Q. Which organ is primarily responsible for filtering blood in the human body?
A.
Liver
B.
Heart
C.
Kidneys
D.
Lungs
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Solution
The kidneys filter blood to remove waste and excess substances, producing urine.
Correct Answer:
C
— Kidneys
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Q. Which organ is responsible for filtering blood in the human body? (2020)
A.
Liver
B.
Heart
C.
Kidneys
D.
Lungs
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Solution
The kidneys are responsible for filtering blood, removing waste products and excess substances to form urine.
Correct Answer:
C
— Kidneys
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Q. Which organ is responsible for the production of insulin?
A.
Liver
B.
Pancreas
C.
Kidneys
D.
Stomach
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Solution
The pancreas produces insulin, which helps regulate blood sugar levels in the body.
Correct Answer:
B
— Pancreas
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Q. Which organelle is found only in plant cells and is responsible for photosynthesis?
A.
Mitochondria
B.
Chloroplast
C.
Ribosome
D.
Lysosome
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Solution
Chloroplasts contain chlorophyll and are responsible for converting sunlight into energy through photosynthesis.
Correct Answer:
B
— Chloroplast
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Q. Which organelle is found only in plant cells?
A.
Mitochondria
B.
Chloroplast
C.
Ribosome
D.
Nucleus
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Solution
Chloroplasts are the organelles responsible for photosynthesis and are found only in plant cells.
Correct Answer:
B
— Chloroplast
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Q. Which organelle is involved in the synthesis of ribosomal RNA?
A.
Nucleus
B.
Nucleolus
C.
Rough endoplasmic reticulum
D.
Golgi apparatus
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Solution
The nucleolus is responsible for synthesizing ribosomal RNA (rRNA) and assembling ribosomes.
Correct Answer:
B
— Nucleolus
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Q. Which organelle is responsible for energy production in the cell?
A.
Nucleus
B.
Ribosome
C.
Mitochondria
D.
Endoplasmic Reticulum
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Solution
Mitochondria are known as the powerhouse of the cell, where ATP is produced through cellular respiration.
Correct Answer:
C
— Mitochondria
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Q. Which organelle is responsible for producing ATP?
A.
Nucleus
B.
Ribosome
C.
Mitochondria
D.
Endoplasmic Reticulum
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Solution
Mitochondria are known as the powerhouse of the cell, where ATP is produced through cellular respiration.
Correct Answer:
C
— Mitochondria
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Q. Which part of the brain is responsible for regulating heart rate and breathing?
A.
Cerebrum
B.
Cerebellum
C.
Medulla oblongata
D.
Thalamus
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Solution
The medulla oblongata controls autonomic functions such as heart rate and breathing.
Correct Answer:
C
— Medulla oblongata
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Q. Which part of the brain is responsible for regulating heart rate?
A.
Cerebrum
B.
Cerebellum
C.
Medulla oblongata
D.
Thalamus
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Solution
The medulla oblongata controls autonomic functions, including heart rate and breathing.
Correct Answer:
C
— Medulla oblongata
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Q. Which part of the cell is responsible for packaging and modifying proteins?
A.
Golgi apparatus
B.
Lysosome
C.
Nucleus
D.
Mitochondria
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Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
Correct Answer:
A
— Golgi apparatus
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Q. Which part of the nervous system controls involuntary actions?
A.
Central nervous system
B.
Peripheral nervous system
C.
Autonomic nervous system
D.
Somatic nervous system
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Solution
The autonomic nervous system controls involuntary actions such as heart rate, digestion, and respiratory rate.
Correct Answer:
C
— Autonomic nervous system
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Q. Which part of the plant is primarily responsible for nutrient absorption?
A.
Leaves
B.
Stems
C.
Roots
D.
Flowers
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Solution
Roots are the primary organs for nutrient and water absorption from the soil, anchoring the plant and providing stability.
Correct Answer:
C
— Roots
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Q. Which part of the plant is primarily responsible for the uptake of water and minerals? (2020)
A.
Leaves
B.
Stems
C.
Roots
D.
Flowers
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Solution
Roots are specialized for absorbing water and nutrients from the soil, making them crucial for plant growth.
Correct Answer:
C
— Roots
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Q. Which pigment is primarily responsible for photosynthesis in plants?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Anthocyanins
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Solution
Chlorophyll a is the main pigment involved in photosynthesis, absorbing light energy to convert carbon dioxide and water into glucose and oxygen.
Correct Answer:
A
— Chlorophyll a
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Q. Which pigment is primarily responsible for the absorption of light in photosynthesis?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Chlorophyll b
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Solution
Chlorophyll a is the main pigment involved in photosynthesis, absorbing light primarily in the blue and red wavelengths.
Correct Answer:
A
— Chlorophyll a
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Q. Which pigment is primarily responsible for the green color of plants?
A.
Carotenoids
B.
Chlorophyll
C.
Xanthophyll
D.
Anthocyanins
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Solution
Chlorophyll is the pigment that gives plants their green color and is essential for photosynthesis, allowing plants to absorb light energy.
Correct Answer:
B
— Chlorophyll
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Q. Which pigment is responsible for the red color in plants? (2021)
A.
Chlorophyll
B.
Carotenoids
C.
Anthocyanins
D.
Xanthophylls
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Solution
Anthocyanins are pigments that give red, purple, and blue colors to many plants.
Correct Answer:
C
— Anthocyanins
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Q. Which pigment is responsible for the red color in some plants? (2019)
A.
Chlorophyll
B.
Carotenoids
C.
Anthocyanins
D.
Xanthophylls
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Solution
Anthocyanins are pigments that give red, purple, and blue colors to many plants, especially in fruits and flowers.
Correct Answer:
C
— Anthocyanins
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Q. Which process describes the movement of water from the roots to the leaves of a plant?
A.
Translocation
B.
Transpiration
C.
Absorption
D.
Capillarity
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Solution
Translocation refers to the movement of water and nutrients through the plant, specifically from the roots to the leaves.
Correct Answer:
A
— Translocation
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Q. Which process describes the movement of water from the roots to the leaves?
A.
Translocation
B.
Transpiration
C.
Absorption
D.
Capillarity
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Solution
Translocation refers to the movement of water and nutrients through the plant, specifically from the roots to the leaves.
Correct Answer:
A
— Translocation
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Q. Which process do plants use to convert sunlight into chemical energy? (2019)
A.
Respiration
B.
Photosynthesis
C.
Fermentation
D.
Transpiration
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Solution
Photosynthesis is the process by which plants convert sunlight into chemical energy stored in glucose.
Correct Answer:
B
— Photosynthesis
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Q. Which process involves the conversion of light energy into chemical energy?
A.
Respiration
B.
Transpiration
C.
Photosynthesis
D.
Fermentation
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Solution
Photosynthesis is the process by which plants convert light energy into chemical energy stored in glucose.
Correct Answer:
C
— Photosynthesis
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Q. Which process involves the movement of water across a semipermeable membrane?
A.
Diffusion
B.
Osmosis
C.
Active transport
D.
Facilitated diffusion
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Solution
Osmosis is the process of water movement across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.
Correct Answer:
B
— Osmosis
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Q. Which process involves the movement of water from the roots to the leaves of a plant?
A.
Transpiration
B.
Photosynthesis
C.
Glycolysis
D.
Respiration
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Solution
Transpiration is the process where water is absorbed by plant roots and moves through the plant to evaporate from the leaves.
Correct Answer:
A
— Transpiration
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Q. Which process involves the movement of water from the roots to the leaves?
A.
Transpiration
B.
Photosynthesis
C.
Respiration
D.
Germination
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Solution
Transpiration is the process through which water is absorbed by plant roots and then evaporated from the leaves, creating a continuous flow of water.
Correct Answer:
A
— Transpiration
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Q. Which structure is found in plant cells but not in animal cells?
A.
Cell membrane
B.
Mitochondria
C.
Chloroplasts
D.
Ribosomes
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Solution
Chloroplasts are found in plant cells and are responsible for photosynthesis, while animal cells do not have them.
Correct Answer:
C
— Chloroplasts
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Q. Which structure is found only in plant cells?
A.
Mitochondria
B.
Chloroplast
C.
Nucleus
D.
Ribosome
Show solution
Solution
Chloroplasts are the organelles responsible for photosynthesis and are found only in plant cells.
Correct Answer:
B
— Chloroplast
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Q. Which structure is involved in the modification and packaging of proteins?
A.
Nucleus
B.
Golgi apparatus
C.
Ribosome
D.
Endoplasmic Reticulum
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Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or use within the cell.
Correct Answer:
B
— Golgi apparatus
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Q. Which system is primarily responsible for hormone production? (2021)
A.
Nervous system
B.
Endocrine system
C.
Respiratory system
D.
Muscular system
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Solution
The endocrine system is primarily responsible for hormone production and regulation in the body.
Correct Answer:
B
— Endocrine system
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