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NEET Bio MCQ. We covered all the NEET Bio MCQ in this post for free so that you can practice well for the exam.
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MCQ on Living World for NEET Students
What components make up the lac operon?
(A) four regulatory genes only
(B) one regulatory gene and three structural genes
(C) two regulatory genes and two structural genes
(D) three regulatory genes and three structural genes
Option b – one regulatory gene and three structural genes
In a plant breeding program, what term refers to the complete collection of all genetically diverse plant varieties and seeds?
(A) selection of superior recombinants
(B) cross-hybridization among selected parents
(C) evaluation and selection of parents
(D) germplasm collection
Option d – germplasm collection
Which of the following statements is accurate?
(A) Biogas forms through the aerobic breakdown of animal waste
(B) Methanobacterium is an oxygen-requiring microbe found in the rumen of cattle
(C) Biogas, often referred to as gobar gas, consists entirely of methane
(D) Activated sludge in sewage treatment tanks is rich in aerobic bacteria
Option d – Activated sludge in sewage treatment tanks is rich in aerobic bacteria
Which statement regarding sewage treatment is incorrect?
(A) Physical methods are used in primary treatment
(B) Secondary treatment involves biological activity
(C) BOD levels increase after secondary treatment
(D) Anaerobic sludge digesters are used during tertiary treatment
Option c – BOD levels increase after secondary treatment
According to which system are animals scientifically named?
(A) Indian Code for Zoology Nomenclature
(B) International Class for Zoology Nomenclature
(C) International Classification for Zoological Nomenclature
(D) International Code for Zoological Nomenclature
Option d – International Code for Zoological Nomenclature
The botanical term ‘polyadelphous’ is associated with which floral whorl?
(A) calyx
(B) gynoecium
(C) androecium
(D) corolla
Option c – androecium
During which stage of meiosis does the synaptonemal complex break down?
(A) zygotene
(B) diplotene
(C) leptotene
(D) pachytene
Option b – diplotene
The Red List, which categorizes species based on their conservation status, is published by
(A) ICFRE
(B) IUCN
(C) UNEP
(D) WWF
Option b – IUCN
How many meiotic divisions are needed to generate 200 or 400 pea seeds?
(A) 200 / 400
(B) 400 / 800
(C) 300 / 600
(D) 250 / 500
Option d – 250 / 500
Which of the following is not a characteristic of cancer cells, while the others are?
(A) Compete with normal cells for nutrients
(B) Migrate beyond their original location
(C) Multiply uncontrollably
(D) Exhibit contact inhibition
Option d – Exhibit contact inhibition
Which gases are typically produced in anaerobic sludge digesters?
(A) Methane and carbon dioxide
(B) Methane, hydrogen sulfide, and carbon dioxide
(C) Methane, hydrogen sulfide, and oxygen
(D) Hydrogen sulfide and carbon dioxide
Option b – Methane, hydrogen sulfide, and carbon dioxide
Which of the following is not considered a major health hazard linked to increased UV radiation from ozone depletion?
(A) Higher incidence of skin cancer
(B) Weakening of the immune system
(C) Eye damage
(D) Elevated risk of liver cancer
Option d – Elevated risk of liver cancer
Which of these substrates does not promote the cultivation of Spirulina?
(A) sewage
(B) animal dung
(C) straw
(D) soil
Option d – soil
Amensalism is an ecological interaction where
(A) one species benefits while the other is harmed
(B) one is harmed while the other remains unaffected
(C) one benefits and the other experiences no impact
(D) both organisms are harmed
Option b – one is harmed while the other remains unaffected
In dioecious flowering species, which two types of pollination are naturally prevented?
(A) autogamy and xenogamy
(B) autogamy and geitonogamy
(C) geitonogamy and xenogamy
(D) cleistogamy and xenogamy
Option b – autogamy and geitonogamy
In which plant is seed formation guaranteed even without pollinators?
(A) Commelina
(B) Zostera
(C) Salvia
(D) Ficus
Option a – Commelina
During DNA fingerprinting, what type of molecule is formed as a radioactive product during hybridization?
(A) double-stranded DNA
(B) single-stranded DNA
(C) single-stranded mRNA
(D) double-stranded rRNA
Option a – double-stranded DNA
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