BIOLOGY
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
کھانے کا کون سا جز جسم کو کمی کی بیماریوں سے بچانے اور جسم کے معمول کے افعال کو برقرار رکھنے سے سب سے زیادہ براہِ راست متعلق ہے؟
- Carbohydrates
- Vitamins
- Fats
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Vitamins act as protective nutrients in the body.
- They help regulate metabolism, immunity, and normal body functions.
- Their deficiency leads to specific diseases like scurvy (Vitamin C) and rickets (Vitamin D).
Last verified on 25-05-2026
زمین کے اندر موجود پانی فراہم کرنے کا ذریعہ کون سا ہے؟
- Rivers
- Dams
- Tube wells
- None of these
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Explanation
- Tube wells extract water from underground layers called aquifers.
- They are widely used for irrigation and drinking water.
- Water is pumped to the surface using electric or diesel pumps.
- Tube wells are important in agricultural areas.
- They help where surface water is limited.
Last verified on 24-05-2026
خلیے کا کون سا حصہ پروٹین بنانے کا ذمہ دار ہے؟
- Nucleus
- Ribosomes
- Mitochondria
- Golgi apparatus
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Explanation
- Ribosomes are the sites of protein synthesis in the cell.
- They read genetic instructions (mRNA) and assemble amino acids into proteins.
- They can be found free in the cytoplasm or attached to rough ER.
- They are made of RNA and proteins.
- They are present in both prokaryotic and eukaryotic cells.
Last verified on 06-05-2026
صحت مند جلد کے لیے کون سا وٹامن اہم ہے؟
- Vitamin C
- Vitamin A
- Vitamin B
- None of these
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Explanation
- Vitamin A is essential for healthy skin and tissues.
- It helps in growth and repair of skin cells.
- It maintains epithelial tissues in good condition.
- Deficiency can cause dry and rough skin problems.
- It is also important for vision and immunity.
Last verified on 24-05-2026
پینے کے لیے بنیادی طور پر کون سا پانی استعمال کیا جاتا ہے؟
- Industrial water
- Groundwater
- Sea water
- None of these
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Explanation
- Groundwater is the main safe source of drinking water.
- It is found beneath the Earth’s surface in aquifers.
- It is naturally filtered through soil and rocks.
- It is commonly used in wells, hand pumps, and tube wells.
Last verified on 24-05-2026
سیل میں توانائی پیدا کرنے کا ذمہ دار کون سا آرگنیل ہے؟
- Ribosome
- Nucleus
- Mitochondria
- None of these
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Explanation
- Mitochondria are known as the “powerhouse of the cell.”
- They produce energy in the form of ATP.
- This energy is used for all cellular activities.
- Found in almost all eukaryotic cells.
Last verified on 24-05-2026
جسم کے درجہ حرارت کو برقرار رکھنے اور جسم کو محفوظ رکھنے کے لیے کون سا غذائی جز ضروری ہے؟
- Vitamins
- Fats
- Carbohydrates
- None of these
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Explanation
- Fats are essential nutrients that store energy in the body.
- They help in maintaining body temperature by providing insulation.
- Fat layer under skin reduces heat loss.
- They also protect internal organs from shock.
Last verified on 24-05-2026
کون سا حصہ مادّوں کے اندر اور باہر جانے کو کنٹرول کرنے والی رکاوٹ کا کام کرتا ہے؟
- Nucleus
- Cell membrane
- Cytoplasm
- None of these
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Explanation
- The cell membrane is a thin protective layer surrounding the cell.
- It controls the movement of substances into and out of the cell.
- It is also called the plasma membrane.
- It is selectively permeable.
Last verified on 23-05-2026
درج ذیل میں سے کون سی غذا جسم کی نشوونما اور بافتوں/پٹھوں کی مرمت میں مدد دیتی ہے؟
- Carbohydrates
- Vitamins
- Proteins
- Minerals
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Explanation
- Proteins are called body-building foods.
- They help in growth, repair of tissues, and muscle development.
- They are essential for maintaining and rebuilding body cells.
- They are made of amino acids, the building blocks of the body.
- Deficiency of protein can lead to weak muscles and poor growth.
Last verified on 06-05-2026
ایک بھیڑیا ایک ماحولیاتی نظام میں داخل ہوتا ہے، جس سے سبزی خور کی تعداد کم ہو جاتی ہے اور پودوں دوبارہ بڑھنے لگتی ہے۔ یہ کس چیز کی مثال ہے؟
- Competition
- Symbiosis
- Trophic cascade
- None of these
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Explanation
- A trophic cascade is an ecological process where changes at the top of the food chain affect multiple lower levels.
- In this case, the wolf (top predator) reduces herbivore population.
- With fewer herbivores, plants and vegetation recover and grow.
- It shows how predators control ecosystem balance.
- It is an example of top-down regulation in ecology.
Last verified on 21-05-2026