Kerala PSC
Topic Practice

Plant Tissues & Plant Nutrition

Practice questions and strengthen your understanding.

20 Questions
Question 1 / 20
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Q1 Multiple Choice Question

Coconut husk coir fibers and the gritty texture of pear fruit flesh (stone cells / sclereids) are formed by which dead permanent tissue possessing heavily lignified cell walls?

Q2 Multiple Choice Question

In the non-cyclic photophosphorylation (Z-Scheme) of oxygenic photosynthesis, what is the correct sequential pathway of electrons mobilized from water to NADP+?

Q3 Multiple Choice Question

Biological nitrogen fixation catalyzed by the bacterial Nitrogenase enzyme complex consumes a tremendous amount of metabolic energy; what is the theoretical stoichiometry of ATP required to reduce one molecule of atmospheric N2 into two molecules of Ammonia (NH3)?

Q4 Multiple Choice Question

The swelling of dry plant seeds and wooden doors/windows during the rainy monsoon season due to surface adsorption of water molecules by hydrophilic cell-wall colloids without forming a solution is called:

Q5 Multiple Choice Question

The physical scratching, chipping, or acid-etching of a hard impermeable seed coat to break coat-imposed seed dormancy and facilitate water uptake is known as:

Q6 Multiple Choice Question

Certain plant tissues (such as the spadix of blooming Arum lilies) can produce intense heat (thermogenesis) to volatilize foul odors attracting pollinators because their mitochondria possess which cyanide-resistant bypass enzyme?

Q7 Multiple Choice Question

At the culmination of the mitochondrial Electron Transport Chain (ETC) on the inner membrane, what serves as the ultimate terminal electron acceptor, reducing to form metabolic water?

Q8 Multiple Choice Question

In plant roots, water transport through continuous non-living cell walls and intercellular spaces without crossing any cell membrane is called the 'Apoplast', whereas water moving through living protoplasts connected by plasmodesmata is the:

Q9 Multiple Choice Question

Tropical plants such as Sugarcane, Maize, and Sorghum exhibit a specialized leaf internal anatomy featuring bundle sheath cells arranged like a wreath around vascular bundles, known as:

Q10 Multiple Choice Question

In old woody tree trunks, the dark, non-functional central core of secondary xylem that is packed with tannins, resins, and tyloses—providing mechanical strength and termite resistance—is called:

Q11 Multiple Choice Question

Khaira disease of rice, an extensive physiological disorder causing chlorosis and reddish-brown pigmentation on young seedling leaves, is caused by the soil deficiency of which micronutrient?

Q12 Multiple Choice Question

Balloon-like cellular ingrowths from adjacent xylem parenchyma cells that protrude through pits into the lumen of old non-conducting xylem vessels, plugging them to prevent pathogen entry, are called:

Q13 Multiple Choice Question

In photosynthetic machinery, which pigment functions as the universal 'Reaction Center' (Primary photosynthetic pigment), while Chlorophyll b, Carotenes, and Xanthophylls serve as accessory antenna pigments?

Q14 Multiple Choice Question

In monocotyledonous grass leaves (such as sugarcane and maize), specialized large, empty, bubble-like epidermal cells that lose turgor during drought stress to roll the leaf inward to reduce water loss are called:

Q15 Multiple Choice Question

Mangrove halophytes (such as Rhizophora and Avicennia) growing in saline, oxygen-deficient coastal marshes exhibit which two specialized adaptations for reproduction and respiration?

Q16 Multiple Choice Question

The analysis of annual growth ring patterns in ancient trees such as the Bristlecone Pine (Pinus longaeva) provides an invaluable continuous climatic record spanning over 8,000 years and is scientifically essential for:

Q17 Multiple Choice Question

During secondary growth in dicot stems, the protective periderm consists of three layers; which layer is the Cork Cambium that cuts off Phellem (cork) to the outside and Phelloderm to the inside?

Q18 Multiple Choice Question

The directional growth of a germinating Pollen Tube through the style towards the female embryo sac in the ovule is a classic example of which plant movement?

Q19 Multiple Choice Question

The Citric Acid Cycle (TCA cycle), which completely oxidizes acetyl groups into CO2 and reduced coenzymes, occurs inside which organellar compartment and was elucidated by which biochemist?

Q20 Multiple Choice Question

Grasses (Poaceae), sedges, and horsetails (Equisetum) deposit microscopic, highly durable amorphous silica bodies in their epidermal cell walls, which deter insect herbivory and preserve indefinitely in archaeological sediments as:

Practice Completed!

You have completed the Plant Tissues & Plant Nutrition practice.

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