converted to glucose-6-phosphate, two ATP molecules are used.

    2. When phosphoenol pyruvic acid is converted to pyruvic acid, two ATP molecules are formed.

    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

  7. The first vertebrates appeared in which one of the following periods of the Palaeozoic era?

    1. Ordovician

    2. Silurian

    3. Devonian

    4. Mississippian

  8. The Km value (Michaelis constant) refers to which one of the following

    1. Threshold value

    2. One half of the maximum reaction velocity

    3. Maximum reaction velocity

    4. Near maximum reaction

  9. Which. Of the following enzymes catalyse inter-conversion of optical isomers?

    1. Epimerases

    2. Ligases

    3. Lyases

    4. Stearases

  10. Which one of the following is the correct sequence of steps involved in the degradation of uric acid?

    1. Uric acid-Allantoin-Allantoic acid-Urea-Glyoxylic acid-Ammonia

    2. Uric acid-Allantoic acid-Allantoin-Urea-Glyoxylic acid-Ammonia

    3. Uric acid-Glyoxylic acid-Urea-Allantoic acid-Allantoin-Ammonia

    4. Uric acid-Urea Glyoxylic acid-Allantoin-Allantoic acid-Ammonia

  11. Match List-I with. List-II and select the correct answer using the code given below the lists

    List-I (pH) List-II (Body fluids)
    1. 2.0

    2. 7.4

    3. 6.5

    4. 8.0

    1. Blood

    2. Pancreatic secretion

    3. Gastric secretion

    4. Urine

    • A
    • B
    • C
    • D
      • 3
      • 2
      • 1
      • 4
      • 3
      • 1
      • 2
      • 4
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 3
  12. Consider the following:

    1. Loss of coordination

    2. Tremor

    3. Paralysis of affected body parts

    In case of multiple sclerosis of myelinated neurons in the CNS, which of the above neurological disorders are manifested in man?

    1. 1, 2 and 3

    2. 1 and 2 only

    3. 2 and 3 only

    4. 1 and 3 only

  13. Which one of the following is a diagnostic test for detecting Folk acid deficiency?

    1. Hay's test

    2. Figlu excretion test

    3. Rother's test

    4. Benzidine test

  14. A limited amount of niacin can be synthesized in the human body from

    1. Alanine

    2. Valine

    3. Arginine

    4. Tryptophan

  15. Which one of the following vitamins acts as coenzyme for reducing ribonucleotides to deoxyribonucleotides and also helps in the formation and maturation of RBCs?

    1. Vitamin C

    2. Nicotinamide

    3. Vitamin B2

    4. Vitamin B12