Bihar Board Class 12 Biology Question Paper PDF with Solutions is available for download. The Bihar School Examination Board (BSEB) conducted the Class 12 examination for a total duration of 3 hours 15 minutes, and the question paper was of a total of 100 marks.

Bihar Board Class 12 Biology 2025 Question Paper with Solutions Set F

Bihar Board Class 12 Biology 2025 Question Paper Set F Download PDF Check Solutions

Bihar Board Class 12 Biology 2025 Question Paper with Solutions Set F
Question 1:

By which of the following is sugarcane sown?

  • (A) Tubers
  • (B) Cutting of stems
  • (C) Bulbs
  • (D) Seeds

Question 2:

Which of the following is affected by SO\(_2\) pollution?

  • (A) Nucleus
  • (B) Mitochondria
  • (C) Chloroplast
  • (D) Golgi bodies

Question 3:

Which of the following is the period between birth and death?

  • (A) Life cycle
  • (B) Life span
  • (C) Birth rate
  • (D) Propagation

Question 4:

Sertoli cells are controlled by which of the following hormones?

  • (A) LH
  • (B) FSH
  • (C) Prolactin
  • (D) GH

Question 5:

Which of the following cannot pass through placenta?

  • (A) Alcohol
  • (B) Fatty acids
  • (C) Iron
  • (D) Maternal antibodies

Question 6:

Which of the following is an important factor in the formation of new species?

  • (A) Isolation
  • (B) Mutation
  • (C) Variation
  • (D) Competition

Question 7:

The opening of which of the following is known as blastopore?

  • (A) Gastrula
  • (B) Morula
  • (C) Blastula
  • (D) Neural

Question 8:

Which of the following is a correct pair?

  • (A) G = T
  • (B) C = G
  • (C) G = C
  • (D) A = T

Question 9:

Which of the following is a soluble RNA?

  • (A) m-RNA
  • (B) r-RNA
  • (C) c-RNA
  • (D) t-RNA

Question 10:

By which of the following bonds are the nucleotides of DNA attached?

  • (A) Hydrogen
  • (B) Covalent
  • (C) Electrovalent
  • (D) All of these

Question 11:

Which of the following is an example of analogous organs?

  • (A) Wings of birds and butterfly
  • (B) Tail of dog and cat
  • (C) Wing of bat and hand of man
  • (D) All of these

Question 12:

By which of the following is water hyacinth pollinated?

  • (A) Water
  • (B) Insect
  • (C) Wind
  • (D) Both (B) and (C)

Question 13:

In which of the following are male and female flowers found on the same plant?

  • (A) Cucumber
  • (B) Coconut
  • (C) Brinjal
  • (D) Tomato

Question 14:

On which of the following planets is there a possibility of life?

  • (A) Mars
  • (B) Mercury
  • (C) Venus
  • (D) Jupiter

Question 15:

Which of the following is related to pomiculture?

  • (A) Silk
  • (B) Fruit
  • (C) Vegetable
  • (D) Flower

Question 16:

Which of the following is a biotic component of the ecosystem?

  • (A) Air
  • (B) Sunlight
  • (C) Water
  • (D) Producer

Question 17:

Which of the following is a marine fish?

  • (A) Catla
  • (B) Mangur
  • (C) Hilsa
  • (D) Singhi

Question 18:

Which of the following is a source of quinine?

  • (A) Canabis
  • (B) Cinchona
  • (C) Poppy
  • (D) Eucalyptus

Question 19:

Where are woody lianas / climbers found?

  • (A) Taiga
  • (B) Deciduous forest
  • (C) Tropical rain forest
  • (D) Shrub (chaparral)

Question 20:

Which of the following is used to induce mutation in crop plants?

  • (A) Gamma rays
  • (B) Alpha rays
  • (C) X-rays
  • (D) Sunrays

Question 21:

In which of the following does vegetative propagation take place through tuber?

  • (A) Garlic
  • (B) Amorphophallus
  • (C) Potato
  • (D) Mango

Question 22:

Which of the following terms is used for the population found in a particular area?

  • (A) Natural
  • (B) Endemic
  • (C) Alien
  • (D) Pandemic

Question 23:

What is the phenotypic ratio of F2 generation in case of codominance?

  • (A) 3 : 1
  • (B) 1 : 3
  • (C) 1 : 2 : 1
  • (D) 1 : 1

Question 24:

Which of the following is related to the formation of RNA by DNA?

  • (A) Translation
  • (B) Transcription
  • (C) Replication
  • (D) Transduction

Question 25:

Which of the following is a pathogen of malaria?

  • (A) Plasmodium
  • (B) Wuchereria
  • (C) Sacromyces
  • (D) Puccinia

Question 26:

Which of the following absorbs the maximum amount of solar energy?

  • (A) Plantation
  • (B) Cropping
  • (C) Growing grass
  • (D) Culturing algae

Question 27:

Which of the following elements is present in the centre of the porphyrin ring of chlorophyll?

  • (A) Iron
  • (B) Manganese
  • (C) Copper
  • (D) Magnesium

Question 28:

In which of the following plants is there phosphoenol pyruvate receptor of CO2?

  • (A) C-3
  • (B) C-4
  • (C) C-6
  • (D) All of these

Question 29:

What is the tendency of endosperm in gymnosperms?

  • (A) Haploid
  • (B) Diploid
  • (C) Triploid
  • (D) None of these

Question 30:

Which of the following is a stress hormone?

  • (A) Ethylene
  • (B) G.A.3
  • (C) I.A.A.
  • (D) Abscisic acid

Question 31:

Which of the following is most harmful to the ozone layer?

  • (A) SO\(_2\)
  • (B) CO\(_2\)
  • (C) Freon
  • (D) All of these

Question 32:

Which of the following is related to Kaziranga National Park?

  • (A) Lion
  • (B) Tiger
  • (C) Panther
  • (D) Rhinoceros

Question 33:

What is the number of bio-reserves in India?

  • (A) 10
  • (B) 18
  • (C) 23
  • (D) 41

Question 34:

Which of the following fixes nitrogen?

  • (A) Anabaena
  • (B) Ulva
  • (C) Ulotrix
  • (D) Spirogyra

Question 35:

What does Cry-toxin do?

  • (A) Swelling of cells
  • (B) Binding of epithelium of midgut
  • (C) Lysis of intestinal cells
  • (D) More than one of these

Question 36:

In which of the following is an extra pair of chromosomes found?

  • (A) Trisomic
  • (B) Double trisomic
  • (C) Tetrasomic
  • (D) Nullisomic

Question 37:

By which of the following methods do cancer cells divide?

  • (A) Mitosis
  • (B) Amitosis
  • (C) Meiosis
  • (D) None of these

Question 38:

Which of the following is an initial codon?

  • (A) UGA
  • (B) GUA
  • (C) AUG
  • (D) All of these

Question 39:

Who coined the word 'biology'?

  • (A) Aristotle
  • (B) Gregor Mendel
  • (C) Charles Darwin
  • (D) Boveri

Question 40:

Which of the following is related to the 'Yellow Revolution'?

  • (A) Milk
  • (B) Egg
  • (C) Fish
  • (D) Oilseeds

Question 41:

From which part of the plant is clove obtained?

  • (A) Flower
  • (B) Bud
  • (C) Fruit
  • (D) Seed

Question 42:

Which of the following is used to reduce the amount of cholesterol in the blood?

  • (A) Statin
  • (B) Cyclosporin
  • (C) Lipase
  • (D) Streptokinase

Question 43:

Which of the following is a part of the perianth?

  • (A) Petal
  • (B) Tepal
  • (C) Thalamus
  • (D) Stamen

Question 44:

Which of the following human cells is motile?

  • (A) Nerve cell
  • (B) Cutaneous cell
  • (C) Egg cell
  • (D) Sperm cell

Question 45:

Which of the following is a sex-linked character?

  • (A) Anaemia
  • (B) Colourblindness
  • (C) Baldness
  • (D) All of these

Question 46:

Which of the following is a living fossil?

  • (A) Amphioxus
  • (B) Varanus
  • (C) Lamprey
  • (D) Latimeria

Question 47:

Which of the following gases was not present in the early period of the Earth?

  • (A) O2
  • (B) CO2
  • (C) H2
  • (D) N2

Question 48:

Convergent evolution is demonstrated by which of the following?

  • (A) Bacteria and protozoa
  • (B) Rat and dog
  • (C) Starfish and cuttle fish
  • (D) Dogfish and whale

Question 49:

Which of the following is an example of atavism?

  • (A) Curly hair
  • (B) Long hand
  • (C) A baby born with a small tail
  • (D) All of these

Question 50:

Where are mangrove vegetation found?

  • (A) Western Ghat
  • (B) Sundarban
  • (C) Dehradun Valley
  • (D) Kullu

Question 51:

In which of the following does secondary succession take place ?

  • (A) On sand
  • (B) In degraded forests
  • (C) On bare rocks
  • (D) Newly formed ponds

Question 52:

Which of the following is an excellent biofertilizer ?

  • (A) Azolla
  • (B) Marsilea
  • (C) Pteridium
  • (D) Salvina

Question 53:

Which of the following is a significant trend in human evolution ?

  • (A) Upright posture
  • (B) Binocular vision
  • (C) Increasing cranial capacity
  • (D) All of these

Question 54:

Which of the following types of reproduction takes place in Amoeba under favourable condition?

  • (A) Fragmentation
  • (B) Multiple fission
  • (C) Budding
  • (D) Binary fission

Question 55:

Where does capacitation of human sperms occur?

  • (A) Testis
  • (B) Vagina
  • (C) Vas deferens
  • (D) Female genital tract

Question 56:

Which of the following can lead to the development of brothers?

  • (A) One zygote
  • (B) Two zygotes
  • (C) Without zygote
  • (D) Gamete

Question 57:

From which of the following do developing sperms get nutrition?

  • (A) Sertoli cells
  • (B) Germinal epithelium
  • (C) Blood cell
  • (D) Leydig cells

Question 58:

Who among the following propounded the terms muton, cistron, and recon?

  • (A) J. Lederberg
  • (B) W. Ingram
  • (C) Bateson
  • (D) S. Benzer

Question 59:

Which of the following can live at more than one place in a trophic level of an ecosystem?

  • (A) Phytoplankton
  • (B) Zooplankton
  • (C) Fish
  • (D) All of these

Question 60:

What is the nature of mesocarp in coconut?

  • (A) Hard
  • (B) Fibrous
  • (C) Fleshy
  • (D) None of these

Question 61:

Which of the following is responsible for the formation of androecium?

  • (A) Stamen
  • (B) Pollen
  • (C) Pollen sac
  • (D) Style

Question 62:

What is the number of linkage groups in human beings?

  • (A) 46
  • (B) 22
  • (C) 92
  • (D) 23

Question 63:

Which of the following represents the basic number of chromosomes?

  • (A) n
  • (B) 2n
  • (C) 4n
  • (D) n/2

Question 64:

Which of the following does coding of \(\beta\)-galactosidase in lac operon?

  • (A) z-gene
  • (B) a-gene
  • (C) y-gene
  • (D) i-gene

Question 65:

Which of the following is a sexually transmitted disease (STD)?

  • (A) Syphilis
  • (B) Gonorrhoea
  • (C) Both ((A) and ((B)
  • (D) None of these

Question 66:

At which of the following stages is the embryo transferred to the fallopian tube?

  • (A) 8-celled embryo
  • (B) 32-celled embryo
  • (C) Zygote
  • (D) Zygote or 8-celled embryo

Question 67:

Which of the following refers to the scientific study of human population?

  • (A) Geography
  • (B) Geology
  • (C) Biology
  • (D) Demography

Question 68:

By which of the following means is the colour of skin determined in human beings?

  • (A) Quantitative
  • (B) Multiple gene
  • (C) Qualitative
  • (D) All of these

Question 69:

How are 8 ascospores formed in Neurospora?

  • (A) 3 Mitosis
  • (B) 1 Mitosis, 1 Meiosis
  • (C) 2 Mitosis
  • (D) 1 Meiosis, 1 Mitosis

Question 70:

What is a man with female characteristics called?

  • (A) Polymorph
  • (B) Jollymorph
  • (C) Gynomorph
  • (D) Gynandromorph

Question 71:

What is morula?


Question 72:

Mention any two benefits of self-pollination.


Question 73:

What do you mean by camouflage?


Question 74:

What is the importance of microorganisms in research?


Question 75:

Mention any two advantages of genetically modified animals.


Question 76:

What is Klinefelter syndrome?


Question 77:

Write the names of any four species along with their scientific names.


Question 78:

Write two differences between ontogeny and phylogeny.


Question 79:

Write any two symptoms of sickle cell anaemia.


Question 80:

What are sacred groves?


Question 81:

Define commensalism and write two examples.


Question 82:

What are pathogens? Write the names of any one plant and one animal pathogen.


Question 83:

Define germplasm.


Question 84:

What is gene library?


Question 85:

Mention any two harmful effects of sewage.


Question 86:

What is mycorrhiza?


Question 87:

What is the importance of Red Data Book?


Question 88:

Write any two differences between integument and testa.


Question 89:

Explain any two differences between c-DNA and s-DNA.


Question 90:

What is epistasis?


Question 91:

What do you understand by ground water? Describe the causes for its depletion and remedies.


Question 92:

Explain the differences between any two of the following:


(a) Food chain and food web


Question 93:

Present a neat, clean, and well-labelled diagram of an embryo inside the human uterus.


Question 94:

Describe the process of sex-determination in honeybees.


Question 95:

Present a well-labelled neat and clean diagram of recombinant technology.


Question 96:

Describe biofortification in brief.