Q. Which of the following wavelengths of light is least effective for photosynthesis? (2020)
A.
Red light
B.
Blue light
C.
Green light
D.
Yellow light
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Solution
Green light is least effective for photosynthesis because it is mostly reflected by chlorophyll.
Correct Answer: C — Green light
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Q. Which of the following waves requires a medium for propagation? (2022)
A.
Electromagnetic waves
B.
Sound waves
C.
Light waves
D.
Radio waves
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Solution
Sound waves require a medium (solid, liquid, or gas) for propagation, while electromagnetic waves do not.
Correct Answer: B — Sound waves
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Q. Which of the following waves requires a medium to travel? (2023)
A.
Electromagnetic waves
B.
Sound waves
C.
Radio waves
D.
Light waves
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Solution
Sound waves require a medium (solid, liquid, or gas) to travel, while electromagnetic waves can travel through a vacuum.
Correct Answer: B — Sound waves
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Q. Which organ is primarily responsible for filtering blood? (2021)
A.
Liver
B.
Heart
C.
Kidneys
D.
Lungs
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Solution
The kidneys filter blood to remove waste products and excess substances, maintaining homeostasis in the body.
Correct Answer: C — Kidneys
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Q. Which organ is primarily responsible for the excretion of urea? (2020)
A.
Liver
B.
Kidneys
C.
Lungs
D.
Skin
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Solution
The kidneys are primarily responsible for filtering blood and excreting urea in urine.
Correct Answer: B — Kidneys
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Q. Which organ is primarily responsible for the production of blood cells? (2021)
A.
Liver
B.
Spleen
C.
Bone marrow
D.
Kidneys
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Solution
Bone marrow is the primary site of blood cell production, including red blood cells, white blood cells, and platelets.
Correct Answer: C — Bone marrow
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Q. Which organelle contains digestive enzymes to break down waste materials? (2020)
A.
Peroxisome
B.
Lysosome
C.
Vesicle
D.
Ribosome
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Solution
Lysosomes contain digestive enzymes that break down waste materials and cellular debris.
Correct Answer: B — Lysosome
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Q. Which organelle is involved in the digestion of waste materials in the cell? (2023)
A.
Lysosome
B.
Peroxisome
C.
Ribosome
D.
Vesicle
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Solution
Lysosomes contain digestive enzymes that break down waste materials and cellular debris.
Correct Answer: A — Lysosome
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Q. Which organelle is involved in the modification and packaging of proteins? (2020)
A.
Lysosome
B.
Golgi Apparatus
C.
Endoplasmic Reticulum
D.
Nucleus
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Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
Correct Answer: B — Golgi Apparatus
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Q. Which organelle is involved in the synthesis of lipids? (2020)
A.
Rough endoplasmic reticulum
B.
Smooth endoplasmic reticulum
C.
Lysosome
D.
Peroxisome
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Solution
The smooth endoplasmic reticulum is involved in the synthesis of lipids and detoxification processes.
Correct Answer: B — Smooth endoplasmic reticulum
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Q. Which organelle is known for detoxifying harmful substances in the cell? (2022)
A.
Lysosome
B.
Peroxisome
C.
Ribosome
D.
Nucleus
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Solution
Peroxisomes are organelles that detoxify harmful substances and break down fatty acids.
Correct Answer: B — Peroxisome
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Q. Which organelle is known for its role in digestion within the cell? (2019)
A.
Lysosome
B.
Peroxisome
C.
Mitochondria
D.
Ribosome
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Solution
Lysosomes are known for their role in digestion within the cell, containing enzymes that break down waste materials and cellular debris.
Correct Answer: A — Lysosome
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Q. Which organelle is responsible for packaging and modifying proteins? (2021)
A.
Lysosome
B.
Golgi apparatus
C.
Nucleus
D.
Chloroplast
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Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
Correct Answer: B — Golgi apparatus
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Q. Which organism is commonly used as a host for cloning human genes? (2022)
A.
E. coli
B.
Yeast
C.
Mice
D.
All of the above
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Solution
E. coli is the most commonly used host for cloning human genes due to its rapid growth and well-understood genetics, but yeast and mice are also used in specific contexts.
Correct Answer: D — All of the above
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Q. Which p-block element is essential for the formation of DNA? (2023) 2023
A.
Oxygen
B.
Nitrogen
C.
Phosphorus
D.
Sulfur
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Solution
Phosphorus is essential for the formation of DNA as it is part of the backbone structure.
Correct Answer: C — Phosphorus
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Q. Which p-block element is known for its allotropes including diamond and graphite? (2020) 2020
A.
Carbon
B.
Silicon
C.
Germanium
D.
Tin
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Solution
Carbon is known for its allotropes, including diamond and graphite.
Correct Answer: A — Carbon
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Q. Which part of the brain is primarily responsible for controlling respiration? (2022)
A.
Cerebrum
B.
Cerebellum
C.
Medulla oblongata
D.
Pons
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Solution
The medulla oblongata is the part of the brain that controls the rhythm of breathing by sending signals to the respiratory muscles.
Correct Answer: C — Medulla oblongata
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Q. Which part of the brain is primarily responsible for coordinating voluntary movements? (2022)
A.
Cerebrum
B.
Cerebellum
C.
Brainstem
D.
Thalamus
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Solution
The cerebellum is primarily responsible for coordinating voluntary movements and maintaining balance.
Correct Answer: B — Cerebellum
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Q. Which part of the brain is responsible for regulating the rate of breathing? (2020)
A.
Cerebrum
B.
Cerebellum
C.
Medulla oblongata
D.
Pons
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Solution
The medulla oblongata is responsible for regulating the rate and depth of breathing by sending signals to the respiratory muscles.
Correct Answer: C — Medulla oblongata
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Q. Which part of the brain regulates the rhythm of breathing? (2022)
A.
Cerebrum
B.
Cerebellum
C.
Medulla oblongata
D.
Pons
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Solution
The medulla oblongata is the part of the brain that regulates the rhythm of breathing.
Correct Answer: C — Medulla oblongata
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Q. Which part of the cell contains the genetic material? (2020)
A.
Cytoplasm
B.
Cell membrane
C.
Nucleus
D.
Ribosome
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Solution
The nucleus contains the genetic material (DNA) of the cell.
Correct Answer: C — Nucleus
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Q. Which part of the cell is responsible for controlling cell activities? (2021)
A.
Cytoplasm
B.
Nucleus
C.
Mitochondria
D.
Golgi apparatus
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Solution
The nucleus contains the cell's genetic material and is responsible for controlling cell activities.
Correct Answer: B — Nucleus
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Q. Which part of the cell is responsible for controlling the cell's activities? (2018)
A.
Cytoplasm
B.
Nucleus
C.
Mitochondria
D.
Golgi apparatus
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Solution
The nucleus contains the cell's genetic material and controls its activities by regulating gene expression.
Correct Answer: B — Nucleus
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Q. Which part of the digestive system is primarily involved in the absorption of water? (2019)
A.
Stomach
B.
Small intestine
C.
Large intestine
D.
Esophagus
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Solution
The large intestine is primarily responsible for the absorption of water and electrolytes.
Correct Answer: C — Large intestine
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Q. Which part of the digestive system is primarily responsible for the absorption of nutrients? (2021)
A.
Mouth
B.
Stomach
C.
Small intestine
D.
Large intestine
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Solution
The small intestine is the primary site for the absorption of nutrients due to its large surface area and presence of villi.
Correct Answer: C — Small intestine
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Q. Which part of the digestive system is responsible for the absorption of water? (2019)
A.
Stomach
B.
Small intestine
C.
Large intestine
D.
Esophagus
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Solution
The large intestine is primarily responsible for the absorption of water and electrolytes.
Correct Answer: C — Large intestine
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Q. Which part of the female reproductive system is responsible for the production of eggs? (2022)
A.
Uterus
B.
Ovaries
C.
Fallopian tubes
D.
Vagina
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Solution
The ovaries are responsible for the production of eggs (ova) in the female reproductive system.
Correct Answer: B — Ovaries
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Q. Which part of the flower contains the pollen? (2020)
A.
Ovary
B.
Stigma
C.
Anther
D.
Style
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Solution
The anther is the part of the stamen that produces and contains pollen.
Correct Answer: C — Anther
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Q. Which part of the flower develops into fruit after fertilization? (2019)
A.
Stamen
B.
Carpel
C.
Petal
D.
Sepal
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Solution
The carpel, specifically the ovary part of the carpel, develops into fruit after fertilization.
Correct Answer: B — Carpel
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Q. Which part of the flower develops into fruit? (2023)
A.
Stamen
B.
Ovary
C.
Style
D.
Anther
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Solution
The ovary of the flower develops into the fruit after fertilization.
Correct Answer: B — Ovary
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