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.31 Which of the following is the best definition of ecological efficiency?
A The amount of energy utilised at different trophic levels in a food chain
B The amount of energy stored at different trophic levels in a food chain
C The ratio between the mass and the energy flow at different trophic levels in a food chain
D The ratio between energy flows at different points in a food chain
Discuss / Board
Q.32 In the context of cell division, which chromosomal behaviour takes place at the leptotene stage?
A Chromosomes become visible and start to condense
B Crossing over occurs
C Homologous chromosomes pair up
D Chromosomes align at the equator
Discuss / Board
Q.33 Which of the following categories does Gonyaulax belong to?
A Euglenoids
B Chrysophytes
C Protozoans
D Dinoflagellates
Discuss / Board
Q.34 Which of the following is NOT a member of the Aves (birds) class?
A Psittacula
B Neophron
C Pteropus
D Struthio
Discuss / Board
Q.35 In the year 1925, who extracted lipids from an erythrocyte sample and found that lipid monolayers are good for measuring molecular surface area versus lateral pressure?
A Gorter and Grendel
B Carson and Eccles
C Avery and Buck
D Margulis and Ruska
Discuss / Board
Q.36 Match the points under Column A with those under Column B. Column A (Subphylum) Column B (Animal) i. Hexapoda a. Daphnia ii. Crustacea b. Mosquito iii. Myriapoda c. Limulus iv. Chelicerata d. Julus
A i-b, ii-c, iii-a, iv-d
B i-a, ii-b, iii-c, iv-d
C i-d, ii-c, iii-b, iv-a
D i-b, ii-a, iii-d, iv-c
Discuss / Board
Q.37 Which types of gametes are found in Spirogyra?
A Isogamous and flagellated
B Heterogamous and non-flagellated
C Heterogamous and flagellated
D Isogamous and non-flagellated
Discuss / Board
Q.38 What kind of phyllotaxy was examined in the Guava plant?
A Superimposed
B Whorled
C Alternate
D Opposite
Discuss / Board
Q.39 The growth form of a plant, comprising its size, shape and orientation is known as:
A habit
B environment
C habitat
D growth pattern
Discuss / Board
Q.40 What is the main sense organ that virtual reality displays are aiming for?
A Smell
B Taste
C Vision
D Touch
Discuss / Board
Q.41 Which of the following is a food-borne disease caused by the consumption of contaminated food or beverages?
A Malaria
B Tuberculosis
C Chicken pox
D Cholera
Discuss / Board
Q.42 How do the muscle cells help in movement?
A The lining of the vessels inside help in movement.
B The contraction and relaxation of these cells result in movement.
C The blood flow of the cells helps in movement.
D The thickness of the cell layer helps in movement.
Discuss / Board
Q.43 Which group of animals has a segmented spinal column together with a few primitive forms in which the backbone is represented by a notochord?
A Arthropoda
B Echinodermata
C Mollusca
D Vertebrata
Discuss / Board
Q.44 Who developed the technique of preserving the quality of food by raising its temperature to prevent microbial growth in the food?
A Robert Koch
B Antonie van Leeuwenhoek
C Louis Pasteur
D Joseph Lister
Discuss / Board
Q.45 Which of the following is NOT a mutation based disease?
A Sickle cell anaemia
B Malaria
C Phenylketonuria
D Down syndrome
Discuss / Board
Q.46 Identify the INCORRECT statement regarding invertebrates from the options given below.
A They have open circulatory system as there is no organisation in the distribution.
B They have radial or bilateral body symmetry.
C They have a pair of solid nerve cords, situated ventrally and bearing segmentally arranged ganglia.
D They possess a backbone and an internal skeleton.
Discuss / Board
Q.47 The cell wall of bacteria is made up of:
A peptidoglycan
B cellulose
C glycogen
D peptone
Discuss / Board
Q.48 Which of the following sequences is correct, according to taxonomy?
A Order, Phylum, Family, Genus
B Kingdom, Phylum, Class, Order
C Class, Family, Order, Species
D Kingdom, Order, Genus, Phylum
Discuss / Board
Q.49 What do you mean by semiconservative DNA replication?
A After the completion of replication, each DNA molecule would have two parental and two newly synthesised strand.
B RNA is dependent on DNA for the synthesis of proteins
C DNA is dependent on RNA for the synthesis of proteins
D After the completion of replication, each DNA molecule would have one parental and one newly synthesised strand.
Discuss / Board
Q.50 Which of the following statements about eutrophication is correct?
A It happens when too much carbon enriches the water, causing excessive growth of bacteria and reduced growth of plants.
B It happens when too less nitrogen is present in the water, causing reduced growth of plants and algae.
C It is a beneficial process for environment restoration.
D It happens when too much nitrogen enriches the water, causing excessive growth of plants and algae.
Discuss / Board
Q.51 In which year did Wilhelm Johannsen coin the term 'gene' to describe the Mendelian units of heredity?
A 1909
B 1900
C 1920
D 1910
Discuss / Board
Q.52 Which of the following is a rare group of genetic disorders caused by mutations of certain genes affecting the colour (pigmentation) of the skin, hair and eyes?
A Alkaptonuria
B Alagille syndrome
C Albinism
D Angelman syndrome
Discuss / Board
Q.53 In which of the following plants do roots arise from parts of a plant other than the radicle?
A Monstera
B Turnip
C Mustard plant
D Maize
Discuss / Board
Q.54 Which of the following animals can change their gender during their life span?
A Dog
B Clownfish
C Elephant
D Eagle
Discuss / Board
Q.55 Which of the following muscles regulates the exit of food from the stomach into the small intestine?
A Cardiac sphincter
B Diaphragm
C Pyloric sphincter
D Ileocecal valve
Discuss / Board
Q.56 In honey bees,
A males are triploid and females are tetraploid.
B males are haploid and females are diploid.
C males are diploid and females are haploid.
D males are tetraploid and females are triploid.
Discuss / Board
Q.57 In a dihybrid cross between two heterozygous fruit flies with brown bodies and red eyes (BbEe × BbEe ), what will be the probability of getting BBEE genotype?
A 1/16
B 1/4
C 1/8
D 1/2
Discuss / Board
Q.58 Which of the following enzymes are essential of DNA replication in an animal cell?
A Reverse transcriptase, DNA polymerase, DNA primase
B Topoisomerase, DNA ligase, DNA polymerase, DNA primase
C Reverse transcriptase, RNA polymerase, Ligase
D Reverse transcriptase, DNA polymerase, Ligase
Discuss / Board
Q.59 Which of the following is a medium-sized globular protein that acts as a pancreatic serine protease found in the digestive system of many vertebrates?
A Amylase
B Lipase
C Trypsin
D Pepsin
Discuss / Board
Q.60 In a symport:
A a molecule moves across a membrane independent of other molecules
B both molecules cross the membrane in the same direction
C both molecules cross the membrane in the opposite direction
D a molecule moves across a membrane dependent of other molecules
Discuss / Board

Master Biology set 1 for All Competitive Exams 2026

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