The non-cyclic photophosphorylation in photosystem II produces:

The correct answer is C: Both ATP and NADPH, and releases O₂. Non-cyclic photophosphorylation involves PSII and PSI, producing ATP, NADPH, and O₂ from water photolysis.

Which phenomenon explains the blue color of the sky?

The correct answer is B: Rayleigh scattering. Rayleigh scattering causes shorter blue wavelengths to scatter more effectively than longer red wavelengths when sunlight passes through the atmosphere, making the sky appear blue.

The pulling force that moves water upward in xylem vessels is primarily due to:

The correct answer is C: Transpirational pull (tension) in xylem. Cohesion-tension theory explains that water is pulled upward due to transpirational pull creating negative pressure in xylem.

The phenomenon where a material exhibits permanent magnetic properties is called:

The correct answer is C: Ferromagnetism. Ferromagnetism is the property of materials like iron, cobalt, and nickel to retain permanent magnetic properties due to aligned electron spins.

Which element is essential for the synthesis of chlorophyll molecule and forms the central atom in its structure?

The correct answer is B: Magnesium. Magnesium (Mg) is the central atom in the chlorophyll molecule, forming a coordinate bond with the porphyrin ring.

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Difficulty: All Easy Medium Hard 1–2 of 2

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All Physics 106 Chemistry 9 Biology 2 Botany 78 Human Body 4 Disease & Health 2 Space & Astronomy 5 Environment 1

Q.1 Easy Biology

Powerhouse of cell?

A Nucleus

B Ribosome

C Mitochondria

D Lysosome

Correct Answer: C. Mitochondria

EXPLANATION

Mitochondria produces ATP.

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Q.2 Easy Biology

DNA stands for?

A Deoxyribose Nucleic Acid

B Deoxyribonucleic Acid

C Double Nucleic Acid

D Deoxyribonicotinic Acid

Correct Answer: B. Deoxyribonucleic Acid

EXPLANATION

DNA = Deoxyribonucleic Acid.

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