CUET (UG) Biology Mock Question Paper 2026

Based on Latest NTA Syllabus | Total Questions: 42

For B.Sc Forensic Science NFSU Admission

1. Which structure develops into the endosperm after fertilisation in angiosperms?

A) Synergids

B) Secondary nucleus

C) Egg cell

D) Antipodals

2. Which hormone is mainly responsible for lactation after childbirth?

A) Estrogen

B) Progesterone

C) Prolactin

D) Oxytocin

3. Which disorder is caused due to trisomy of chromosome 21?

A) Turner syndrome

B) Klinefelter syndrome

C) Down’s syndrome

D) Thalassemia

4. Match List-I with List-II and choose the correct option.

List-I (Disease)

(A) Filariasis
(B) Amoebiasis
(C) Ringworm
(D) Malaria

List-II (Causative agent)

(I) Entamoeba histolytica
(II) Plasmodium
(III) Wuchereria bancrofti
(IV) Trichophyton

A) A–III, B–I, C–IV, D–II

B) A–II, B–I, C–III, D–IV

C) A–III, B–IV, C–I, D–II

D) A–I, B–II, C–III, D–IV

5. Arrange the following stages of human embryonic development in correct order:

(A) Morula
(B) Zygote
(C) Blastocyst
(D) Implantation

A) B → A → C → D

B) A → B → C → D

C) B → C → A → D

D) C → B → A → D

6. Which enzyme is responsible for joining Okazaki fragments during DNA replication?

A) DNA polymerase I

B) DNA ligase

C) Helicase

D) Gyrase

7. Which pyramid is always upright in an ecosystem?

A) Pyramid of biomass

B) Pyramid of energy

C) Pyramid of numbers

D) Pyramid of productivity

8. Which restriction enzyme cuts DNA at specific palindromic sequences?

A) DNA ligase

B) EcoRI

C) RNA polymerase

D) Primase

9. The Hardy–Weinberg principle explains:

A) Mutation rate

B) Genetic equilibrium in population

C) Natural selection

D) Speciation

10. Which structure prevents polyspermy in humans?

A) Zona pellucida

B) Corona radiata

C) Vitelline membrane

D) Chorion

11. ABO blood group inheritance is an example of:

A) Polygenic inheritance

B) Incomplete dominance

C) Codominance

D) Epistasis

12. Match List-I with List-II:

(A) Insulin
(B) Penicillin
(C) Cyclosporin A
(D) Citric acid

(I) Antibiotic
(II) Organic acid
(III) Immunosuppressant
(IV) Hormone

A) A–IV, B–I, C–III, D–II

B) A–I, B–IV, C–II, D–III

C) A–III, B–I, C–IV, D–II

D) A–IV, B–III, C–I, D–II

13. Which RNA carries amino acids during protein synthesis?

A) mRNA

B) rRNA

C) tRNA

D) snRNA

14. Which contraceptive method prevents implantation?

A) Condoms

B) Oral pills

C) Copper-T

D) Vasectomy

15. Arrange the steps of PCR in correct order:

(A) Denaturation
(B) Annealing
(C) Extension

A) A → B → C

B) B → A → C

C) C → B → A

D) B → C → A

16. Which disease is caused by Plasmodium?

A) Dengue

B) Malaria

C) Typhoid

D) Amoebiasis

17. Which experiment proved DNA as genetic material?

A) Miller’s experiment

B) Meselson–Stahl experiment

C) Hershey–Chase experiment

D) Griffith’s experiment

18. Which pyramid can be inverted?

A) Energy pyramid

B) Biomass pyramid

C) Energy flow

D) Trophic level

19. Bt cotton is resistant to:

A) Aphids

B) Bollworm

C) Whitefly

D) Mites

20. Which disorder is due to monosomy of X chromosome?

A) Down’s syndrome

B) Turner syndrome

C) Klinefelter syndrome

D) Thalassemia

21. Which microbe is used in curd formation?

A) Lactobacillus

B) Rhizobium

C) Saccharomyces

D) Aspergillus

22. Which enzyme is used in reverse transcription?

A) DNA ligase

B) Reverse transcriptase

C) RNA polymerase

D) Primase

23. Which interaction benefits both species?

A) Parasitism

B) Commensalism

C) Mutualism

D) Amensalism

24. Which vitamin is produced by gut bacteria?

A) Vitamin A

B) Vitamin B12

C) Vitamin C

D) Vitamin D

25. Which structure connects fetus to placenta?

A) Amnion

B) Chorion

C) Umbilical cord

D) Allantois

26. Which gas was absent in Miller’s experiment?

A) Methane

B) Ammonia

C) Oxygen

D) Hydrogen

27. Which technique separates DNA fragments by size?

A) PCR

B) Gel electrophoresis

C) ELISA

D) Blotting

28. Which population growth curve shows carrying capacity?

A) Exponential

B) Logistic

C) Linear

D) Declining

29. Which plant reproduces by apomixis?

A) Wheat

B) Citrus

C) Maize

D) Rice

30. Which operon is involved in lactose metabolism?

A) Trp operon

B) Lac operon

C) Ara operon

D) His operon

31. Which biosphere reserve is located in India?

A) Amazon

B) Nilgiri

C) Serengeti

D) Amazonia

32. Which drug is obtained from poppy plant?

A) Cocaine

B) Morphine

C) Heroin

D) Nicotine

33. Which enzyme cuts DNA at specific sites?

A) Ligase

B) Restriction endonuclease

C) Polymerase

D) Topoisomerase

34. Which structure of ovule is opposite to micropyle?

A) Chalaza

B) Hilum

C) Funiculus

D) Nucellus

35. Which immune cells produce antibodies?

A) T-cells

B) Plasma cells

C) Macrophages

D) NK cells

36. Which organism is used as biocontrol agent?

A) Rhizobium

B) Trichoderma

C) Lactobacillus

D) Nostoc

37. Which tissue stores reserve food in plants?

A) Collenchyma

B) Parenchyma

C) Xylem

D) Phloem

38. Which gas causes global warming?

A) Oxygen

B) Nitrogen

C) Carbon dioxide

D) Hydrogen

39. Which vector transmits filariasis?

A) Anopheles

B) Aedes

C) Culex

D) Tsetse fly

40. Which stage of meiosis shows crossing over?

A) Leptotene

B) Zygotene

C) Pachytene

D) Diplotene

41. Which biodiversity hotspot is in India?

A) Amazon

B) Western Ghats

C) Alps

D) Andes

42. Which organelle is called the powerhouse of the cell?

A) Ribosome

B) Mitochondria

C) Golgi body

D) Lysosome

Test Results

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