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  • Question
  • Oxyreductases, transferases, hydrolases, lyases, isomerases and ligases are all classes of


  • Options
  • A. hormones
  • B. enzymes
  • C. proteins
  • D. vitamins

  • Correct Answer
  • enzymes 


  • Biology problems


    Search Results


    • 1. Process of cell division can take place by

    • Options
    • A. heterosis
    • B. fusion
    • C. mitosis
    • D. None of these
    • Discuss
    • 2. One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

    • Options
    • A. Having waited a day, it is too late to take an antibiotic
    • B. You need an antiseptic, not an antibiotic
    • C. You need to be vaccinated instead of taking an antibiotic
    • D. You are infected by a virus
    • Discuss
    • 3. Plants hormone that induces cell division is

    • Options
    • A. auxins
    • B. gibberellins
    • C. kinins
    • D. domins
    • Discuss
    • 4. Pollen grains in plants are produced in

    • Options
    • A. roots
    • B. leaves
    • C. flower
    • D. stem
    • Discuss
    • 5. Most common disease of poultry in India is

    • Options
    • A. fowl pox
    • B. tick fever
    • C. ranikhet
    • D. coryza
    • Discuss
    • 6. Pigmentation of skin is due to

    • Options
    • A. lymphocytes
    • B. monocytes
    • C. leucocytes
    • D. melanocytes
    • Discuss
    • 7. Pollination is best defined as

    • Options
    • A. transfer of pollen from anther to stigma
    • B. germination of pollen grains
    • C. growth of pollen tube in ovule
    • D. visiting flowers by insects
    • Discuss
    • 8. Ozone hole refers to

    • Options
    • A. hole in ozone layer
    • B. decrease in the ozone layer in troposphere
    • C. decrease in thickness of ozone layer in stratosphere
    • D. increase in the thickness of ozone layer in troposphere
    • Discuss
    • 9. Where is the Railway Staff College located?

    • Options
    • A. Pune
    • B. Allahabad
    • C. Vadodara
    • D. Delhi
    • Discuss
    • 10. Sun Temple is situated at?

    • Options
    • A. Konark
    • B. Bangalore
    • C. Haridwar
    • D. Kerala
    • Discuss


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