Q. Which factor does NOT significantly affect fermentation rate?
A.
Temperature
B.
pH
C.
Oxygen concentration
D.
Color of the substrate
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Solution
The color of the substrate does not significantly affect fermentation rate, while temperature, pH, and oxygen concentration do.
Correct Answer:
D
— Color of the substrate
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Q. Which food is a common source of dietary fiber?
A.
White bread
B.
Brown rice
C.
Candy
D.
Butter
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Solution
Brown rice is a whole grain that is high in dietary fiber, aiding digestion.
Correct Answer:
B
— Brown rice
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Q. Which food is a good source of omega-3 fatty acids?
A.
Chicken
B.
Salmon
C.
Rice
D.
Potatoes
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Solution
Salmon is rich in omega-3 fatty acids, which are beneficial for heart health.
Correct Answer:
B
— Salmon
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Q. Which food is most likely to cause a Clostridium perfringens infection?
A.
Raw eggs
B.
Cooked meats
C.
Unpasteurized milk
D.
Fresh fruits
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Solution
Cooked meats, especially when kept warm for long periods, are commonly associated with Clostridium perfringens.
Correct Answer:
B
— Cooked meats
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Q. Which form of anthrax is characterized by the inhalation of spores?
A.
Cutaneous anthrax
B.
Gastrointestinal anthrax
C.
Inhalation anthrax
D.
Injection anthrax
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Solution
Inhalation anthrax occurs when spores are inhaled, leading to severe respiratory illness.
Correct Answer:
C
— Inhalation anthrax
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Q. Which fruit is known for its anti-inflammatory properties?
A.
Pineapple
B.
Mango
C.
Apple
D.
Peach
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Solution
Pineapple contains bromelain, an enzyme that has anti-inflammatory properties.
Correct Answer:
A
— Pineapple
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Q. Which fruit is known for its high potassium content?
A.
Apple
B.
Banana
C.
Grapes
D.
Strawberry
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Solution
Bananas are particularly high in potassium, which is important for heart health and muscle function.
Correct Answer:
B
— Banana
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Q. Which gas law explains the relationship between the volume and pressure of gases in the lungs?
A.
Boyle's Law
B.
Charles's Law
C.
Dalton's Law
D.
Henry's Law
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Solution
Boyle's Law states that the pressure of a gas is inversely proportional to its volume, which is fundamental to the mechanics of breathing.
Correct Answer:
A
— Boyle's Law
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Q. Which gene transfer method uses Agrobacterium tumefaciens?
A.
Biolistics
B.
Agrobacterium-mediated transformation
C.
Electroporation
D.
Microinjection
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Solution
Agrobacterium-mediated transformation is a method that utilizes the natural ability of Agrobacterium tumefaciens to transfer DNA to plant cells.
Correct Answer:
B
— Agrobacterium-mediated transformation
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Q. Which genus of Actinomycetes is known for producing antibiotics?
A.
Streptomyces
B.
Nocardia
C.
Corynebacterium
D.
Bifidobacterium
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Solution
The genus Streptomyces is well-known for its ability to produce a variety of antibiotics.
Correct Answer:
A
— Streptomyces
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Q. Which glial cell type is responsible for the formation of the blood-brain barrier?
A.
Astrocytes
B.
Microglia
C.
Oligodendrocytes
D.
Ependymal cells
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Solution
Astrocytes are responsible for the formation and maintenance of the blood-brain barrier, regulating the passage of substances into the brain.
Correct Answer:
A
— Astrocytes
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Q. Which group of microorganisms is most abundant in soil?
A.
Fungi
B.
Bacteria
C.
Viruses
D.
Protozoa
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Solution
Bacteria are the most abundant microorganisms in soil, playing crucial roles in nutrient cycling.
Correct Answer:
B
— Bacteria
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Q. Which hepatitis virus is known for having a high mutation rate?
A.
Hepatitis A
B.
Hepatitis B
C.
Hepatitis C
D.
Hepatitis D
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Solution
Hepatitis C virus is known for having a high mutation rate, complicating treatment and vaccine development.
Correct Answer:
C
— Hepatitis C
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Q. Which hepatitis virus is most commonly associated with chronic infection?
A.
Hepatitis A
B.
Hepatitis B
C.
Hepatitis C
D.
Hepatitis D
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Solution
Hepatitis C virus is most commonly associated with chronic infection, leading to long-term liver disease.
Correct Answer:
C
— Hepatitis C
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Q. Which hepatitis virus is primarily spread through contaminated blood?
A.
Hepatitis A
B.
Hepatitis B
C.
Hepatitis C
D.
Both B and C
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Solution
Both Hepatitis B and C viruses are primarily spread through contaminated blood.
Correct Answer:
D
— Both B and C
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Q. Which hepatitis virus requires the presence of Hepatitis B virus to replicate?
A.
Hepatitis A
B.
Hepatitis B
C.
Hepatitis C
D.
Hepatitis D
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Solution
Hepatitis D virus requires the presence of Hepatitis B virus to replicate and cause infection.
Correct Answer:
D
— Hepatitis D
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Q. Which histopathological feature is characteristic of granulomatous inflammation?
A.
Necrosis
B.
Lymphocytic infiltration
C.
Epithelioid macrophages
D.
Fibrosis
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Solution
Granulomatous inflammation is characterized by the presence of epithelioid macrophages, which form granulomas.
Correct Answer:
C
— Epithelioid macrophages
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Q. Which histopathological feature is characteristic of necrosis?
A.
Apoptotic bodies
B.
Karyolysis
C.
Cell shrinkage
D.
Nuclear fragmentation
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Solution
Karyolysis, the dissolution of the cell nucleus, is a hallmark of necrosis, distinguishing it from apoptosis.
Correct Answer:
B
— Karyolysis
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Q. Which hormone is involved in the regulation of circadian rhythms?
A.
Melatonin
B.
Cortisol
C.
Insulin
D.
Thyroxine
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Solution
Melatonin is a hormone produced by the pineal gland that helps regulate circadian rhythms and sleep-wake cycles.
Correct Answer:
A
— Melatonin
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Q. Which hormone is primarily involved in the fight-or-flight response?
A.
Cortisol
B.
Insulin
C.
Epinephrine
D.
Testosterone
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Solution
Epinephrine, also known as adrenaline, is released from the adrenal medulla and is crucial for the fight-or-flight response, increasing heart rate and energy availability.
Correct Answer:
C
— Epinephrine
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Q. Which hormone is primarily responsible for increasing blood pressure during stress?
A.
Insulin
B.
Epinephrine
C.
Aldosterone
D.
Cortisol
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Solution
Epinephrine is released during stress and increases heart rate and blood pressure by enhancing cardiac output.
Correct Answer:
B
— Epinephrine
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Q. Which hormone is primarily responsible for lowering blood glucose levels?
A.
Glucagon
B.
Insulin
C.
Cortisol
D.
Adrenaline
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Solution
Insulin is the hormone that lowers blood glucose levels.
Correct Answer:
B
— Insulin
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Q. Which hormone is primarily responsible for regulating blood glucose levels?
A.
Insulin
B.
Glucagon
C.
Cortisol
D.
Adrenaline
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Solution
Insulin is the hormone that lowers blood glucose levels by facilitating the uptake of glucose into cells.
Correct Answer:
A
— Insulin
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Q. Which hormone is primarily responsible for regulating blood pressure?
A.
Insulin
B.
Epinephrine
C.
Aldosterone
D.
Thyroxine
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Solution
Aldosterone plays a key role in regulating blood pressure by promoting sodium retention and increasing blood volume.
Correct Answer:
C
— Aldosterone
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Q. Which hormone is primarily responsible for regulating the body's metabolism?
A.
Cortisol
B.
Thyroxine
C.
Insulin
D.
Adrenaline
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Solution
Thyroxine, produced by the thyroid gland, plays a crucial role in regulating metabolism by increasing the metabolic rate of cells.
Correct Answer:
B
— Thyroxine
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Q. Which hormone is primarily responsible for regulating water reabsorption in the kidneys?
A.
Aldosterone
B.
Antidiuretic hormone (ADH)
C.
Natriuretic peptide
D.
Renin
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Solution
Antidiuretic hormone (ADH) increases water reabsorption in the kidneys, helping to regulate body fluid balance.
Correct Answer:
B
— Antidiuretic hormone (ADH)
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Q. Which hormone is primarily responsible for stimulating gastric acid secretion?
A.
Insulin
B.
Gastrin
C.
Secretin
D.
Cholecystokinin
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Solution
Gastrin is the hormone that stimulates the secretion of gastric acid from the parietal cells in the stomach.
Correct Answer:
B
— Gastrin
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Q. Which hormone is primarily responsible for the regulation of calcium levels in the blood?
A.
Calcitonin
B.
Parathyroid hormone
C.
Insulin
D.
Cortisol
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Solution
Parathyroid hormone (PTH) increases blood calcium levels by promoting the release of calcium from bones, reabsorption in the kidneys, and absorption in the intestines.
Correct Answer:
B
— Parathyroid hormone
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Q. Which hormone is primarily responsible for the regulation of water balance in the body?
A.
Adrenaline
B.
Cortisol
C.
Antidiuretic hormone (ADH)
D.
Insulin
Show solution
Solution
Antidiuretic hormone (ADH) is primarily responsible for regulating water balance in the body by controlling the amount of water reabsorbed by the kidneys.
Correct Answer:
C
— Antidiuretic hormone (ADH)
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Q. Which hormone is released from the posterior pituitary gland and regulates water balance?
A.
Oxytocin
B.
Vasopressin
C.
Prolactin
D.
Growth hormone
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Solution
Vasopressin, also known as antidiuretic hormone (ADH), is released from the posterior pituitary and helps regulate water balance by promoting water reabsorption in the kidneys.
Correct Answer:
B
— Vasopressin
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