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
(A) AIDS
(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
(C) AIDS
(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
