MCQs of Biology: 1. Ectoderm develops into??? a. circulatory system b. nervous system c. liver d. muscles e. bones 2. Correct sequence of stages in menstrual cycle is: I. ovulation II.follicle stage III.corpus luetum stage IV.menstruation a. I-II-III-IV b. III-I-II-IV c. II-I-III-IV d. II-III-I-IV 3. Alcoholism is a a. custom b. disease c. preventive for pneumonia d. food substitute e. socially desirable “crutch” for shy teenagers 4. Alcohol serves as a stimulant to a. brain b. nerves c. vision d. judgment e. none 5. All are functions of skin except a. formation of Vit D b. sensation c. protection against entrance of bacteria d. removal of CO2 e. regulation of body temp. 6. Dermis of skin does not contain a. a layer of dead cells b. blood vessels c. nerve endings d. hair follicles e. oil glands 7. True pili are only present in??? a. Gram +ve bacteria b. Gram –ve bacteria c. both d. none 8. Auditory nerve could be affected by: a. penicillin b. streptomycin c. tetracycline d. all 9. ________ Effect inhibits reproductive capacities of the cells n maintain microbial population at constant size a. Microbicidal b. Microbistatic c. Microbial d. none 10. E.M. radiations of wavelength _______ are effective in killing micro organisms. a. above 300 nm b. below 300 nm c. nearly 300 nm d. none 11. Seras can be sterilized by means of: a. High temp. b. membrane filter c. E.M radiations d. all 12. What is da probability of a color blind daughters among da children of a man whose mother was a colorblind & a woman whose father was a color blind??? a.0% b.25% c.50% d.100% 13. Onset of birth is stimulated by???? a. ACTH b. corticosteroids c. progesterone d. oxytocin 14. Gene I encoding the ABO blood group system is located on??? a. chr 11 b. chr X c. chr 9 d. chr 19 15. Subkingdom that includes animals of all phyla except simplest anmals is: a. parazoa b. protozoa c. eumetazoa d. proterostomia 16. Whisk ferns belong to?? a. psilopsida b. pteropsida c. sphenopsida d. lycopsida 17. In _____ Y chromosome appear to have very little influence on sex??? a. grasshopper b. Drosophila c. humans d. birds 18. Trypanosome and euglena are commonly called a. zoo flagellates b. actinopods c. ciliates d. apicomplexans 19. Scientist who first brought about the artificial production of mutations through use of X-rays was a. Mendel b. Mendeleff c. Metchnikoff d. Morgan e. Muller 20. The cell of a corn plant contains a diploid number of 20 chromosomes. When it divides by mitosis, what is the number of chromosome in each of resulting cells??? a. 10 b. 15 c. 20 d. 30 e. 40 21. If a family has 4 children, 3 boys n a girl, what are the chances that the next child will be a girl?? a. 0 b. 1 in 2 c. 1 in 3 d. 1 in 4 e.1 in 8 22. ____ is not a mammal a. porpoise b. walrus c. shark d. whale e. seal 23. Pepsin is active only in presence of a. rennin b. erypsin c. amylopsin d. pepsinogen e. HCl 24. Castings are produced by a. hydra b. earthworm c. crayfish d. grass hopper e. paramecium 25. Bile is useful in digestion of a. starch b. sucrose c. fat d. protein e. amino acids 26. part of digestive system not in contact with food??? a. small intestine b. stomach c. liver d. large intestine e. trachea 27. A secretion that digests both proteins n carbohydrates is??? a. ptyalin b. saliva c. pepsin d. gastric juice e. pancreatic juice 28. Fatty acids are absorbed by a. capillaries b. lacteals c. pylorus d. thoracic duct e. colon 29. The energy requirements of different people vary. Which of the following persons would most likely have a calorie requirement of 4,700?? a. A 15 years old girl weighing 52 kg b. A clerk weighing 81 kg c. A typist weighing 58 kg d. A coalminer weighing 67 kg e. A housewife weighing 63 kg 30. As the number of neutrons in nucleus of an atom increases,,, atomic number of atom a. increases b. decreases c. remains the same d. varies with form of isotopes e. depends on the no. of electron shells 31. No. of different gene combinations possible in the gametes of a trihybrid pea plant, TtSsYy is a. 2 b.4 c.6 d.8 e.10 32. A bacillus divides every half hour, under ideal conditions of food and temp. After 4 hours what will b number of bacilli a. 4 b. 8 c. 24 d. 128 e. 256 33. A farmer plants clover on a field that had been used for corn??? a. crop rotation b. contour plowing c. reforestation d. erosion e. insect control 34. Some vanishing wildlife is beginning to reappear in previously heavily timbered areas a. crop rotation b. contour plowing c. reforestation d. erosion e. insect control 35. A farmer plows in concentric circles around a hill a. crop rotation b. contour plowing c. reforestation d. erosion e. insect control 36. A secretary takes dictation in shorthand a. tropism b. simple reflex c. instincts d. conditional response e. habit 37. A robin builds a nest a. tropism b. simple reflex c. instincts d. conditional response e. habit 38. A boy blinks as a basketball is thrown at his face a. tropism b. simple reflex c. instincts d. conditional response e. habit 39. A dog’s mouth waters when his master picks up his feeding dish a. tropism b. simple reflex c. instincts d. conditional response e. habit 40. How the strata of rock in the Grand Canyon were formed a. Petrification b. sedimentation c. mutation d. Radiation from C-14 e. evolution 41. How the bone of a dinosaur was preserved a. Petrification b. sedimentation c. mutation d. Radiation from C-14 e. evolution 42. How the horse changed through ages a. Petrification b. sedimentation c. mutation d. Radiation from C-14 e. evolution 43. How the wood of a tree turned to stone a. Petrification b. sedimentation c. mutation d. Radiation from C-14 e. refrigeration 44. How the age of the remains of primitive humans is determined a. Petrification b. sedimentation c. mutation d. Radiation from C-14 e. refrigeration 45. pH at which maltase is least reactive: a. 1 n 7 b. 1.5 n 7.9 c. 2.2 n 9.0 d. 1 n 14 e. 7 n 14 46. One way of cleaning up environment after oil spill is through use of a. fungi b. bacteria c. bacteriophage d. viruses 47. A food that may be contaminated by Hg is a. cheese b. melon c. chicken d. fish 48. Closest relative of bat is: a. robin b. seal c. crow d. penguin e. ostrich 49. Animal with a 4 chambered heart is a. lungfish b. codfish c. whale d. eel e. shark 50. A phylum characterized by radial symmetry is: a. Chordata b. Echinodermata c. Pisces d. Aves e. arthropoda good luck Regards : Entry Test Preparation