Competitive Exams: Zoology MCQs (Practice-Test 34 of 112)

  1. Consider the following substances:

    1. Glycolipids

    2. Phospholipids

    3. Sterols

    Which of the above are commonly present in the plasma membrane and other cell membranes?

    1. 1 and 2

    2. 1, 2 and 3

    3. 2 and 3

    4. 1 and 3

  2. Which one of the following statements is not correct?

    1. Barbara McClintock recognized and named nudeolar organizers in the chromosomes

    2. Kennedy arid Lehninger showed that the citric acid cycle, oxidative phosphorylaton and fatty acid oxidation take place in mitochondria

    3. By the grafting experiments with Acetabularia, Hammer ling firmly established the role of nucleus in heredity

    4. Morgan and Muller showed that chromosomes contain DNA

  3. Consider the following statements

    1. Microtubules are found only in animal cells

    2. Microtubules are made up of a protein called myosin

    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. With reference to cell cycle, which one of the following statements is not correct?

    1. When viewed through the light microscope, during G1 phase, chromatin is distinguishable as discrete chromosomes

    2. During G1 phase, synthesis of RNA and proteins takes place

    3. During S phase, replication of DNA occurs

    4. During G2 phase synthesis of RNA and proteins continues

  5. Consider the following statements:

    1. The first gene to be isolated was the lac operon of E. Coil

    2. Restriction end nucleases can restrict infection of bacteria by bacteriophages by degrading the viral DNA

    Which of the statements given above is/are correct?

    1. 1only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

  6. Consider the following intermediates formed during Kreb's cycle

    1. a-Ketoglutarate

    2. Isocitrate

    3. Succinate

    4. Malate

    5. Fumerate

    The correct sequence in which the above intermediates are formed is

    1. 1, 2.4, 3, 5

    2. 2, 1, 5, 4, 3

    3. 3, 1, 2, 5, 4

    4. 2, 1, 3, 5, 4

  7. If mild toxin is introduced into a cell, which one of the following will be mainly responsible for the detoxification process?

    1. Lysosomes

    2. Plasma membrane

    3. Endoplasmic reticulum

    4. Golgi complex

  8. Coronate larva is the characteristic larva of

    1. Phoronida

    2. Brachiopoda

    3. Hemichordata

    4. Bryozoa

  9. Consider the following processes:

    1. Breakdown of extra-cellular materials by releasing enzymes into the surrounding medium

    2. Digestion of material taken up by phagocytosis or pinocytosis

    3. Digestion of parts of the cell by autophagy

    4. Massive production of membrane glycoproteins, ribophorins I and II for the stabilization of lysosomal investment

    Which of the above is/are function (s) of lysosomes

    1. 1only

    2. 2 and 4

    3. 1, 2 and 3

    4. 2, 3 and 4

  10. Which one of the following is an elongated worm-like bodied amphibian with terminal cloaca, embedded dermal scales, protrusible copula Tory organ and no limbs?

    1. Necturus

    2. Salamandra

    3. Lchthyophis

    4. Cryptobranchus

  11. Which one of the following is the correct statement?

    1. The species of Peripatus is found north of Tropic of Cancer

    2. Plague is transmitted from rats to humans by Xenopsylla spp

    3. Cyclops is the intermediate host for filarial parasites

    4. The house fly larva has distinct head and thoracic limbs

  12. Which one of the following is an amniotes with biconcave lens-like gill pouches, round and permanently open mouth; skin without scales, fins without fin rays and without genital ducts?

    1. Ambystoma

    2. Petromyzon

    3. lchthyophis

    4. Hippocampus

  13. Which one of the following statements is correct?

    1. The living fossil called Latimeria belongs to Crossopterygii

    2. Electric organs are absent in Electrophorus

    3. The larval form of Scoliodon is called leptocephalus

    4. Heteropneustes fossilis is a lobefinned fish

  14. Which one of the following urochordates is bioluminiscent?

    1. Salpa

    2. Doliolum

    3. Pyrosoma

    4. Herdmania

  15. Consider the following statements:

    1. The eggs of Ostrich are incubated by only female parent

    2. Clavicles are absent in Rhea

    3. Kiwi is nocturnal and feeds on insects and worms

    Which of the above statements are correct?

    1. 1and 2

    2. 2 and 3

    3. 1 and 3

    4. 1, 2 and 3