Q. Which structure in the flower contains the ovules? (2019)
-
A.
Anther
-
B.
Filament
-
C.
Ovary
-
D.
Style
Solution
The ovary contains the ovules, which develop into seeds after fertilization.
Correct Answer: C — Ovary
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Q. Which structure in the flower contains the pollen grains? (2019)
-
A.
Ovary
-
B.
Style
-
C.
Anther
-
D.
Stigma
Solution
The anther is the structure in the flower that contains the pollen grains.
Correct Answer: C — Anther
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Q. Which structure in the flower develops into seeds after fertilization? (2023)
-
A.
Ovary
-
B.
Stigma
-
C.
Anther
-
D.
Filament
Solution
The ovary develops into seeds after fertilization.
Correct Answer: A — Ovary
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Q. Which structure in the flower is responsible for producing ovules? (2023)
-
A.
Anther
-
B.
Ovary
-
C.
Filament
-
D.
Stigma
Solution
The ovary contains ovules, which develop into seeds after fertilization.
Correct Answer: B — Ovary
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Q. Which structure in the leaf is primarily responsible for gas exchange?
-
A.
Stomata
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B.
Cuticle
-
C.
Chloroplasts
-
D.
Xylem
Solution
Stomata are small openings on the leaf surface that allow for gas exchange, including the intake of carbon dioxide and the release of oxygen.
Correct Answer: A — Stomata
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Q. Which structure in the neuron is responsible for the generation of action potentials? (2019)
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A.
Dendrites
-
B.
Cell body
-
C.
Axon hillock
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D.
Myelin sheath
Solution
The axon hillock is the part of the neuron where action potentials are generated.
Correct Answer: C — Axon hillock
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Q. Which structure in the neuron is responsible for transmitting electrical impulses? (2019)
-
A.
Dendrites
-
B.
Cell body
-
C.
Axon
-
D.
Synapse
Solution
The axon is the part of the neuron that transmits electrical impulses away from the cell body.
Correct Answer: C — Axon
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Q. Which structure in the neuron is responsible for transmitting impulses away from the cell body? (2019)
-
A.
Dendrite
-
B.
Axon
-
C.
Synapse
-
D.
Node of Ranvier
Solution
The axon is the part of the neuron that transmits impulses away from the cell body.
Correct Answer: B — Axon
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Q. Which structure in the neuron is responsible for transmitting impulses to other neurons? (2019)
-
A.
Dendrites
-
B.
Cell body
-
C.
Axon
-
D.
Synapse
Solution
The axon is responsible for transmitting impulses away from the cell body to other neurons.
Correct Answer: C — Axon
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Q. Which structure in the plant regulates the opening and closing of stomata?
-
A.
Guard cells
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B.
Xylem vessels
-
C.
Phloem fibers
-
D.
Mesophyll cells
Solution
Guard cells surround the stomata and control their opening and closing, regulating gas exchange and transpiration.
Correct Answer: A — Guard cells
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Q. Which structure increases the surface area for absorption in the small intestine? (2022)
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A.
Villi
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B.
Microvilli
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C.
Plicae circulares
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D.
All of the above
Solution
All of the above structures (villi, microvilli, and plicae circulares) increase the surface area for absorption in the small intestine.
Correct Answer: D — All of the above
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Q. Which structure is involved in the synthesis of lipids? (2022)
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A.
Rough ER
-
B.
Smooth ER
-
C.
Golgi apparatus
-
D.
Lysosome
Solution
The smooth endoplasmic reticulum (Smooth ER) is involved in the synthesis of lipids and detoxification processes.
Correct Answer: B — Smooth ER
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Q. Which structure is responsible for controlling the activities of the cell? (2019)
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A.
Cell wall
-
B.
Nucleus
-
C.
Cytoplasm
-
D.
Ribosome
Solution
The nucleus controls the activities of the cell by regulating gene expression.
Correct Answer: B — Nucleus
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Q. Which structure is responsible for controlling the entry and exit of substances in a cell? (2022)
-
A.
Cell wall
-
B.
Plasma membrane
-
C.
Cytoplasm
-
D.
Nucleus
Solution
The plasma membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.
Correct Answer: B — Plasma membrane
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Q. Which structure is responsible for maintaining the shape of plant cells? (2021)
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A.
Cell membrane
-
B.
Cell wall
-
C.
Cytoplasm
-
D.
Chloroplast
Solution
The cell wall provides structural support and maintains the shape of plant cells.
Correct Answer: B — Cell wall
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Q. Which structure is responsible for packaging and modifying proteins? (2020)
-
A.
Nucleus
-
B.
Golgi apparatus
-
C.
Lysosome
-
D.
Vesicle
Solution
The Golgi apparatus is responsible for packaging and modifying proteins before they are sent to their destination.
Correct Answer: B — Golgi apparatus
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Q. Which structure is responsible for packaging and transporting proteins?
-
A.
Lysosome
-
B.
Golgi apparatus
-
C.
Rough endoplasmic reticulum
-
D.
Nucleus
Solution
The Golgi apparatus is responsible for packaging and transporting proteins to their destinations.
Correct Answer: B — Golgi apparatus
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Q. Which structure is responsible for photosynthesis in plant cells? (2021)
-
A.
Mitochondria
-
B.
Chloroplast
-
C.
Ribosome
-
D.
Vacuole
Solution
Chloroplasts are the organelles responsible for photosynthesis, converting light energy into chemical energy.
Correct Answer: B — Chloroplast
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Q. Which structure is responsible for pollen production? (2020)
-
A.
Ovary
-
B.
Anther
-
C.
Style
-
D.
Stigma
Solution
The anther is the part of the stamen that produces pollen.
Correct Answer: B — Anther
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Q. Which structure is responsible for the synthesis of ATP? (2022)
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A.
Chloroplast
-
B.
Mitochondria
-
C.
Nucleus
-
D.
Golgi apparatus
Solution
Mitochondria are responsible for the synthesis of ATP through cellular respiration.
Correct Answer: B — Mitochondria
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Q. Which structure is responsible for the synthesis of lipids? (2021)
-
A.
Smooth endoplasmic reticulum
-
B.
Rough endoplasmic reticulum
-
C.
Golgi apparatus
-
D.
Mitochondria
Solution
The smooth endoplasmic reticulum is involved in the synthesis of lipids and detoxification processes.
Correct Answer: A — Smooth endoplasmic reticulum
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Q. Which structure is responsible for the synthesis of ribosomal RNA? (2021)
-
A.
Nucleus
-
B.
Nucleolus
-
C.
Ribosome
-
D.
Endoplasmic reticulum
Solution
The nucleolus is the site within the nucleus where ribosomal RNA (rRNA) is synthesized.
Correct Answer: B — Nucleolus
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Q. Which structure is responsible for the transport of sperm? (2020)
-
A.
Urethra
-
B.
Vas deferens
-
C.
Seminal vesicle
-
D.
Prostate gland
Solution
The vas deferens is responsible for the transport of sperm from the epididymis to the ejaculatory duct.
Correct Answer: B — Vas deferens
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Q. Which structure is selectively permeable and regulates the entry and exit of substances in a cell?
-
A.
Cell wall
-
B.
Plasma membrane
-
C.
Nuclear membrane
-
D.
Cytoplasm
Solution
The plasma membrane is selectively permeable, allowing certain substances to pass while blocking others.
Correct Answer: B — Plasma membrane
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Q. Which structure prevents the backflow of food from the stomach to the esophagus? (2020)
-
A.
Pyloric sphincter
-
B.
Cardiac sphincter
-
C.
Ileocecal valve
-
D.
Anal sphincter
Solution
The cardiac sphincter, also known as the lower esophageal sphincter, prevents the backflow of food from the stomach to the esophagus.
Correct Answer: B — Cardiac sphincter
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Q. Which structure protects the developing seeds in a flowering plant? (2021)
-
A.
Ovary
-
B.
Anther
-
C.
Filament
-
D.
Pistil
Solution
The ovary protects the developing seeds and will mature into the fruit after fertilization.
Correct Answer: A — Ovary
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Q. Which type of blood vessel carries oxygenated blood away from the heart? (2022)
-
A.
Veins
-
B.
Capillaries
-
C.
Arteries
-
D.
Venules
Solution
Arteries are the blood vessels that carry oxygenated blood away from the heart to the tissues, except for the pulmonary arteries.
Correct Answer: C — Arteries
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Q. Which type of blood vessel is primarily responsible for nutrient and gas exchange? (2019)
-
A.
Arteries
-
B.
Veins
-
C.
Capillaries
-
D.
Arterioles
Solution
Capillaries are the smallest blood vessels and are the sites of exchange of oxygen, carbon dioxide, nutrients, and waste products.
Correct Answer: C — Capillaries
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Q. Which type of cell division results in two identical daughter cells? (2020)
-
A.
Meiosis
-
B.
Mitosis
-
C.
Binary fission
-
D.
Budding
Solution
Mitosis is the type of cell division that results in two identical daughter cells.
Correct Answer: B — Mitosis
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Q. Which type of connective tissue connects muscles to bones? (2023)
-
A.
Tendons
-
B.
Ligaments
-
C.
Cartilage
-
D.
Adipose tissue
Solution
Tendons are connective tissues that connect muscles to bones, facilitating movement.
Correct Answer: A — Tendons
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