The microorganism that causes food poisoning from improperly canned foods is: MCQ with Answer and Explanation

The microorganism that causes food poisoning from improperly canned foods is:
A. Salmonella enterica
B. Clostridium botulinum
C. Escherichia coli
D. Staphylococcus aureus
Answer: Option B
Solution (By JKSSB Mock Tests)
Clostridium botulinum, an anaerobic spore-forming bacterium, produces a potent neurotoxin causing botulism, often from improperly canned low-acid foods. Salmonella and E. coli cause gastroenteritis from contaminated food/water, Staphylococcus aureus produces enterotoxins causing acute vomiting. Botulism can be fatal without antitoxin.

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Practice More Biology Questions

Question #1
Identify the INCORRECT statement about the human eye:
A. The optic nerve transmits impulses to the brain.
B. Rods are responsible for color vision.
C. The cornea and lens focus light onto the retina.
D. The iris controls the amount of light entering the eye.

Correct Answer: Option B


Explanation:
Cones are responsible for color vision; rods detect light intensity, important in dim light. All other statements are correct.

This question belongs to: Science Biology
Question #2
Assertion (A): Mycorrhizae are symbiotic associations between fungi and plant roots.
Reason (R): The fungus provides water and minerals to the plant and receives sugars in return.
A. Both A and R are true, but R is not the correct explanation.
B. A true, R false.
C. A false, R true.
D. Both A and R are true, and R is the correct explanation.

Correct Answer: Option D


Explanation:
Mycorrhizae enhance nutrient and water uptake for plants, and the fungus benefits from photosynthetic carbohydrates. It’s a mutualistic symbiosis. R correctly explains A.

This question belongs to: Science Biology
Question #3
The 'Hormone Cholecystokinin' (CCK) is secreted by the I cells of the duodenal mucosa in response to the presence of fats and proteins. Its primary actions include:
A. Increasing blood glucose levels
B. Inhibiting gastric emptying and stimulating the gall bladder to contract and the pancreas to secrete digestive enzymes
C. Inhibiting the release of bile
D. Stimulating gastric acid secretion

Correct Answer: Option B


Explanation:
Cholecystokinin (CCK) is a peptide hormone released by the I cells of the duodenum when acidic chyme containing fats (lipids) and partially digested proteins enters from the stomach. CCK has two major digestive actions: 1) It stimulates the gall bladder to contract, releasing stored bile into the duodenum to emulsify fats. 2) It stimulates the pancreatic acinar cells to secrete a juice rich in digestive enzymes (lipases, proteases, amylase). It also slows down gastric emptying, allowing more time for digestion in the small intestine.

This question belongs to: Science Biology