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
-
B.
Microvilli
-
C.
Plicae circulares
-
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 found in plant cells but not in animal cells?
-
A.
Cell membrane
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B.
Mitochondria
-
C.
Chloroplasts
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D.
Ribosomes
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 involved in the synthesis of lipids? (2022)
-
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)
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A.
Nucleus
-
B.
Golgi apparatus
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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)
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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 substituent has both +M and -I effects?
-
A.
-OH
-
B.
-NH2
-
C.
-COOH
-
D.
-NO2
Solution
-NH2 has a +M effect due to resonance donation and a -I effect due to electronegativity.
Correct Answer: B — -NH2
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Q. Which substituent is a strong +I and +M director?
-
A.
-NO2
-
B.
-OH
-
C.
-CN
-
D.
-COOH
Solution
-OH is a strong +I and +M director due to its ability to donate electron density through resonance.
Correct Answer: B — -OH
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Q. Which substituent is a strong +M director?
-
A.
-CHO
-
B.
-NO2
-
C.
-OH
-
D.
-Br
Solution
The -OH group is a strong +M director due to its ability to donate electron density through resonance.
Correct Answer: C — -OH
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Q. Which system in the body is primarily responsible for fighting infections?
-
A.
Nervous System
-
B.
Digestive System
-
C.
Immune System
-
D.
Respiratory System
Solution
The immune system is primarily responsible for fighting infections.
Correct Answer: C — Immune System
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Q. Which system is responsible for the body's response to stress?
-
A.
Nervous system
-
B.
Endocrine system
-
C.
Immune system
-
D.
Both A and B
Solution
Both the nervous and endocrine systems work together to manage the body's response to stress.
Correct Answer: D — Both A and B
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Q. Which system is responsible for the exchange of gases in the body? (2023)
-
A.
Digestive system
-
B.
Nervous system
-
C.
Respiratory system
-
D.
Circulatory system
Solution
The respiratory system is responsible for the exchange of gases in the body.
Correct Answer: C — Respiratory system
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Q. Which system is responsible for the production of hormones in the body?
-
A.
Nervous system
-
B.
Endocrine system
-
C.
Circulatory system
-
D.
Muscular system
Solution
The endocrine system produces hormones that regulate various functions in the body, including growth, metabolism, and mood.
Correct Answer: B — Endocrine system
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Q. Which system is responsible for the production of hormones?
-
A.
Nervous system
-
B.
Endocrine system
-
C.
Circulatory system
-
D.
Muscular system
Solution
The endocrine system produces hormones that regulate various functions in the body.
Correct Answer: B — Endocrine system
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Q. Which tab in Word would you use to change the font style? (2023)
-
A.
Home
-
B.
Insert
-
C.
Layout
-
D.
Review
Solution
The Home tab in Word is where you can change the font style.
Correct Answer: A — Home
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