BIOLOGY
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
فوٹو ریسپریشن زیادہ تر کس قسم کے پودوں میں دیکھی جاتی ہے؟
- CAM plants
- C4 plants
- C3 plants
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Photorespiration is a process where Rubisco enzyme reacts with O₂ instead of CO₂, reducing photosynthetic efficiency.
- It occurs mainly in C3 plants like wheat, rice, and soybean.
- Leads to loss of energy and fixed carbon in plants.
- More common in hot and dry conditions.
Last verified on 12-02-2026
پودے مٹی سے نائٹروجن کس شکل میں لیتے ہیں؟
- Nitrate
- Ammonium
- Both A and B
- None of these
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Explanation
- Plants need nitrogen for protein and chlorophyll synthesis.
- Nitrogen in soil is absorbed mainly as nitrate (NO₃⁻) and ammonium (NH₄⁺) ions.
- Soil bacteria help convert organic nitrogen into these forms.
- Essential for healthy plant growth and higher crop yield.
- Nitrogen deficiency causes yellowing of leaves.
Last verified on 12-02-2026
سی فور پودوں میں سب سے پہلی کاربوکسیلیشن اینزائم کون سی ہے؟
- Carbon anhydrase
- Phosphenol pyruvate carboxylase
- Rubisco activase
- None of these
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Explanation
- C4 plants (e.g., maize, sugarcane) perform C4 photosynthesis to minimize photorespiration.
- The first enzyme to fix CO₂ is PEP carboxylase, forming a 4-carbon compound.
- This is different from C3 plants, where Rubisco fixes CO₂ first.
- PEP carboxylase has high affinity for CO₂ and does not react with O₂.
- Important for efficient photosynthesis in hot and dry climates.
Last verified on 12-02-2026
سورگھم کے پھولوں کے جھرمٹ کو کیا کہتے ہیں؟
- Spike
- Panicle
- Flower
- None of these
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Explanation
- Sorghum is a cereal crop grown for food, fodder, and biofuel.
- Its flowers are arranged in a panicle inflorescence, a branched cluster of flowers.
- Panicles help in efficient pollination and seed formation.
- Commonly grown in arid and semi-arid regions.
- Important for human consumption and livestock feed.
Last verified on 12-02-2026
ٹِکا بیماری سب سے بڑا خطرہ کس فصل کے لیے ہے؟
- Apple
- Sorghum
- Groundnut
- None of these
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Explanation
- Tikka disease is a fungal disease affecting groundnut (peanut) crops.
- Caused by Cercospora arachidicola.
- Leads to leaf spots, defoliation, and reduced yield.
- Major concern in tropical and subtropical regions.
- Early detection and resistant varieties help control it.
Last verified on 12-02-2026
کیڑوں کے پاس کتنے پیر اور پر ہوتے ہیں؟
- 4 legs and 2 wings
- 8 legs and 4 wing
- 6 legs and 4 wings
- None of these
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Explanation
- Insects are part of the class Insecta in the animal kingdom.
- They have 3 body parts: head, thorax, and abdomen.
- Most insects have 6 legs and 4 wings.
- They are the largest group of animals on Earth.
- Examples: Butterfly, Bee, Grasshopper, Dragonfly.
Last verified on 12-02-2026
یہ عمل رائزوبیم بیکٹیریا کے ذریعے انجام پاتا ہے؟
- Nitrogen fixation
- Ammonification
- Denitrification
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Rhizobium bacteria live in root nodules of leguminous plants (e.g., peas, beans).
- They convert atmospheric nitrogen (N₂) into ammonia (NH₃), a usable form for plants.
- This process is called nitrogen fixation.
- It enriches soil fertility naturally.
- Essential for plant growth and agriculture.
Last verified on 12-01-2026
جینیات میں کسی جاندار کی صفت کا ظاہری اظہار کیا کہلاتا ہے؟
- Genotype
- Dominant
- Phenotype
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Phenotype means the visible appearance or expressed traits of an organism.
- It includes features like height, eye color, and shape.
- It is the result of genotype + environment.
- What we can observe directly is phenotype.
- Used widely in genetics studies.
Last verified on 12-02-2026
مندرجہ ذیل میں سے کون سا پروٹین ہے؟
- Sugar
- Butter
- Meat
- All of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Protein foods come from both animal and plant sources.
- Animal sources include seafood, meat, poultry, and eggs.
- Plant sources include beans, peas, lentils, nuts, seeds, and soy products.
- These foods help in body growth and tissue repair.
- Protein is an essential nutrient.
Last verified on 12-02-2026
درج ذیل میں سے کون سا پھل نہیں ہے؟
- Tomato
- Potato
- Pumpkin
- Melon
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Botanically, a fruit develops from the flower and contains seeds.
- Tomato, pumpkin, and melon grow from flowers and have seeds → fruits.
- Potato is an underground stem (tuber), not a fruit.
- It is classified as a vegetable.
- Used mainly as a root/tuber crop.
Last verified on 12-02-2026
