Category: IIT JAM Biotechnology Previous Year Question paper Topic Plant biology

Category: IIT JAM Biotechnology Previous Year Question paper Topic Plant biology

IIT JAM Biotechnology Previous Year Question paper Topic Plant biology

25. Which of the following is(are) auxins?  (A) 1-Naphthaleneacetic acid (NAA) (B) Indole-3-butyric acid (IBA) (C) 2,4-Dichlorophenoxyacetic acid (2,4-D) (D) Indole-3-acetic acid (IAA)

Auxins in Plants Explained

24.Which one of the following statements regarding plant Photosystems is NOT true?                   (A) Photosystem I is present in unstacked thylakoid membrane (B) Photosystem II is present in stacked thylakoid membrane (C)Photosystem I absorbs light of 700 nm wavelength (D) Photosystem I is responsible for water splitting

Plant Photosystems Explained

23. Which one of the following is NOT an auxin? (A) Indole-3-acetic acid                            (B) Abscisic acid (C) Phenylacetic acid (D) Indole-3-butyric acid

Which Compound is NOT an Auxin?

22. C3 plants utilize 18 molecules of ATP to synthesize one molecule of glucose from CO2. How many molecules of ATP equivalents are used by C4 plants to synthesize one molecule of glucose from CO2?                   

ATP Requirement in C4 Photosynthesis

21. Indole acetic acid (IAA) is involved in _____.      (A) gravitropism           (B) flowering    (C) ripening      (D) senescence

Indole Acetic Acid (IAA) Function

20. Which of the following statement(s) is/are CORRECT in the classical 'ABC model' for genetic control of flower development?      (A) 'Class A' genes solely determine sepal identity  (B) 'Class B' genes solely determine petal identity  (C) 'Class C' genes solely determine stamen identity  (D) 'Class C' genes solely determine carpel identity

ABC Model of Flower Development

19. Which one of the following statements is CORRECT about Agrobacterium tumefaciens mediated plant transformation?     (A) The marker gene for the selection of plant transformant is located outside the T-DNA segment of the transformation plasmid  (B) The marker gene for the selection of bacterial transformant is located within the T-DNA segment of the transformation plasmid  (C) Two T-DNA border sequences (left and right) are essential to design a binary vector system  (D) In binary vector system, the vir genes and two T-DNA border sequences (left and right) are present in the same transformation plasmid

Agrobacterium tumefaciens Mediated Plant Transformation

18. Which of the following is the CORRECT combination of a synthetic auxin and a synthetic cytokinin?    (A) 2,4-Dichlorophenoxy acetic acid (2,4-D) and Indole-3-acetic acid (IAA)  (B) 2,4-Dichlorophenoxy acetic acid (2,4-D) and 6-Benzylamino purine (BAP)  (C) 6-Benzylamino purine (BAP) and Zeatin  (D) Indole-3-acetic acid (IAA) and Zeatin

Synthetic Auxin and Synthetic Cytokinin Explained

17. What is the ploidy level of a sporophyte in angiosperms?     (A) n  (B) 2n  (C) 3n  (D) 4n

What is the Ploidy Level of Sporophyte in Angiosperms?

16. Which of the following is/are trace element(s)? (A) Mn (B) P (C) S (D) Zn

Which are Trace Elements in Plants?

15. Which of the following statement(s) about Golden Rice is/are correct?  (A) Consumption of it increases vitamin A levels (B) Consumption of it increases vitamin D levels (C) Consumption of it increases vitamin K levels (D) It is a transgenic crop containing β-carotene

Vitamin A, β-Carotene and Transgenic Crop

14. Which of the following is/are lateral meristems? (A) Cork cambium (B) Procambium (C) Protoderm (D) Vascular cambium

Which are Lateral Meristems in Plants?

13. Match the terminology in Group I with the stimulus in Group II that generates growth response of plants  Group I Group II P. Gravitropism 1. Light Q. Phototropism 2. Touch R. Thigmotropism 3. Chemical S. Chemotropism 4. Gravity (A) P–3, Q–4, R–2, S–1 (B) P–2, Q–1, R–3, S–4 (C) P–4, Q–1, R–2, S–3 (D) P–4, Q–2, R–1, S–3

Match Plant Tropisms with Their Stimuli

12. Which one of the following hormones promotes fruit ripening?  (A) Abscisic acid (B) Auxin (C) Ethylene (D) Gibberellin

Which Hormone Promotes Fruit Ripening?

11. Which one of the following is a simple tissue system in plants?  (A) Epidermis (B) Parenchyma (C) Phloem (D) Xylem

Which is a Simple Tissue in Plants?

10. Which one of the following statements about photoproteins in plants is INCORRECT?  (A) Phytochromes are activated by red light (B) Phytochromes are inactivated by far-red light (C) Cryptochromes are sensitive to blue light (D) Phototropins are insensitive to blue light

Plant Photoreceptors Explained

9. A growing shoot of a germinating seedling encounters an underground obstacle. Which one of the following hormones elicits ‘triple response’ to the underground obstacle?  (A) Auxin (B) Cytokinin (C) Ethylene (D) Gibberellins

Triple Response in Plants

8. Which one of the following is NOT a plant vascular tissue?  (A) Phloem (B) Periderm (C) Stele (D) Xylem

Which is NOT a Plant Vascular Tissue?

7. Which of the following acts as wound hormones in plants?  (A) Ethylene (B) Cytokinins (C) Abscisic acid (D) Dextrin

Wound Hormone in Plants

6. Transpirational pull that extends down to the roots in plants can be interrupted by  (A) Process of cavitation (B) Process of gravitation (C) Formation of water vapor pockets (D) Positive pressure in xylem sap

Transpirational Pull Interrupted

5. The osmotic potential (ψ) of pure water is _____ MPa.  (A) -1 (B) 0 (C) 0.1 (D) 10

Osmotic Potential of Pure Water is Zero

4. Indeterminate growth in plants is due to the presence of perpetually undifferentiated tissues, called as _____.  (A) Tracheids (B) Meristems (C) Parenchyma (D) Sclerenchyma

Indeterminate Growth in Plants Explained

3. Which of the following are produced by Mangrove trees to survive in the waterlogged swampy forests?  (A) Trichomes (B) Pneumatophores (C) Spermatophores (D) Rhizophores

Pneumatophores in Mangrove Trees

2. In plants, the ovules are attached to the ovary by (A) Placenta (B) Synergids (C) Embryo sac (D) Tube cells

Ovules are Attached to the Ovary

1. Which one of the following features distinguishes between gymnosperms and angiosperms?  (A) Seed formation (B) Vascular tissues (C) Seed cover (D) Gamete production

Difference Between Gymnosperms and Angiosperms

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