Biology Questions and Answers for Competitive Exams

Here are top 100 Biology Questions and Answers or all competitive exams. These questions are useful for any competitive exam like IAS, Bank PO, SSC CGL, RAS, CDS, UPSC exams, and all state-related exams. Candidates can check Biology General Knowledge Questions and practice daily.

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Best Biology Questions with Answers for All Competitive Exams

In this section you will get the best and most expected Biology GK questions. These questions are very unique and new, Upcoming examinations. We cover all topics (Botany and Zoology) MCQ Online Test. Practice regularly to get good marks in your exam in (Biology GK MCQ Section).

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Biology GK Questions Answers MCQ

Q1: Which of the following substances act as fuel in the human body?
(A) Protein
(B) Vitamin
(C) Carbohydrate
(D) Water

Ans: (C) Carbohydrate

Q2: The capsules cover is made by –
(A) Protein
(B) Egg peel
(C) Cellulose
(D) Starch

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Ans: (D) Starch

Q3: The major component of honey is-

(A) glucose
(B) Sucrose
(C) Maltose
(D) Fructose

Q4: Which of the following sugars provide immediate energy?
(A) lactose
(B) Cellulose
(C) Maltose
(D) glucose

Ans: (D) glucose

Q5: Which of the following gives the athlete more energy quickly?
(A) fat
(B) Vitamin
(C) Protein
(D) Carbohydrate

Ans: (D) Carbohydrate

Q6: How many amino acids are required to make protein?
(A) 10
(C) 20
(B) 15
(D) 25

Ans: (C) 20

Q7: What makes tissues in the body?

(A) Protein
(C) Carbohydrate
(B) fat
(D) Vitamin

Ans: (A) Protein

Q8: What is an enzyme basically?
(A) Carbohydrate
(C) lipids
(B) Protein
(D) amino acids

Ans: (B) Protein

Q9: In accelerating the process of chemical reaction in biological systems responsible substance is-

(A) Bacteria
(C) enzyme
(B) D.N.A.
(D) Protein

Ans: (C) enzyme

Q10: The percentage of protein in soybean is-
(A) 42%
(C) 60%
(B) 50%
(D) 80%

Ans: (A) 42%

Q11: Which does not contain protein?
(A) Meat
(B) Milk
(C) Rice
(D) Pulses

Ans: (C) Rice

Q12: Which of the following is the largest source of protein?
(A)
(C) Peas
(B) Gram
(D) Soybean

Ans: (D) Soybean

Q13: Where is the fat stored in the human body-
(A) oozing skin
(B) Adipose tissue
(C) liver
(D) in epithelium

Ans: (B) Adipose tissue

Q14: Which of the following food gives the most energy per gram
(A) Protein
(C) Carbohydrate
(B) fat
(D) Vitamin

Ans: (C) Carbohydrate

Q15: Who has propounded the word ‘vitamin’?
(A) Darwin
(C) Funk
(B) Pasteur
(D) Landeck

Ans: (C) Funk

Q16: Which of the following is called defensive material?
(A) Vitamin
(C) Carbohydrate
(B) Protein
(D) fat

Ans: (A) Vitamin

Q17: Carrot is a rich source of which vitamin?

(A) Vitamin A
(C) Vitamin D
(B) Vitamin C
(D) Vitamin E

Ans: (A) Vitamin A

Q18: Vitamin A is stored in the human body at-
(A) liver
(C) spleen
(D) abdominal
(B) In the stomach

Ans: (A) liver

Q19: The chemical name of Vitamin E is-
(A) Retinol
(C) Pyridoxine
(B) Riboflavin
(D) Tocopherol

Ans: (D) Tocopherol

Q20: The blood clot in the human body is made up of which vitamin?
(A) Vitamin K
(C) Vitamin E
(B) Vitamin D
(D) Vitamin C

Ans: (A) Vitamin K

Q21: Which of the following is present in the teeth?
(A) Protein
(C) Carbohydrate
(B) calcium
(D) Minerals

Ans: (B) calcium

Q22: Which of the following minerals is most needed to control heartbeat?
(A) Sodium
(B) Sulfur
(C) Potassium
(D) Iron

Ans: (C) Potassium

Q23: Seaweeds are the main source of
(A) Iron
(B) Chlorine
(C) Bromine
(D) Iodine

Ans: (D) Iodine

Q24: What is the average percentage of oxygen in the human body?

(A) 25%
(C) 40%
(B) 30%
(D) 65%

Ans: (D) 65%

Q25: What is found in spinach leaves?

(A) Vitamin
(C) Carbohydrate
(B) Iron
(D) fat

Ans: (B) Iron

Q26: Which is rich in iron?
(B) eggs
(D) Milk
(A) Orange
(C) Green Vegetables

Ans: (C) Green Vegetables

Q27: Anemia is caused due to deficiency of-
(A) Iodine
(C) Iron
(B) calcium
(D) Zinc

Ans: (C) Iron

Q28: Which body part is affected by typhoid?
(A) Pancreas
(B) stomach
(D) brain
(C) intestine

Ans: (C) intestine

Q29: The protozoa responsible for dysentery is-
(A) Entamoeba
(C) Photographic
(B) Amoeba
(D) Trypanosoma

Ans: (A) Entamoeba

Q30:What causes cholera?
(A) Bacteria
(C) fungus
(B) Virus
(D) Algae

Ans: (A) Bacteria

Q31: ELISA test is done to check which of the following?
(A) Gonorrhea
(C) tuberculosis
(B) Diabetes
(D) AIDS

Ans: (D) AIDS

Q32: Which of the following causes tooth loss?
(A) Zinc
(C) Fluorine
(B) Iron
(D) copper

Ans: (C) Fluorine

Q33: Which image device is used to detect kidney stones?

(A) Tomography
(C) Ultrasound
(B) CT scan
(D) C.A.T. Scan

Ans: (B) CT scan

Q34: poisoning of which heavy metals cause liver cirrhosis
Does it
(A) Copper
(B) lead
(C) Mercury
(D) Zinc

Ans: (A) Copper

Q35: Inadequate supply of blood in the human body is called-
(A) Ischemia
(C) Hemostats
(B) Hyperemia
(D) Hemorrhage

Ans: (A) Ischemia

Q36: Typhoid is produced by-

(A) Pseudomonas species
(B) Staphylococcus species
(C) Bacillus Species
(D) Salmonella Ty phi

Ans: (D) by Salmonella Typhi

Q37: B. C. G. Immunization use for

(A) For measles
(C) Diphiria
(B) For T. B.
(D) For leprosy

Ans: (B) For T. B.

Q38: Which of the following diseases is not caused by water?

(B) Typhoid
(D) Amebiasis
(A) Flu
(C) Cholera

Ans: (A) Flu

Q39: Pneumonia disease affects which part of the human body?
(A) intestine
(B) bone mass
(D) Lunga
(C) liver

Ans: (D) Lunga

Q40: Which of the following is not soluble in fat?
(A) Vitamin A
(C) Vitamin E
(B) Vitamin B
(D) Vitamin K

Ans: (B) Vitamin B

Q41: Which of the following decreases in anemia?
(A) Hemoglobin
(C) Hyoglobin
(B) Riboflavin
(D) Carotene

Ans: (A) Hemoglobin

Q42: Deficiency of which vitamin is the main cause of night blindness?

(A) Vitamin A
(C) Vitamin C
(B) Vitamin B,
(D) Vitamin D

Ans: (A) Vitamin A

Q43: Whose scientific name is Thiamine?

(A) Vitamin C
(C) Vitamin B1
(B) Vitamin A
(D) Vitamin D

Q44: The best source of Vitamin C is-
(A) Apple
(B) Mango
(C) Amla
(D) Milk

Q45: The chemical name of Vitamin C is-
(A) citric acid
(C) Oxalic acid
(B) ascorbic acid
(D) Nitric acid

Ans: (B) ascorbic acid

Q46: Bleeding of gums is caused due to deficiency of which vitamin?
(A) Vitamin A
(C) Vitamin C
(B) Vitamin B
(D) Vitamin D

Ans: (C) Vitamin C

Q47: Which vitamin is found in abundance in fish liver oil?
(B) Vitamin C
(D) Vitamin E
(A) Vitamin A
(C) Vitamin D

Ans: (C) Vitamin D

Biology – Questions and Answers for Entrance Examination

1. For which among the following is not a true fruit?   

A.  Apple
B.  Date
C.  Grape
D.  Plum

Answer : D.  Plum

2. Which of the following is least infectious?  

A. leprosy
B. hepatitis
C. tuberculosis
D. conjunctivitis

Answer : A. leprosy

3. Which of the following is not a mosquito-borne disease?   

A.  Dengue fever
B.  Malaria
C.  Sleeping sickness
D.  Filariasis

Answer : C.  Sleeping sickness

4. In certain amino acids, which one of the following elements is found in addition to carbon, hydrogen, nitrogen and oxygen?  

A.  Phosphorus
B.  Zinc
C.  Calcium
D.  Sulphur

Answer : D.  Sulphur

5. Among the following elements, which one is essential for the transmission of impulses in the nerve fibre?   

A.  Calcium
B.  Iron
C.  Sodium
D.  Zinc

Answer : A.  Calcium

6. The vitamin which is very liable and easily destroyed during cooking as well as storage is  

A.  Vitamin A
B.  Vitaminb6
C.  Vitamin C
D.  Vitamin K

Answer : C.  Vitamin C

7. The compound used in anti-malarial drug is  

A.  Aspirin
B.  Neoprene
C.  Isoprene
D.  Chloroquin

Answer : D.  Chloroquin

8. Which of the following is a skin disease?  

A.  Anaemia
B.  Pellagra
C.  Osteomalacia
D.  Rickets

Answer : B.  Pellagra

9. The richest source of vitamin D is  

A.  Cod liver oil
B.  Spinach
C.  Milk
D.  Cheese

Answer : A.  Cod liver oil

10. Which of the following tests helps in diagnosis of cancer?  

A.  X-ray
B.  Urine test
C.  Blood test
D.  Biopsy test

Answer : D.  Biopsy test

11. Which one of the following is an enzyme?  

A.  Glucagon
B.  Insulin
C.  Somatotropin
D.  Trypsin

Answer : D.  Trypsin

12. Which vitamin is provided by sunlight to the body?  

A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D

Answer : D. Vitamin D

13. The deficiency of which of the following leads to dental caries?  

A.  Iron
B.  Copper
C.  Fluorine
D.  Zinc

Answer : C.  Fluorine

14. Healing of wounds is hastened by vitamin  

A.  A
B.  E
C.  C
D.  K

Answer : C.  C

15. Which of the following diseases is caused by the bite of a mad dog?  

A.  Hydrocele
B.  Hydrophobia
C.  Hydrocephatus
D.  Hydroperitoneum

Answer : B.  Hydrophobia

16. Which of the following vegetable proteins is considered as good as an animal protein?  

A.  Soyabean protein
B.  corn protein
C.  Wheat protein
D.  Bengal gram protein

Answer : A.  Soyabean protein

17. Carotene in Indian cow’s milk causes  

A.  Creamish white colour
B.  yellow colour
C.  deep yellow colour
D.  no change

Answer : B.  yellow colour

18. A woman who weighs 45 kg and whose work involves a lot of physical exertion needs  

A.  2800 calories per day
B.  3000 calories per day
C.  25000 calories per day
D.  3700 calories per day

Answer : B.  3000 calories per day

19. Foot and mouth disease is found in  

A.  Cats and dogs
B.  Cattle
C.  Poultry
D.  Humans

Answer : B.  Cattle

20. Which one of the following is a primate?  

A.  Bear
B.  Otter
C.  Loris
D.  Pangolin

Answer : C.  Loris

21. To which one of the following types of organisms do mushrooms belong?  

A.  Algae
B.  Ferns
C.  Fungi
D.  Lichens

Answer : C.  Fungi

22. Food wrapped in newspaper is likely to get contaminated with  

A.  Lead
B.  Aluminium
C.  Iron
D.  Magnesium

Answer : A.  Lead

23. Which one of the following produces seeds but no flowers?  

A.  Cashew nut
B.  Coffee
C.  Ground nut
D.  Pine

Answer : C.  Ground nut

24. Which one of the following plants is used for green manuring in India?  

A.  Wheat
B.  Sunhemp
C.  Cotton
D.  Rice

Answer : B.  Sunhemp

25. The combination of foods providing protein quality nearest to that of meat is  

A.  Wheat, dal and groundnuts
B.  Bread and butter
C.  Sprouted gram and groundnuts
D.  Groundnuts and jiggery

Answer : C.  Sprouted gram and groundnuts

26. Which one of the following disease is Inheritable?  

A.  Leukaemia
B.  Colour blindness
C.  Malignancy
D.  Hepatitis

Answer : B.  Colour blindness

27. Which one of the following elements are present in all proteins? 1. Carbon 2. Hydrogen 3. Oxygen 4. Nitrogen  

A.  2 and 3
B.  1,2 and 4
C.  1,3 and 4
D.  1,2,3 and 4

Answer : D.  1,2,3 and 4

28. For which one among the following diseases no vaccine is yet available?  

A.  Tetanus
B.  Malaria
C.  Measles
D.  Mumps

Answer : B.  Malaria

29. Which of the following vitamins is synthesised in the body by intenstinal bacteria?  

A.  vitamin B1
B.  vitamin B4
C.  vitamin D
D.  vitaminsK

Answer : D.  vitaminsK

30. BCG vaccination (Bacillus Calmette Guerine) is injected to get immunity from  

A.  Polio
B.  Cholera
C.  Small pox
D.  Tuberculosis

Answer : D.  Tuberculosis

31. In which one of the following, antibody formations take place?  

A.  RBC’s
B.  Blood platelets
C.  Blood Plasma
D.  Donnan’s membrane

Answer : C.  Blood Plasma

32. From the evolutionary point of view, which one of the following is closer to man?  

A. Dolphin
B. Flying fish
C. shark
D. tortoise

Answer : A. Dolphin

33. How do most insects respire?  

A.  through skin
B.  through gills
C.  by lungs
D.  by trachea system

Answer : D.  by trachea system

34. Which one of the following part of human brain is the regulating centre for swallowing and vomiting?  

A.  Cerebellum
B.  cerebrum
C.  medulla oblongata
D.  pons

Answer : C.  medulla oblongata

35. Production of which one of the following is a function of the liver?  

A.  Lipase
B.  Urea
C.  Mucus
D.  Hydrochloric acid

Answer : B.  Urea

36. During sleep a man’s blood pressure  

A.  Increases
B.  decreases
C.  remains constant
D.  fluctuates

Answer : D.  fluctuates

37. Oncogene is responsible for  

A. Aids
B. typhoid
C. malaria
D. cancer

Answer : D. cancer

38. Which acid is produced when milk gets sour?  

A.  Acetic acid
B.  Tartaric acid
C.  Lactic acid
D.  Butyric acid

Answer : C.  Lactic acid

39. Two richest kown sources of edible protein are  

A.  Meat and eggs
B.  Milk and vegetables
C.  Soyabean and groundnut
D.  Some algae and other micro-organisms

Answer : C.  Soyabean and groundnut

40. Which nutrients are most likely to be affected by food processing and storage?  

A.  Carbohydrates
B.  Fats
C.  Proteins
D.  Vitamins

Answer : D.  Vitamins

41. Which one of the following parts of the pitcher plant becomes modified into a pitcher?  

A.  Stem
B.  leaf
C.  stipule
D.  petiole

Answer : B.  leaf

42. In which one of the following animals is respiration done by skin?  

A.  Flying fish
B.  Sea horse
C.  Frog
D.  Chameleon

Answer : C.  Frog

43. Which one of the following bacteria helps in improving the soil fertility?  

A.  Clostridium
B.  Rhizobium
C.  Salmonella
D.  Staphylococcus

Answer : B.  Rhizobium

44. Which chamber of human heart pumps fully oxygenated blood to aorta and hence to the body? 

A.  Right Auricle
B.  Left Auricle
C.  Right Ventricle
D.  Left Ventricle

Answer : D.  Left Ventricle

45. Which one of the following is a vitamin?  

A.  Citric acid
B.  Folic acid
C.  Glutamic acid
D.  Linoleic acid

Answer : B.  Folic acid

46. Which one of the following is responsible for converting milk into curd?  

A.  Fungi
B.  Bacteria
C.  Virus
D.  None of these

Answer : B.  Bacteria

47. In which one of the following animals is skin a respiratory organ?  

A. Cockroach
B. Frog
C. shark
D. Whale

Answer : B. Frog

48. A typical human ribcage consists of how many ribs?  

A.  12
B.  14
C.  16
D.  24

Answer : D.  24

49. What is the pH level of blood of a normal person?  

A.  4.0 – 4.5
B.  6.45 – 65.5
C.  7.35 – 7.45
D.  8.25 – 8.35

Answer : C.  7.35 – 7.45

50. Which of the following disease is not a caused by viruses?  

A.  Cholera
B.  Chickenpox
C.  Hepatitis
D.  Measles

Answer .  A.  Cholera

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