Q71. The aleurone layer in cereal grains is rich in:
[A] Starch
[B] Proteins
[C] Lipids
[D] Cellulose
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Correct Answer: [B] Proteins
Explanation: Aleurone layer is the outermost proteinaceous layer of the endosperm in cereal grains (like maize, wheat, barley). It is rich in proteins and enzymes, and plays a role in digestion and mobilization of endosperm reserves during seed germination. Starch is in the main endosperm, lipids in oilseeds, and cellulose is in cell walls, but aleurone layer is specifically protein-rich.
Q72. Aleurone layer is part of:
[A] Seed coat
[B] Endosperm
[C] Embryo
[D] Pericarp
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Correct Answer: [B] Endosperm
Explanation: Aleurone layer is part of the endosperm in cereal grains. It is the outermost layer of the endosperm, surrounding the starchy endosperm. Seed coat is derived from integuments, embryo from zygote, and pericarp from ovary wall, aleurone is specifically endosperm-related.
Q73. Which of the following tissue systems provides mechanical support, protection, and storage in plants?
[A] Epidermal tissue system
[B] Vascular tissue system
[C] Ground tissue system
[D] Conducting tissue system
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Correct Answer: [C] Ground tissue system
Q74. Which of the following is NOT a function of epidermal tissue system?
[A] Protection from mechanical injury
[B] Prevention of water loss
[C] Gaseous exchange through stomata
[D] Conduction of water and minerals
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Correct Answer: [D] Conduction of water and minerals
Q75. Cork cambium is also known as:
[A] Phelloderm
[B] Phellem
[C] Phellogen
[D] Periderm
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Correct Answer: [C] Phellogen
Q76. Cork is also known as:
[A] Phellogen
[B] Phelloderm
[C] Phellem
[D] Periderm
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Correct Answer: [C] Phellem
Q77. Secondary cortex is also known as:
[A] Phellogen
[B] Phellem
[C] Phelloderm
[D] Periderm
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Correct Answer: [C] Phelloderm
Q78. The region of root tip just behind the root cap is:
[A] Region of maturation
[B] Region of elongation
[C] Region of meristematic activity
[D] Region of root hairs
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Correct Answer: [C] Region of meristematic activity
Q79. The region of root responsible for increase in root length is:
[A] Region of maturation
[B] Region of elongation
[C] Region of meristematic activity
[D] Root cap region
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Correct Answer: d) Pottery
Explanation: Inscriptions, coins, and manuscripts are all sources of Ancient Indian history, but pottery is not considered a significant source.
Q79. The region of root responsible for increase in root length is:
[A] Region of maturation
[B] Region of elongation
[C] Region of meristematic activity
[D] Root cap region
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Correct Answer: [B] Region of elongation
Q80. The region of root where differentiation and maturation of cells occur is:
[A] Region of elongation
[B] Region of meristematic activity
[C] Region of maturation
[D] Root cap region
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Correct Answer: [C] Region of maturation