Biology set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 605 questions
Q.91 In the case of reptiles, their heart is not properly divided in to four chambers i.e., it consists of two auricles and an incompletely divided ventricle. Which of the following is an example of a reptile having a four chambered heart?
A Lizard
B Snake
C Crocodile
D Turtles
Discuss / Board
Q.92 All living organisms on the Earth are made up of carbon compounds. Many years ago, dead and buried plants started slowly modifying into coal under high temperature and high pressure. This process is called:
A carbonization
B composting
C black gold formation
D peat formation
Discuss / Board
Q.93 Which of the following communicable diseases is caused by bacteria?
A Tuberculosis
B Malaria
C COVID-19
D Ringworm
Discuss / Board
Q.94 The transportation mechanism in cells by which food or other useful molecules from the outside are carried inside the cell is known as .
A Endocytosis
B Osmosis
C Fusion
D Exocytosis
Discuss / Board
Q.95 Which of the following options correctly matches column-A and column-B? Column-A (Food component) Column-B (Enzyme involved in digestion) i. Protein a. Amylase ii. Carbohydrates b. Lipase iii. Fats c. Trypsin
A i-a, ii-b, iii-c
B i-a, ii-c, iii-b
C i-b, ii-a, iii-c
D i-c, ii-a, iii-b
Discuss / Board
Q.96 What solution should be used to test for the presence of starch in food?
A Talc solution
B Ethylene glycol - water solution
C Iodine solution
D Magnesium solution
Discuss / Board
Q.97 The Krebs cycle of aerobic respiration is carried out within which of the following cell organelles?
A Lysosome
B Nucleus
C Mitochondria
D Spirogyra
Discuss / Board
Q.98 The microscopic channels, which traverse the cell walls of plant cells and some algal cells, transport and enabling communication between them is called:
A ribosomes
B plasmodesmata
C lysosomes
D desmosomes
Discuss / Board
Q.99 Which specific chemical can be applied to achieve staining of chromosomes?
A Acetocarmine
B Methanol
C Hydrochloric acid
D Ethanol
Discuss / Board
Q.100 Which of the following are functions of the cell membrane? A) Selective permeability B) Cell signaling C) Protein synthesis D) Cell protection
A Only A, B and D
B Only A, B and C
C Only C and D
D Only A and C
Discuss / Board
Q.101 When protein-rich gelatinous egg white is heated, it turns to solid white due to:
A Fermentation
B Protein Denaturation
C Gluten Formation
D Emulsification
Discuss / Board
Q.102 Match the columns. Column A (Plant Group) i. Bryophyta ii. Pteridophyta iii. Gymnosperms iv. Angiosperms Column B (Example)
A i-d, ii-c, iii-b, iv-a
B i-c, ii-d, iii-b, iv-a
C i-c, ii-a, iii-b, iv-d
D i-c, ii-d, iii-a, iv-b
Discuss / Board
Q.103 Several biological processes are catalysed by enzymes. Digestive enzymes are present in which part of the cell?
A Ribosomes
B Lysosomes
C Mitochondria
D Nucleus
Discuss / Board
Q.104 Eutrophication is a condition where excessive growth of algal bloom occurs on the surface of a water body because of abundant nutrients. Which of the following are the key nutrients for eutrophication?
A Phosphorus and iron
B Iron and nitrogen
C Nitrogen and potassium
D Phosphorus and nitrogen
Discuss / Board
Q.105 Which of the following phyla contains Leech?
A Coelenterata
B Platyhelminthes
C Nematoda
D Annelida
Discuss / Board
Q.106 Which of the following diseases is detected by the Widal test?
A Malaria
B Cholera
C Tuberculosis
D Typhoid fever
Discuss / Board
Q.107 Which of the following are primary functions related to the notochord in chordate embryos? A) Provides skeletal support B) Serves as a source of midline signals C) Aids in muscle attachment D) Digests food
A Only A, B and C
B Only B, C and D
C Only A and C
D Only C and D
Discuss / Board
Q.108 It is observed that a child's heart rate is 135 times per minute. The beat frequency of heart is .
A 8100 Hz
B 1.12 Hz
C 135 Hz
D 2.25 Hz
Discuss / Board
Q.109 Which of the following characteristics was used by Aristotle to classify animals?
A Specialised organs
B Types of body cells
C Habitat
D Photosynthesis
Discuss / Board
Q.110 In a food chain of Algae-Shrimp-Fish-Bird, if the energy available at the bird is 4 kJ , then the energy available at the shrimp is:
A 400 kJ
B 40 kJ
C 4000 kJ
D 0.4 kJ
Discuss / Board
Q.111 Which of the following can be a basis of difference between a salamander and a house-wall lizard apart from their habitat?
A Scales on the skin
B Egg-laying feature
C Cold-blood
D Three-chambered heart
Discuss / Board
Q.112 Which of the following groups of organisms are more vulnerable to the acidification of ocean?
A Marine algae
B Marine mammals
C Calcifying organisms
D Marine reptiles
Discuss / Board
Q.113 What cellular structure is responsible for breaking down and recycling cellular components and molecules?
A Lysosomes
B Golgi apparatus
C mitochondria
D plastids themselves
Discuss / Board
Q.114 What do you call the body cavity that is lined by mesoderm?
A Triploblasts
B Diploblasts
C Coelom
D Radial symmetry
Discuss / Board
Q.115 Anorexia nervosa is an eating disorder in teenagers. Here body weight:
A Drops dangerously low
B Increases rapidly
C Remains unaffected
D Fluctuates daily
Discuss / Board
Q.116 The process by which a water body gradually becomes enriched with nutrients and minerals, mainly phosphorus and nitrogen, leading to enormous growth of algae on the surface of the water, thus decreasing the amount of dissolved oxygen in the water is known as:
A Eutrophication
B Hypoxia
C Bioaccumulation
D Biomagnification
Discuss / Board
Q.117 Which virus is responsible for causing common cold?
A Influenza virus
B Rhinovirus
C Rotavirus
D HIV
Discuss / Board
Q.118 What is the primary role of autotrophic organisms in an ecosystem?
A Breaking down dead organisms
B Preying on other organisms for food
C Producing organic matter from inorganic substances
D Converting organic matter into energy
Discuss / Board
Q.119 Which of the following statements is NOT true about Plastids?
A They have their own ribosomes.
B Starch, oils and protein granules are stored in chromoplasts.
C Stroma is found in chloroplast.
D They have their own DNA.
Discuss / Board
Q.120 Which of the following is considered unicellular green algae?
A Cladophora
B Chlamydomonas
C Chlorophyta
D Oedogonium
Discuss / Board

Master Biology set 1 for All Competitive Exams 2026

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