MCQs with Solutions for all Competitive Examinations

Biology MCQs for Competitive Examination

Q. 1
Haemoglobin is an important constituent of 

(A) White blood cell
(B) Red blood cell
(C) Plasma
(D) All options are correct

Answer: (B) Red blood cell
Explanation: N/A

Q. 2
The longest bone in the human body is

(A) Tibia
(B) Fibula
(C) Stapes
(D) Femur

Answer: (D) Femur
Explanation: N/A

Q. 3
Xylem helps in transportation of which of the following?

(A) Water
(B) Food
(C) Nutrients
(D) Both food and water

Answer: (A) Water
Explanation: N/A

Q. 4
Five kingdom classification was given by

(A) Rober Whittaker
(B) Carolus Linneus
(C) Ernst Mayr
(D) Martinus Beijerinck

Answer: (A) Robert Whittaker
Explanation: N/A

Q. 5
Female Anopheles Mosquitos cause which of the following disease? 

(A) Malaria
(B) Chickenpox
(C) Black fever
(D) Cholera

Answer: (A) Malaria
Explanation: N/A

Q. 6
Which of the following trees shed their leaves once in a year?

(A) Coniferous trees
(B) Deciduous trees
(C) Evergreen trees
(D) Both Coniferous and Deciduous

Answer: (B) Deciduous trees
Explanation: N/A

Q. 7
Which of the following carries oxygen to various parts of the human body?

(A) Red blood cell
(B) Plasma
(C) White blood cell
(D) Nerves

Answer: (A) Red blood cell
Explanation: N/A

Q. 8
The kidneys perform which of the following function in a human body?

(A) Respiration
(B) Excretion
(C) Digestion
(D) Transporation

Answer: (B) Excretion
Explanation: N/A

Q. 9
Who discovered bacteria?

(A) Robert Hooke
(B) Robert Koch
(C) Robert Brown
(D) Antonie Van Leeuwenhoek

Answer: (D) Antonie Van Leeuenhoek
Explanation: N/A

Q. 10
Which of the following is responsible for the transportation of food and other substances in plants?

(A) Xylem
(B) Phloem
(C) Chloroplast
(D) None of these

Answer: (B) Phloem
Explanation: N/A

Q. 11
Male mosquitoes feed on

(A) Human blood
(B) Standing water
(C) Sap of plants
(D) Dung and debris

Answer: (C) Sap of plants
Explanation: N/A

Q. 12
Polio is caused by

(A) Bacteria
(B) Virus
(C) Protozoa
(D) Fungus

Answer: (B) Virus
Explanation: N/A

Q. 13
Potato is a

(A) Root
(B) Stem
(C) Bud
(D) Fruit

Answer: (B) Stem
Explanation: N/A

Q. 14
Which hormone regulates the amount of glucose in the human body?

(A) Glucagon
(B) Thyroxin
(C) Oxytocin
(D) Insulin

Answer: (D) Insulin
Explanation: N/A

Q. 15
Scurvy is caused due to the deficiency of which vitamin?

(A) Vitamin C
(B) Vitamin A
(C) Vitamin K
(D) Vitamin B-12

Answer: (A) Vitamin C
Explanation: N/A

Q. 16
DOTS is a treatment given to the patients suffering from

(B) Polio
(C) Hepatitis
(D) Tuberculosis

Answer: (D) Tuberculosis
Explanation: N/A

Q. 17
The largest Artery in human body is

(A) Aorta
(B) Vena Cava
(C) Pulmonary Artery
(D) Pulmonary Vein

Answer: (A) Aorta
Explanation: N/A

Q. 18
Nitrification is a biological process that converts

(A) Nitrogen into Nitrate
(B) Ammonia into Nitrite
(C) Nitrogen into Nitrite
(D) Ammonia into Nitrogen

Answer: (B) Ammonia into Nitrite
Explanation: N/A

Q. 19
With which of the following body organ pacemaker is associated?

(A) Brain
(B) Lungs
(C) Heart
(D) Kidney

Answer: (C) Heart
Explanation: N/A

Q. 20
Anaemia is caused because of deficiency of which of the following?

(A) Calcium
(B) Cobalt
(C) Sodium
(D) Iron

Answer: (D) Iron
Explanation: N/A

Q. 21
The branch of biology that deals with the study of cell is called

(A) Histology
(B) Cytology
(C) Morphology
(D) Anatomy

Answer: (B) Cytology
Explanation: N/A

Q. 22
A man suddenly encounters a tiger in the jungle, and his heartbeat goes up, blood pressure increases and gets nervous. Which hormone is released more at this point in his body?

(A) Thyroxine
(B) Insulin
(C) Adrenaline
(D) Aldosterone

Answer: (C) Adrenaline
Explanation: N/A

Q. 23
Which of the following diseases is not caused by virus?

(A) Influenza
(B) Anthrax
(D) Dengue fever

Answer: (B) Anthrax
Explanation: Anthrax is caused by Bacteria

Q. 24
Which of the following is an egg-laying mammal?

(A) Platypus
(B) Bat
(C) Whale
(D) Seal

Answer: (A) Platypus
Explanation: N/A

Q. 25
Which of the following is the chief constituent of Biogas?

(A) Carbon dioxide
(B) Hydrogen
(C) Ethane
(D) Methane

Answer: (D) Methane
Explanation: N/A

Q. 26
Name the clinical procedure in which blood is transfused from recovered COVID-19 patients to a COVID-19 affected patient in critical condition.

(A) Dialysis therapy
(B) Plasma therapy
(C) Solidarity technique
(D) Hydroxychloroquine

Answer: (B) Plasma therapy
Explanation: N/A

Q. 27
Sun loving plants are called

(A) Halophytes
(B) Sciophytes
(C) Heliophytes
(D) Autotrophs

Answer: (C) Heliophytes
Explanation: N/A

Q. 28
Plants growing under shades are called

(A) Psammophytes
(B) Sciophytes
(C) Monocots
(D) Dicots

Answer: (B) Sciophytes
Explanation: N/A

Q. 29
Muscle fatigue is due to the accumulation of

(A) Cholesterol
(B) Lactic acid
(C) Lipoic acid
(D) Triglycerides

Answer: (B) Lactic acid
Explanation: N/A

Q. 30
The main thinking part of the brain is

(A) Mid brain
(B) Hypothalamus
(C) Forebrain
(D) Hindbrain

Answer: (C) Forebrain
Explanation: N/A

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