Q. Which of the following is a common use of algae in the food industry?
-
A.
Thickening agent
-
B.
Preservative
-
C.
Flavor enhancer
-
D.
Coloring agent
Solution
Algae, particularly carrageenan from red algae, is commonly used as a thickening agent in food products.
Correct Answer:
A
— Thickening agent
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Q. Which of the following is a common use of citric acid in food preservation?
-
A.
Enhancing flavor
-
B.
Coloring agent
-
C.
pH adjustment
-
D.
Sweetening agent
Solution
Citric acid is often used in food preservation to adjust pH, which helps inhibit microbial growth.
Correct Answer:
C
— pH adjustment
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Q. Which of the following is a common use of monoclonal antibodies in cancer treatment?
-
A.
Chemotherapy
-
B.
Radiation therapy
-
C.
Targeted therapy
-
D.
Surgery
Solution
Monoclonal antibodies are often used in targeted therapy to specifically attack cancer cells.
Correct Answer:
C
— Targeted therapy
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Q. Which of the following is a common use of pickles in cuisine?
-
A.
As a dessert
-
B.
As a condiment
-
C.
As a main dish
-
D.
As a beverage
Solution
Pickles are commonly used as a condiment to enhance the flavor of dishes.
Correct Answer:
B
— As a condiment
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Q. Which of the following is a common viral infection?
-
A.
Tuberculosis
-
B.
Influenza
-
C.
Strep throat
-
D.
Malaria
Solution
Influenza is a common viral infection that affects the respiratory system.
Correct Answer:
B
— Influenza
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Q. Which of the following is a component of a nucleotide?
-
A.
Amino acid
-
B.
Fatty acid
-
C.
Sugar
-
D.
Protein
Solution
A nucleotide is composed of a sugar, a phosphate group, and a nitrogenous base.
Correct Answer:
C
— Sugar
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Q. Which of the following is a consequence of excessive carbohydrate intake?
-
A.
Weight loss
-
B.
Increased energy levels
-
C.
Fatigue
-
D.
Weight gain
Solution
Excessive carbohydrate intake can lead to weight gain.
Correct Answer:
D
— Weight gain
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Q. Which of the following is a consequence of renal failure?
-
A.
Increased urine output
-
B.
Decreased blood urea nitrogen levels
-
C.
Fluid retention
-
D.
Increased electrolyte excretion
Solution
Fluid retention is a common consequence of renal failure due to the kidneys' inability to excrete excess fluid and waste.
Correct Answer:
C
— Fluid retention
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Q. Which of the following is a consequence of the Second Law of Thermodynamics in biological systems?
-
A.
Energy is conserved
-
B.
Entropy tends to increase
-
C.
Reactions are reversible
-
D.
Energy is created
Solution
The Second Law of Thermodynamics states that the total entropy of an isolated system can never decrease over time.
Correct Answer:
B
— Entropy tends to increase
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Q. Which of the following is a disadvantage of immobilized enzymes?
-
A.
Increased stability
-
B.
Higher operational costs
-
C.
Reduced enzyme activity
-
D.
Easier handling
Solution
A disadvantage of immobilized enzymes can be reduced enzyme activity due to steric hindrance or changes in the enzyme's conformation.
Correct Answer:
C
— Reduced enzyme activity
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Q. Which of the following is a disadvantage of using chlorine for disinfection in wastewater treatment?
-
A.
It is ineffective against all pathogens
-
B.
It can form harmful byproducts
-
C.
It is too expensive
-
D.
It requires special equipment
Solution
A disadvantage of using chlorine for disinfection is that it can form harmful byproducts, such as trihalomethanes, which are toxic.
Correct Answer:
B
— It can form harmful byproducts
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Q. Which of the following is a disadvantage of using gene guns for plant transformation?
-
A.
Low transformation efficiency
-
B.
Requires specific plant species
-
C.
Limited to monocots
-
D.
Expensive equipment
Solution
Gene guns often have low transformation efficiency compared to other methods like Agrobacterium-mediated transformation.
Correct Answer:
A
— Low transformation efficiency
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Q. Which of the following is a function of essential fatty acids?
-
A.
Energy production
-
B.
Cell membrane structure
-
C.
Hormone synthesis
-
D.
All of the above
Solution
Essential fatty acids play roles in energy production, cell membrane structure, and hormone synthesis.
Correct Answer:
D
— All of the above
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Q. Which of the following is a function of nucleotides?
-
A.
Energy storage
-
B.
Cell signaling
-
C.
Genetic information storage
-
D.
All of the above
Solution
Nucleotides serve multiple functions, including energy storage (ATP), cell signaling (cAMP), and genetic information storage (DNA and RNA).
Correct Answer:
D
— All of the above
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Q. Which of the following is a function of the endothelium in blood vessels?
-
A.
To produce red blood cells
-
B.
To regulate vascular tone
-
C.
To store nutrients
-
D.
To initiate blood clotting
Solution
The endothelium plays a crucial role in regulating vascular tone and maintaining homeostasis in the cardiovascular system.
Correct Answer:
B
— To regulate vascular tone
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Q. Which of the following is a function of the integumentary system?
-
A.
Protection
-
B.
Temperature regulation
-
C.
Sensation
-
D.
All of the above
Solution
The integumentary system serves multiple functions including protection, temperature regulation, and sensation.
Correct Answer:
D
— All of the above
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Q. Which of the following is a function of the liver?
-
A.
Detoxification of harmful substances
-
B.
Production of insulin
-
C.
Storage of oxygen
-
D.
Regulation of heart rate
Solution
The liver detoxifies harmful substances, metabolizes drugs, and produces bile, among other functions.
Correct Answer:
A
— Detoxification of harmful substances
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Q. Which of the following is a function of the muscular system?
-
A.
Protection of organs
-
B.
Production of blood cells
-
C.
Movement of the body
-
D.
Storage of fat
Solution
The muscular system is primarily responsible for the movement of the body.
Correct Answer:
C
— Movement of the body
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Q. Which of the following is a hallmark of Burkholderia pseudomallei infection?
-
A.
Chronic cough
-
B.
Abscess formation
-
C.
Hemorrhagic fever
-
D.
Meningitis
Solution
Burkholderia pseudomallei infection is often characterized by abscess formation, particularly in the lungs and other organs.
Correct Answer:
B
— Abscess formation
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Q. Which of the following is a harmful effect of certain aquatic microbes?
-
A.
Oxygen depletion
-
B.
Increased biodiversity
-
C.
Water purification
-
D.
Nutrient enrichment
Solution
Certain harmful algal blooms caused by aquatic microbes can lead to oxygen depletion in water bodies, negatively impacting aquatic life.
Correct Answer:
A
— Oxygen depletion
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Q. Which of the following is a key benefit of genetically modified crops?
-
A.
Increased pesticide use
-
B.
Higher crop yields
-
C.
Reduced nutritional value
-
D.
Longer growing seasons
Solution
Genetically modified crops are often engineered to achieve higher yields and better resistance to pests.
Correct Answer:
B
— Higher crop yields
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Q. Which of the following is a key component of synthetic seeds?
-
A.
Natural soil
-
B.
Plant tissue culture
-
C.
Chemical fertilizers
-
D.
Pesticides
Solution
Synthetic seeds are created using plant tissue culture techniques, which allow for the development of plant embryos.
Correct Answer:
B
— Plant tissue culture
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Q. Which of the following is a key component of the epidemiological triangle?
-
A.
Agent
-
B.
Treatment
-
C.
Diagnosis
-
D.
Prevention
Solution
The epidemiological triangle consists of three components: agent, host, and environment.
Correct Answer:
A
— Agent
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Q. Which of the following is a key component of the feedback mechanism in homeostasis?
-
A.
Stimulus
-
B.
Response
-
C.
Control center
-
D.
All of the above
Solution
A feedback mechanism in homeostasis includes a stimulus, a control center that processes the information, and a response that acts to restore balance.
Correct Answer:
D
— All of the above
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Q. Which of the following is a key consideration in the synthesis of therapeutic agents?
-
A.
Cost of raw materials
-
B.
Environmental impact
-
C.
Scalability of the process
-
D.
All of the above
Solution
All of these factors are crucial in the synthesis of therapeutic agents.
Correct Answer:
D
— All of the above
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Q. Which of the following is a key difference between prokaryotic and eukaryotic transcription?
-
A.
Prokaryotes have introns
-
B.
Eukaryotes require a primer
-
C.
Prokaryotic transcription occurs in the cytoplasm
-
D.
Eukaryotic transcription is faster
Solution
In prokaryotes, transcription occurs in the cytoplasm, while in eukaryotes it occurs in the nucleus.
Correct Answer:
C
— Prokaryotic transcription occurs in the cytoplasm
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Q. Which of the following is a key factor in maintaining the viability of cultured animal cells?
-
A.
Temperature control
-
B.
High oxygen levels
-
C.
Low humidity
-
D.
Excessive nutrient concentration
Solution
Temperature control is crucial for maintaining the viability of cultured animal cells, as they require specific conditions to thrive.
Correct Answer:
A
— Temperature control
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Q. Which of the following is a key factor in optimizing fermentation processes?
-
A.
Temperature control
-
B.
pH adjustment
-
C.
Nutrient supply
-
D.
All of the above
Solution
All of the above factors—temperature control, pH adjustment, and nutrient supply—are crucial for optimizing fermentation processes.
Correct Answer:
D
— All of the above
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Q. Which of the following is a key factor influencing microbial diversity in aquatic environments?
-
A.
Water temperature
-
B.
Salinity
-
C.
Nutrient availability
-
D.
All of the above
Solution
All of the listed factors—water temperature, salinity, and nutrient availability—significantly influence microbial diversity in aquatic environments.
Correct Answer:
D
— All of the above
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Q. Which of the following is a key feature of monoclonal antibodies?
-
A.
They are produced from a single clone of B cells
-
B.
They can bind to multiple antigens
-
C.
They are derived from natural immune responses
-
D.
They are always polyclonal
Solution
Monoclonal antibodies are produced from a single clone of B cells, making them specific to a single epitope.
Correct Answer:
A
— They are produced from a single clone of B cells
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