BIOLOGY
get here top 1000 Biology MCQs
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
پودوں کے خلیے میں موجود اور جانوروں کے خلیے میں غیر موجود ساخت کون سی ہے؟
- Mitochondria
- Cell wall
- Plasma membrane
- Ribosome
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Explanation
- The cell wall is found only in plant cells (not in animal cells).
- It is made mainly of cellulose.
- It provides shape, strength, and protection to plant cells.
- Animal cells only have a plasma membrane, not a cell wall.
Last verified on 12-04-2024
ایمیلیز ان میں سے کس پر عمل کرتا ہے؟
- Nucleic Acid
- Polysaccharides
- Lipids
- None of these
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Explanation
- Amylase is a carbohydrase enzyme.
- It specifically breaks down starch (a polysaccharide) into simpler sugars.
- It is present in saliva (salivary amylase) and pancreatic juice.
Last verified on 12-04-2026
ایک واحد خلوی جاندار جس کے پاس حقیقی نیوکلیس ہو اور جو اپنا خوراک خود بناتا ہو، زیادہ امکان ہے کہ وہ کیا ہوگا؟
- Plant
- Heterotroph
- Protist
- None of these
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Explanation
- Protists are unicellular eukaryotic organisms (have true nucleus).
- Some protists like Euglena can make their own food using chlorophyll.
- They show both plant-like (autotrophic) and animal-like (heterotrophic) behavior.
Last verified on 12-04-2026
ایک جاندار اے دوسرے جاندار بی کو خوراک فراہم کرتا ہے اور بدلے میں پناہ حاصل کرتا ہے۔ اس ماحولیاتی تعلق کو کیا کہتے ہیں؟
- Mutualism
- Commensalism
- Parasitism
- None of these
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Explanation
- Mutualism is a relationship where both organisms benefit.
- Here, A gives food and B gives shelter, so both gain advantages.
- Example: ants and aphids, clownfish and sea anemone.
Last verified on 12-04-2026
انیروبک تنفس کس چیز کی غیر موجودگی میں ہوتا ہے؟
- Carbon dioxide
- Nitrogen
- Oxygen
- None of these
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Explanation
- Respiration is the process of releasing energy from food.
- It can occur in two forms: aerobic and anaerobic respiration.
- Anaerobic respiration happens without oxygen.
- It is common in yeast, bacteria, and muscle cells during heavy exercise.
- It produces less energy compared to aerobic respiration.
Last verified on 12-04-2026
انسانی جسم میں انسولین کہاں پائی جاتی ہے؟
- Heart
- Brain
- Pancreas
- Liver
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Explanation
- Insulin is produced in the pancreas,
- Agland located in the upper abdomen,
- Situated behind the stomach and in front of the spine.
- Produced by specialized cells known as beta cells
- Regulate blood glucose (sugar) levels,
- Allow glucose to enter cells for energy.
Last updated 12 april 2026
مناسب درجہ حرارت سے زیادہ درجہ حرارت انزائم کی کارکردگی کیوں کم کر دیتا ہے؟
- It accelerates substrate product complex formation
- It increases substrate bonding
- It alters the enzyme's structure
- None of these
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Explanation
- Enzymes work best at an optimum temperature.
- Temperature changes affect enzyme activity and shape.
- High temperature can damage enzyme structure.
- This reduces the enzyme’s ability to function properly.
- Enzymes are sensitive biological catalysts.
Last verified on 11-04-2026
پیشاب کے اخراج کا درست ترتیب کیا ہے؟
- Kidney → Urethra → Urinary Bladder → Ureter
- Kidney → Ureter → Urinary Bladder → Urethra
- Kidney → Urinary Bladder → Ureter → Urethra
- None of these
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Explanation
The human urinary system functions as a sequence of organs that filter blood and eliminate waste in a specific order:
- Kidney: The starting point where blood is filtered and urine is formed.
- Ureter: Narrow, tubular structures that transport the formed urine from the kidneys down to the bladder.
- Urinary Bladder: A muscular sac in the pelvic cavity that acts as a temporary storage reservoir for urine.
- Urethra: The final canal-shaped tube through which urine is expelled from the body to the exterior.
Last verified on 11-04-2026
صحرا کے ماحولیاتی نظام میں ثانوی صارفین (سانپوں) کی آبادی کم ہو جائے تو اس کا سب سے ممکنہ نتیجہ کیا ہوگا؟
- Termination of the population of primary consumers
- Increase in the population of primary consumers
- Decrease in the population of primary consumers
- None of these
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Explanation
- Snakes normally control the population of primary consumers.
- When snakes decrease, predation pressure reduces.
- As a result, primary consumers (like rodents, insects) increase.
- This can disturb ecological balance in the desert ecosystem.
Last verified on 11-04-2026
ایک نوزائیدہ بچے میں ڈاؤن سنڈروم کی رپورٹ میں گیمیٹس کی تشکیل میں غلطی ظاہر ہوئی ہے۔ یہ حالت کس وجہ سے پیدا ہوتی ہے؟
- Alternation in cell division checkpoints
- Improper segregation of homologous chromosomes
- Crossing over between non-sister chromatids
- None of these
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Explanation
- This condition is caused by nondisjunction during meiosis.
- Homologous chromosomes fail to separate properly in meiosis I (or sister chromatids in meiosis II).
- As a result, one gamete gets an extra chromosome.
- After fertilization, this leads to trisomy 21 (Down syndrome).
Last verified on 11-04-2026