Q. What is the main component of the cell wall in green algae?
-
A.
Cellulose
-
B.
Chitin
-
C.
Silica
-
D.
Pectin
Solution
Cellulose is the main component of the cell wall in green algae.
Correct Answer:
A
— Cellulose
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Q. What is the main dietary source of omega-3 fatty acids?
-
A.
Red meat
-
B.
Fish
-
C.
Dairy products
-
D.
Vegetable oils
Solution
Fish, particularly fatty fish like salmon, are the primary dietary source of omega-3 fatty acids.
Correct Answer:
B
— Fish
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Q. What is the main disadvantage of using chemical sterilants?
-
A.
They are ineffective
-
B.
They can be toxic
-
C.
They are time-consuming
-
D.
They are expensive
Solution
The main disadvantage of using chemical sterilants is that they can be toxic to humans and require careful handling.
Correct Answer:
B
— They can be toxic
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Q. What is the main disadvantage of using paper chromatography?
-
A.
It is time-consuming
-
B.
It has low resolution
-
C.
It requires expensive equipment
-
D.
It cannot separate small molecules
Solution
The main disadvantage of paper chromatography is its low resolution compared to other methods.
Correct Answer:
B
— It has low resolution
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Q. What is the main effect of natriuretic peptides on renal function?
-
A.
Increase sodium reabsorption
-
B.
Decrease glomerular filtration rate
-
C.
Promote diuresis
-
D.
Stimulate renin release
Solution
Natriuretic peptides promote diuresis by inhibiting sodium reabsorption and increasing urine output, helping to lower blood pressure.
Correct Answer:
C
— Promote diuresis
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Q. What is the main energy currency of the cell?
-
A.
NADH
-
B.
FADH2
-
C.
ATP
-
D.
GTP
Solution
ATP (adenosine triphosphate) is the main energy currency of the cell, used for various cellular processes.
Correct Answer:
C
— ATP
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Q. What is the main ethical concern associated with gene editing in humans?
-
A.
Cost of treatment
-
B.
Potential for designer babies
-
C.
Availability of technology
-
D.
Public acceptance
Solution
The main ethical concern with gene editing in humans is the potential for creating 'designer babies' with selected traits.
Correct Answer:
B
— Potential for designer babies
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Q. What is the main function of a trickling filter in wastewater treatment?
-
A.
To aerate the water
-
B.
To remove solids
-
C.
To promote microbial growth
-
D.
To disinfect the effluent
Solution
The main function of a trickling filter is to promote microbial growth on the filter media, which helps in the breakdown of organic matter.
Correct Answer:
C
— To promote microbial growth
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Q. What is the main function of flow cytometry?
-
A.
To analyze the physical and chemical characteristics of cells
-
B.
To culture bacteria
-
C.
To perform genetic sequencing
-
D.
To visualize cellular structures
Solution
Flow cytometry is primarily used to analyze the physical and chemical characteristics of cells in a fluid as they pass through a laser.
Correct Answer:
A
— To analyze the physical and chemical characteristics of cells
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Q. What is the main function of lipids in biological membranes?
-
A.
Energy storage
-
B.
Structural support
-
C.
Catalysis of reactions
-
D.
Information storage
Solution
Lipids, particularly phospholipids, provide structural support and form the bilayer of biological membranes.
Correct Answer:
B
— Structural support
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Q. What is the main function of proteins in the body?
-
A.
To provide energy
-
B.
To build and repair tissues
-
C.
To store nutrients
-
D.
To regulate body temperature
Solution
Proteins are crucial for building and repairing tissues, as well as serving as enzymes and hormones.
Correct Answer:
B
— To build and repair tissues
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Q. What is the main function of red blood cells in the cardiovascular system?
-
A.
To fight infections
-
B.
To transport oxygen
-
C.
To regulate blood pressure
-
D.
To clot blood
Solution
The main function of red blood cells is to transport oxygen from the lungs to the body's tissues.
Correct Answer:
B
— To transport oxygen
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Q. What is the main function of the amniotic fluid?
-
A.
Nutrient supply
-
B.
Shock absorption
-
C.
Gas exchange
-
D.
Waste removal
Solution
Amniotic fluid provides cushioning and shock absorption for the developing fetus.
Correct Answer:
B
— Shock absorption
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Q. What is the main function of the bacterial capsule?
-
A.
Energy storage
-
B.
Protection against phagocytosis
-
C.
DNA replication
-
D.
Protein synthesis
Solution
The bacterial capsule serves as a protective layer that helps bacteria evade the host's immune system by preventing phagocytosis.
Correct Answer:
B
— Protection against phagocytosis
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Q. What is the main function of the cardiovascular system?
-
A.
To digest food
-
B.
To transport blood and nutrients
-
C.
To regulate body temperature
-
D.
To produce hormones
Solution
The main function of the cardiovascular system is to transport blood, which carries nutrients, oxygen, and waste products throughout the body.
Correct Answer:
B
— To transport blood and nutrients
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Q. What is the main function of the endocrine system?
-
A.
To provide structural support
-
B.
To produce and secrete hormones
-
C.
To facilitate movement
-
D.
To protect against pathogens
Solution
The main function of the endocrine system is to produce and secrete hormones that regulate various bodily functions.
Correct Answer:
B
— To produce and secrete hormones
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Q. What is the main function of the kidneys?
-
A.
Produce hormones
-
B.
Filter blood
-
C.
Digest food
-
D.
Store bile
Solution
The primary function of the kidneys is to filter blood, removing waste products and excess substances to form urine.
Correct Answer:
B
— Filter blood
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Q. What is the main function of the large intestine?
-
A.
Absorption of water and electrolytes
-
B.
Digestion of proteins
-
C.
Production of bile
-
D.
Storage of urine
Solution
The large intestine's main function is to absorb water and electrolytes from indigestible food matter.
Correct Answer:
A
— Absorption of water and electrolytes
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Q. What is the main function of the occipital lobe?
-
A.
Processing auditory information
-
B.
Processing visual information
-
C.
Regulating emotions
-
D.
Controlling motor functions
Solution
The occipital lobe is primarily responsible for processing visual information.
Correct Answer:
B
— Processing visual information
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Q. What is the main function of the spleen?
-
A.
Production of bile
-
B.
Filtration of blood
-
C.
Storage of urine
-
D.
Secretion of insulin
Solution
The spleen's main function is to filter blood and remove old or damaged red blood cells.
Correct Answer:
B
— Filtration of blood
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Q. What is the main function of thyroid hormones?
-
A.
Regulate metabolism
-
B.
Control blood pressure
-
C.
Stimulate growth
-
D.
Maintain calcium levels
Solution
Thyroid hormones, primarily thyroxine (T4) and triiodothyronine (T3), are crucial for regulating the body's metabolism.
Correct Answer:
A
— Regulate metabolism
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Q. What is the main goal of water treatment?
-
A.
To make water taste better
-
B.
To ensure water is safe for consumption
-
C.
To increase water supply
-
D.
To reduce water temperature
Solution
The main goal of water treatment is to ensure that water is safe for human consumption.
Correct Answer:
B
— To ensure water is safe for consumption
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Q. What is the main greenhouse gas emitted by human activities?
-
A.
Ozone
-
B.
Carbon dioxide
-
C.
Methane
-
D.
Nitrous oxide
Solution
Carbon dioxide is the primary greenhouse gas emitted through human activities, particularly from burning fossil fuels.
Correct Answer:
B
— Carbon dioxide
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Q. What is the main health benefit of consuming berries?
-
A.
High fiber content
-
B.
Rich in antioxidants
-
C.
Low calorie
-
D.
All of the above
Solution
Berries are known for being high in fiber, low in calories, and rich in antioxidants, contributing to overall health.
Correct Answer:
D
— All of the above
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Q. What is the main health benefit of consuming yogurt?
-
A.
High in fiber
-
B.
Probiotic properties
-
C.
Rich in iron
-
D.
Low in calories
Solution
Yogurt contains probiotics, which are beneficial for gut health.
Correct Answer:
B
— Probiotic properties
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Q. What is the main health concern associated with consuming processed meats?
-
A.
High cholesterol
-
B.
Sodium content
-
C.
Trans fats
-
D.
Carbohydrates
Solution
The main health concern associated with consuming processed meats is their high sodium content.
Correct Answer:
B
— Sodium content
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Q. What is the main health risk associated with prolonged exposure to asbestos?
-
A.
Lung cancer
-
B.
Skin irritation
-
C.
Hearing loss
-
D.
Kidney damage
Solution
Prolonged exposure to asbestos is primarily associated with an increased risk of lung cancer and mesothelioma.
Correct Answer:
A
— Lung cancer
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Q. What is the main ingredient in beer that contributes to its bitterness?
-
A.
Hops
-
B.
Barley
-
C.
Yeast
-
D.
Water
Solution
Hops are the main ingredient in beer that contributes to its bitterness.
Correct Answer:
A
— Hops
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Q. What is the main ingredient in traditional pickles?
-
A.
Carrots
-
B.
Cucumbers
-
C.
Radishes
-
D.
Peppers
Solution
Traditional pickles are primarily made from cucumbers.
Correct Answer:
B
— Cucumbers
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Q. What is the main laboratory method used to identify Mycobacterium tuberculosis?
-
A.
Gram stain
-
B.
Acid-fast bacilli stain
-
C.
Culture on blood agar
-
D.
PCR
Solution
The acid-fast bacilli stain is used to identify Mycobacterium tuberculosis due to its unique cell wall properties.
Correct Answer:
B
— Acid-fast bacilli stain
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