MCQ LIFE SCIENCE 05.07.2021

1. In addition with amylase with ion causes the destruction of bacteria in mouth

a) K⁺                

b) thiocyanate             

c) Salicyalate               

d) b and c

 

2.What is common among amylase, rennin and trypsin ?

a) All proteins                                    

b) Proteolytic enzymes

c) Produced in stomach                      

d) Act at p^H lower than 7.

 

3.Match the columns

Column I	Column II
a  Saliva b  Gastric juice c  Pancreatic juice d  Intestinal   -     -	p Disaccharides q Trypsin r Ptyalin s Pepsin t Cellulase

a) a – r, b – t, c – p, d – p                    b) a – s, b – r, c – p, d – t

c) a – r, b – s, c – p, d – t                    d) a – r, b – s, c – q, d – p

 

4.Which one is incorrectly matched

a) Vit C – scurvy                                 

b) VIt. B₂ – Pellagra

c) Vit. B₁₂ – Pernicious anaemia         

d) Vit. B₆ – Beri beri.

 5. Gallastone surgery sometimes requires that the gallbladder be remove. Patients are then advised to avoid ingesting large amount of fat because

a) the gallbladder makes bile, which is necessary for fat emulsification.

b) without the bile produced by the gallbladder, fats cannot be enzymatically.hydrolyzed.

c) the gallbladder produces the hormone entergastrone.

d) the gallbladder stores large quantities of bile, releasing it when necessary.

 

6. What is the Cholecysistokinin ?

a) enzyme        

b) bile – pigment         

c) gastro-intestinal hormone                

d) lipid

 

7.Vitamin D is synthesized in skin, by the action of sunlight on

a) cholesterol                                       

b) cephano-cholesterol

c) 7-hydroxy cholesterol                     

d) all of the above

 

8.The following is a scheme showing the fate of carbohydrates during digestion in the human alimentary canal. Identify the enzymes acting at stages indicated as A, B, C and D. Choose the correct option from those given.

a) A = amylase, B = maltase, C = lactase, D = invertase

b) A = amylase, B = maltage, C = invertase, D = lactase

c) A = amylase, B = invertase, C = maltase, D = lactase

d) A = amylase, B = lactase, C = maltage, D = invertase

 

9. The shortest part of digestive system is

a) small intestine         

b) pharynx                   

c) large intestine          

d) oesophagus

 

10. The contraction of gall bladder is due to

a) cholecystokinin       

b) enterogastrone        

c) gastrin                     

d) secretin

 

11. Payer’s pathches produce

a) mucous                    

b) lymphocytes            

c) trypsin                     

d) enterokinase

  

12. Brunner’s gland is found in

a) ileum                       

b) stomach                  

c) duodenum               

d) oesophagus

 

13. Crypts of Leiberkuhn secretes

a) bile juice                  

b) gastric juice             

c) succus entericus      

d) sacculus rotundus

 

14. Bile can be prevented to pass into duodenum by

a) Pyloric valve                                               

b) Sphincter of Boyden

c) Sphincter of Oddi                                       

d) Cardiac sphincter

 

15. Emulsification of fat is carried out by

a) Bile pigments          

b) Bile salts                 

c) Hcl                          

d) Pancreatic juice

 

16.176. Proteolytic enzymes are

a) Pepsin, trypsin and peptidase                     

b) Amylopsin, steapsin and ptyalin

c) Amylase, lipase and zymase                       

d) Zymase, dehydrogenase and urease

 

17. Lipase hydrolyses

a) Ester bond               

b) Glycosidic bond     

c) Peptide bond           

d) Hydrogen bond

 

18. Balanced diet should have

a) Protein 1/5, fat 3/5, carbohydrate 1/5         

b) Protein 3/5, fat 1/5, carbohydrate 1/5

c) Protein 1/2 , fat 1/4, carbohydrate ¼          

d) Protein 1/5, carbohydrate 3/5.

 

19. Which one is the correct match ?

a) Calcium – beriberi                                       

b) Na – Addison’s disease

c) Iron – haemophilia                                      

d) P – bone fragility

 

20. Animals do not synthesise

a) Proteins                   

b) Vitamins                 

c) Unaffected              

d) Stopped

 

21. In small intestine, active absorption occurs in case of

a) Glucose                   

b) Amino acids            

c) Na⁺                          

d) All the above

22. Ultrafiltration of process can be used for

a) fractionation of proteins                 

b) desalting

c) harvesting of cells                          

d) selective removal of solvents

 

23. The number in a typical mammalian cell is

a) 40 – 200     

b) 400              

c) 1000 – 2000            

d) 50000 – 100000

24. What product will result from complete hydrolysis of soluble dextran ?

a) Sucrose only                                    

b) Fruclose only

c) Glucose and fruelose only              

d) Glucose only

25. Aeration in a bioreactor is provided by

a) impeller       

b) baffles         

c) sparger         

d) all of the above 

 26. Which of the following hormones has the broadest range of targets ?

a) ADH                       

b) TSH                                    

c) epinephrine              

d) ACTH        

 

27. Every time you eat a cookie or candy bar, your blood sugar increases. This triggers an increase in the hormone

a) insulin          

b) epinephrine             

c) adrenocorticotropin(ACTH)           

d) glucagon

 

28. Injections of a hormone are sometimes given to strengthen contractions of the uterus during childbirth. What hormone might this be ?

a) adrenocorticotropin(ACTH)                       

b) thyroxin

c) oxytocin                                                      

d) follicle-stimulating hormone (FSH)

 

29.Among the following, which are not peptide hormone

a) ARH, MSH                                                 

b) Oxytocin, ACTH

c) Calcitonin,, ADH                                        

d) TSH, LTH, FSH

 

30. Relaxin is secreted by

a) Anterior Pituitary                                        

b) Posterior pituitary

c) Corpus Luteum                                           

d) Grafian follicle

 

31. Which among the following is gastro-intestinal hormone

a) Insulin                     

b) Glucagons               

c) Serotonin                 

d) Secretin

 

32. Among the following which hormone binds to the membrane receptors

a) Thyroxin                  

b) Estrogen                  

c) testosterone             

d) Votamin D3

 

33. Cam mechanism is observed in plants having

a) water stress             

b) Salt stress                

c) No Stress                 

d) Oxygen stress

 

34. A strong peptide bond is present in arginine and aspartic acid. This Bond will be weak if arginine is being replaced by

a) Glutamic Acid        

b) Lysine                     

c) Histidine                 

d) Proline

 

35. In Beta Valgaris, the storage product of photosynthesis is

a) Glucose                   

b) Fructose                  

c) Sucrose                    

d) Starch

 

36. In photosynthesis, the conversion of PGA into PGAL requires :

a) NADPH₂                 

b) ATP                                    

c) Both a and b          

d) NADH₂

 

37.Which elements play important role in photolysis of water ?

a) Mg and Mo             

b) Mg and Cl              

c) Mn and Cl               

d) Fe and Mn

 

38. Dimorphic chloroplasts are found in

a) Sugar beet               

b) Sugarcane              

c) Rice                         

d) Wheat

 

39.Which one of the following pigments is characteristically not found in the chloroplast ?

a) ChlorophyII                        

b) Anthocyanin           

c) b-carotene               

d) Violaxanthin

 

40. An example of photosynthetic inhibitor is

a) DCMU                    

b) DCPIP                    

c) NaHCO₃                 

d) None of these

 

41. A water soluble pigment is

a) Carotene                  

b) Anthocyanin           

c) Violaxanthin           

d) Chlorophy

 

42.Manufacturing of fructose in C₄ pathway is found in

a) Guard cells              

b) Mesophyll cells       

c) Bundle sheath         

d) Palisade tissue

 

43. In dark reaction :

6CO₂ + A + 12NADPH  + H⁺ ® C₆H₁₂O₆ + 6H₂O + B + 18H₃PO₄  + 12 NADP

A and B are respectively :

a) 6 ATP and 6 ADP                                      

b) 6 ADP and 6 ATP

c) 18 ADP and 18 ATP                                  

d) 18 ATP and 18 ADP

 

44. Which of the following technique was used by Calvin for tracing the pathway of photosynthesis ?

a) Chromatography     

b) Electrophoresis       

c) SEM                        

d) Spectrophotomentry

 

45. Solarisation of chlorophyll is

a) Photoreduction       

b) Photo-oxidation      

c) Oxido-reduction     

d) Photolysis

 

46. RUBISCO behaves like an oxygenase when

a) Temperature is increased                             

b) Co₂  is reduced

c) O₂/CO₂ ratio is increased                            

d) All of these

  

47. Which of the following acts to inhibit lutenzing hormone secretion ?

a) pitressin                   

b) inhibin                     

c) thyrotropin              

d) luteotropin

 

48. Which hormone is responsible for ovulation ?

a) LH                           

b) FSH                                    

c) oestrogen                 

d) testosterone

  

49. The scientific name of zebu is

a) Bos indicus             

b) Bombyx mori         

c) Gallus gallus            

d) Bubalus bubalis

 

50.Aflatoxicosis of poultry is caused by

a) A. flavus                

b) A. fumigatus           

c) Candida albicans     

d) Rhizopus rhizopus

 

51. Which of the following fish was introduced in India by foreigners ?

a) Labeo rohita            

b) pomphret                 

c) Mystus singala        

d) Clasius batrachus

 

52. Liver oil is obtained from

a) liver of fish              

b) liver of poultry        

c) liver of cow             

d) both ‘1’ and ‘2’

 

53.Waggle dance of honey bee indicates the direction of

a) enemy                      

b) mating call              

c) food source             

d) all of these

54.What is the role of a second messenger in hormone action ?

a) It signals a cell to secrete a hormone

b) It informs a gland as to whether its hormones are having an effect

c) It relays a hormone’s messenger inside a target cell

d) It stops hormone action when it is no longer needed

 

55.The endocrine and nervous systems share which of the following in common ?

a) Both utilize feedback

b) Several chemicals serve as both hormones and neurotransmitters

c) Nerve impulses can cause endocrine glands to release hormone

d) all of the above

 

56.Type I diabetes mellitus

a) an autoimmune disease that develops following immune attack on pancreatic cells

b) a commonly seen in overweight individuals older than forty.

c) is treated by improving insulin receptor efficiency rather than by giving insulin.

d) is the most common form of the disease; more than 90% of all diabetics have type I.

 

57. It takes much longer for sex hormones and other steroids to produce their effects than it takes nonsteroid hormones. Why ?

a) Steroids are bigger, slower molecules.

b) Steroids usually must be carried longer distances by the blood.

c) Steroids cause target cells to make new proteins, which takes time.

d) Steroids must relay their message via a second messenger.

 

58.Nocotinamide-ribose-phosphate-adenine are the components of

a) NAD                       

b) NADP                     

c) CoA                                   

 d) FAD

59.Cells of meristemoid are best described as

a) differentiated and diving                

b) dedifferentiated and diving          

c) differentiated and diving                

d) dedifferentiated and non dividing

60.Which of the following genes are involved in Immortalization of primary hepatocytes ?

a) Telomerase and Cyclin D                

b) NFxB and Thymidine kinase

c) Cyelin D and myc                           

d) Telomerase and Ras