The saliva contains an enzyme called

A. ptyalin

B. pepsin

C. trypsin

D. erepsin

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  1. The two minerals required to keep teeth and bones intact and in good condition are
  2. Eye is an organ that can be called as
  3. A person with a blood group ____ is considered to be an universal donor.
  4. The animal without urinary bladder is
  5. Xerophthalmia is a deficiency disease. Deficiency of _________ causes it.
  6. Hydrotropism means the growth of roots
  7. The first person to observe the bacteria, protozoa and spermatozoa under the microscope was
  8. Blood is
  9. The following disease is prevented by triple-antigen immunization
  10. Organisms which synthesise their own food are called
  11. The term 'Fauna' means
  12. Valves are present inside
  13. The principal reason why it is better to have two eyes than one is that
  14. The part of the eye behind the lens is filled with
  15. The theory that all animals and plants are made up of cells and they could arise only from pre-existing…
  16. The small pox vaccine was discovered by
  17. Blood clot Inside blood vessels is prevented by
  18. Blood of cockroach is
  19. Vivipary is defined as germination
  20. Whooping cough is caused by
  21. DNA is found
  22. Which of the following crops helps in nitrogen fixation?
  23. Bird nu is a disease which affects and spreads through
  24. The age of a tree can be determined by
  25. The dreaded virus which, on reaching the central nervous system, produces spasms of the muscles of the…
  26. The nerve messages enter the cell through the
  27. What are the symptoms of retinal deficiency?
  28. Which one of the following acts as a communication system?
  29. The golden age of Dinosaurs was
  30. Diabetes is a disease which is