Botany MCQs - Everyday Science Practice | PakExamPoint

Practise Botany MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.

Botany MCQs and revision practice

Study Botany through multiple-choice questions in Everyday Science. This subtopic contains 333 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

Use these Botany MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.

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Botany: questions and answer review

Try each question before opening its answer. Record the concept behind each mistake and revisit it during your next practice session.

31. Which substance maintains the fluidity and rigidity of the cell membrane?

کون سا مادہ سیل ممبرینکی لچک اور مضبوطی کو برقرار رکھتا ہے؟

Check answer and explanation

Answer: Cholesterol

Explanation The cell membrane is made of a phospholipid bilayer. Cholesterol is embedded between phospholipids. It regulates membrane fluidit y at different temperatures. It prevents the membrane from becoming too rigid in cold conditions. It also prevents excessive fluidity in high temperature, maintaining stability. Last updated question 17-02-2026

32. Function of Xylem in plants is to transport ______?

پودوں میں زائلم کا کام ______ لے جانا ہے؟

Check answer and explanation

Answer: Water and salts to leaves from roots

Explanation Xylem transports water and dissolved mineral salts upward from the roots to the leaves. It plays a key role in plant hydration and nutrient distribution for photosynthesis.

33. Which is the first plant response against stress?

تناؤ کے خلاف پلانٹ کا پہلا ردعمل کون سا ہے؟

Check answer and explanation

Answer: Stomatal closure

Explanation Stomatal closure is the first response in plants to stress , such as drought or high temperatures , to minimize water loss . It helps reduce transpiration and maintain water balance under unfavorable conditions.

34. Which one of the following is a fruit?

مندرجہ ذیل میں سے کون سا پھل ہے؟

Check answer and explanation

Answer: Lady’s Finger

Explanation Lady’s Finger (Okra) is a fruit . Because it develops from the ovary of a flower. It contains seeds . Potato, Radish, and Ginger are modified stems or roots, not true fruits.

35. The most common method of entry of pollen tube into the ovule is called _____?

بیضوی میں جرگ ٹیوب کے داخلے کا سب سے عام طریقہ _____ کہا جاتا ہے؟

Check answer and explanation

Answer: Porogamy

Explanation Porogamy is the most common method where the pollen tube enters the ovule through the micropyle . This ensures direct fertilization by delivering male gametes to the embryo sac.

36. Hummingbird temporary inactivity to save energy is called?

ہمنگ برڈ کی عارضی غیر فعالیت تاکہ توانائی بچائی جا سکے، کیا کہلاتی ہے؟

Check answer and explanation

Answer: Torpor

Explanation Torpor is a short-term state of reduced metabolic activity. Hummingbirds use it to conserve energy at night. Their body temperature drops significantly. It helps them survive food scarcity. It is different from long-term hibernation. Last updated question 17-02-2026

37. In grain seeds, the number of cotyledons is ______?

اناج کے بیجوں میں ، کوٹیلڈنز کی تعداد ______ ہے؟

Check answer and explanation

Answer: 2

Explanation Grain seeds , such as wheat and maize , belong to monocots , which have one cotyledon. But dicot plants (like beans) have two cotyledons . Since grain seeds can refer to dicots as well, the correct general answer is 2 .

38. In root modules of legumes, leg-haemoglobin is important because it ____?

لیموں کے جڑ نوڈولس میں ، لیگیموگلوبن اہم ہے کیونکہ یہ ____؟

Check answer and explanation

Answer: Acts as an oxygen scavenger

Explanation Leg-haemoglobin binds to oxygen, preventing it from inhibiting nitrogenase, the enzyme responsible for nitrogen fixation. This helps maintain the low oxygen conditions required for nitrogen-fixing bacteria to function efficiently.

39. Sorghum inflorescence is called ______?

سورگھم کے پھولوں کے جھرمٹ کو کیا کہتے ہیں؟

Check answer and explanation

Answer: Panicle

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

40. Which nutrient element is more available at acidic soil as compare to neutral organic soil?

غیر جانبدار نامیاتی مٹی کے مقابلے میں تیزابیت والی مٹی میں کون سا غذائی اجزاء عنصر زیادہ دستیاب ہے؟

Check answer and explanation

Answer: Boron

Explanation Boron is more available in acidic soils but becomes less available in neutral to alkaline soils. In contrast, elements like calcium and molybdenum are more available in neutral or alkaline conditions.

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