Looking for the Class12th Biology Objective Questions Paper 2023 PDF In this post, you’ll get the objective questions from the 2023 English paper, along with their correct answers in PDF format. It’s a quick and helpful resource for students who want to revise and practice using real exam questions.
Class 12th Biology Objective Questions Paper 2023 PDF Download Part 2
1. Herbicide-resistant gene in a plant is
(A) Bt
(B) Ct
(C) Mt
(D) Gst
Answer: GST
2. ‘Golden rice’ is a rice variety rich in
(A) Iron
(B) B-carotene
(C) Lysine
(D) Vitamin C
Answer: B-carotene
3. Control of gene expression takes place at the level of
(A) Transcription
(B) Translation
(C) DNA replication
(D) Both (A) and (B)
Answer: Transcription
4. Which form of RNA has a structure resembling a cloverleaf?
(A) MRNA
(B) rRNA
(C) hnRNA
(D) tRNA
Answer: tRNA
5. The nuclear transplantation technique was discovered by?
(A) Griffith
(B) Gurdon
(C) Briggs
(D) Ian Wilmut
Answer: Briggs
6. DNA and RNA are similar in
(A) Being capable of replicating
(B) Having similar sugars
(C) Being polymers of nucleotides
(D) Having similar pyrimidine bases
Answer: Being polymers of nucleotides
7. The first mammal appeared in which period of the era?
(A) Permian
(B) Triassic
(C) Tertiary
(D) None of these
Answer: Triassic
8. Satellite DNA is a useful tool of
(A) Sex determination
(B) Forensic science
(C) Tissue culture
(D) Organ culture
Answer: Forensic science
9. Variations appear during meiosis due to
(A) Crossing over
(B) Linkage
(C) Independent assortment
(D) Both (A) and (B)
Answer: Crossing over
10. Manas Sanctuary is located in
(A) Assam
(B) Bihar
(C) Gujarat
(D) Rajasthan
Answer: Assam
11. Which of the following is not a restriction enzyme?
(A) Eco RI
(B) Bam HI
(C) Hind III
(D) Pectinase
Answer: Pectinase
12. Genetically modified crops can be produced by
(A) Micropropagation
(B) Cross-breeding
(C) Recombinant DHA technology
(D) Somatic hybridization
Answer: Recombinant DHA technology
13. Onion is propagated through
(A) Leaves
(B) Rhizome
(C) Seeds
(D) Bulbs
Answer: Bulbs
14. A hemochorial placenta is found in which of the following?
(A) Cat
(B) Dog
(C) Humans
(D) Horse
Answer: Humans
15. Biogeochemical cycling means
(A) Cycling of water
(B) Cycling of energy in an ecosystem
(C) Cycling of nutrients in an ecosystem
(D) Cycling of gases between plants and the atmosphere
Answer: Cycling of nutrients in an ecosystem
16. Which of the following utilizes inorganic materials?
(A) Autotrophs
(B) Saprophytes
(C) Heterotrophs
(D) Decomposers
Answer: Decomposers
17. Lichen is a pioneer in the succession of
(A) Hydrosere
(B) Lithosphere
(C) Xerosere
(D) Both (B) and (C)
Answer: Xerosere
18. Which of the following is not a producer?
(A) Agaricus
(B) Nostoc
(C) Volvox
(D) Spirogyra
Answer: Volvox
19. In genetic engineering, antibiotics are used
(A) to select healthy vectors
(B) as selectable markers
(C) to keep the cultures free of infection
(D) Both (A) and (C)
Answer: as selectable markers
20. The DNA fragments separated on an agarose gel can be visualised after staining with
(A) Aniline blue
(C) Bromophenol blue
(B) Ethidium bromide
(D) Acetocarmine
Answer: Ethidium bromide
21. Isogametes are present in
(A) Frog
(B) Focus
(C) Bird
(D) Cladophora
Answer: Cladophora
22. The term ‘parthenogenesis’ was coined by
(A) Boveri
(B) Owen
(C) Sutton
(D) Johansson
Answer: Owen
23. Which type of binary fission occurs in Paramecium?
(A) Simple binary fission
(B) Transverse binary fission
(C) Longitudinal binary fission
(D) Oblique binary fission
Answer: Longitudinal binary fission
24. When a male differs from a female in morphology, it is called
(A) Homogamy
(B) Sexual dimorphism
(C) Heterogamy
(D) Hermaphroditism
Answer: Sexual dimorphism
25. Progesterone present in the contraceptive pills is meant for what?
(A) preventing cleavage
(B) preventing ovulation
(C) preventing fertilization
(D) both (A) and (C)
Answer: preventing ovulation
26. The method of directly injecting a sperm into an ovum is
(A) ET
(B) ICSI
(C) GIFT
(D) ZIFT
Answer: ICSI
27. Amniocentesis is a process to
(A) know about the disease of the brain
(B) determining any hereditary
(C) determine any disease in the heart
(D) both (A) and (C)
Answer: determining any hereditary
28. Genital warts are due to an STD spread by
(A) Hepatitis A
(B) Herpes virus
(C) Papilloma virus
(D) Trichomonas
Answer: Papillomavirus
29. T-lymphocyte originates in?
(A) Liver
(B) Thymus
(C) Bone-marrow
(D) Both (B) and (C)
Answer: Bone marrow
30. Crossing over is characteristic of which stage?
(A) Leptotene
(B) Zygotene
(C) Pachytene
(D) Diakinesis
Answer: Pachytene
Class12th Biology Objective Questions Paper 2023 PDF Download Part 2
Disclaimer: The questions and answers used in this post are taken from the book “Golden Publication.” We give credit to Golden Publication for this, and this blog has been created for educational purposes only.
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