In bryophytes, the dominant generation is gametophytic, while in pteridophytes it shifts to sporophytic dominance. Which of the following best explains the evolutionary advantage of this transition?

The correct answer is D: Both A and C are correct. The shift from gametophytic to sporophytic dominance in pteridophytes is advantageous because: (1) Sporophytes with indeterminate growth can produce more spores, increasing reproductive success, and (2) Spores with thick protective walls (sporopollenin) can survive in drier environments, reducing de

Identify the correct sequence in the development of male gametophyte:

The correct answer is B: Microsporocyte → Microspore → Pollen grain. The correct sequence is: Microsporocyte undergoes meiosis to form microspores, which undergo mitosis to form mature pollen grain (male gametophyte).

Which cells regulate the opening and closing of stomata?

The correct answer is B: Guard cells. Guard cells are specialized epidermal cells that change shape to open or close the stomatal pore.

In ferns, the photosynthetically active independent structure is:

The correct answer is B: Prothallus. The prothallus is the gametophyte of ferns - a small, green, heart-shaped structure that is photosynthetically active and independent.

The transformation of protophloem into metaphloem in developing roots results in:

The correct answer is A: Collapse of protophloem elements and formation of obliteration tissue. As the root grows and matures, protophloem sieve tubes collapse and are obliterated, replaced functionally by metaphloem which lies closer to the periphery.

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NEET Botany
Biotechnology in Plants

Botany questions for NEET UG — Plant Anatomy, Physiology, Reproduction, Ecology.

6 Q 7 Topics Take Mock Test

Difficulty: All Easy Medium Hard 1–6 of 6

Topics in NEET Botany

All Plant Kingdom 100 Plant Anatomy 100 Plant Physiology 100 Reproduction in Plants 60 Genetics & Heredity 20 Ecology & Environment 20 Biotechnology in Plants 20

Q.1 Easy Biotechnology in Plants

Which of the following is an example of a genetically modified crop approved in India as of 2024?

A Bt Soybean

B Bt Cotton

C Bt Wheat

D Bt Tomato

Correct Answer: B. Bt Cotton

EXPLANATION

Bt Cotton is the only GM crop commercially cultivated and approved in India since 2002, with extensive adoption across states.

Test

Q.2 Easy Biotechnology in Plants

What is the role of selectable markers in plant genetic engineering?

A To identify transformed plant cells

B To enhance photosynthesis

C To increase yield

D To improve taste

Correct Answer: A. To identify transformed plant cells

EXPLANATION

Selectable markers (like antibiotic resistance genes) help identify and select successfully transformed plant cells from non-transformed ones.

Test

Q.3 Easy Biotechnology in Plants

Which enzyme is used to cut DNA at specific recognition sequences during genetic engineering?

A DNA polymerase

B Restriction endonuclease

C Ligase

D Primase

Correct Answer: B. Restriction endonuclease

EXPLANATION

Restriction endonucleases (restriction enzymes) recognize and cut DNA at specific palindromic sequences, essential for cloning.

Test

Q.4 Easy Biotechnology in Plants

Bt cotton is transgenic cotton resistant to which pest?

A Armyworm

B Bollworm

C Leafhopper

D Jassid

Correct Answer: B. Bollworm

EXPLANATION

Bt cotton produces Cry1Ac protein from Bacillus thuringiensis that provides resistance against the cotton bollworm (Helicoverpa armigera).

Test

Q.5 Easy Biotechnology in Plants

What is the full form of ELISA in the context of plant biotechnology?

A Enzyme-Linked Immunosorbent Assay

B Enzyme-Linked Immunological System Analysis

C Enzyme-Linked Immunosorption Assay

D Enzyme-Linked Immunosignal Assessment

Correct Answer: A. Enzyme-Linked Immunosorbent Assay

EXPLANATION

ELISA (Enzyme-Linked Immunosorbent Assay) is a technique used to detect pathogens and transgenes in plants.

Test

Q.6 Easy Biotechnology in Plants

Which of the following is the most commonly used vector for plant genetic engineering?

A Agrobacterium tumefaciens

B Escherichia coli

C Bacillus subtilis

D Pseudomonas aeruginosa

Correct Answer: A. Agrobacterium tumefaciens

EXPLANATION

Agrobacterium tumefaciens is the natural genetic engineer of plants. Its Ti plasmid is widely used for transferring foreign DNA into plant cells.

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NEET Botany
Biotechnology in Plants