Biology Class 9th MCQs MCQs - General Science Practice | PakExamPoint

Practise Biology Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.

Biology Class 9th MCQs MCQs and revision practice

Study Biology Class 9th MCQs through multiple-choice questions in General Science. This subtopic contains 178 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

Use these Biology Class 9th MCQs 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.

Continue your revision with related topics: Biology Class 10th MCQs MCQs, Chemistry Class 10th MCQs MCQs, Chemistry Class 9th MCQs MCQs, General Science Class 10 MCQs MCQs, General Science Class 4 MCQs MCQs, General Science Class 5 MCQs MCQs, General Science Class 6 MCQs MCQs, General Science Class 7 MCQs MCQs.

Return to all General Science topics to choose your next area of study. Read the MCQ study guide to plan your revision, or try a General Science practice quiz.

Biology Class 9th MCQs: 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. Field of research that examines mathematical representations of biological system called _____?

تحقیق کا میدان جو حیاتیاتی نظام کی ریاضیاتی نمائندگیوں کی جانچ کرتا ہے جسے _____ کہا جاتا ہے؟

Check answer and explanation

Answer: Mathematical biology

Explanation Mathematical biology , also known as biomathematics. It is an interdisciplinary field that applies mathematical techniques and tools to understand and analyze biological systems, processes, and phenomena. It involves developing mathematical models , simulations, and algorithms to describe and predict biological behavior, dynamics, and evolution.

32. Diffusion is a _____ process, which does not require energy input.

بازی ایک _____ عمل ہے، جس کے لیے توانائی کے ان پٹ کی ضرورت نہیں ہوتی ہے۔

Check answer and explanation

Answer: Passive

Explanation Diffusion is a passive process, meaning it does not require energy input. In diffusion, particles move from an area of higher concentration to an area of lower concentration until they are evenly distributed, without the use of energy.

33. Relaxation of heart muscles and allowing the chambers to fill with blood called?

دل کے پٹھوں کو آرام دینا اور چیمبروں کو خون سے بھرنے دینا ____ کہلاتا ہے؟

Check answer and explanation

Answer: Diastole

Explanation Diastole is the phase of the cardiac cycle where the heart muscle relaxes. It allowing the chambers to fill with blood.

34. In flowering plants xylem is made up of ____ types of tissues.

پھولدار پودوں میں زائلم ____ قسم کے ٹشوز سے بنا ہوتا ہے۔

Check answer and explanation

Answer: 4

Explanation In flowering plants , xylem is composed of four types of tissues: Tracheids Vessel elements Xylem fibers Xylem parenchyma

35. Conversion of free energy into different forms by living organisms is called?

جانداروں کے ذریعہ آزاد توانائی کو مختلف شکلوں میں تبدیل کرنا ____ کہلاتا ہے؟

Check answer and explanation

Answer: Bioenergetics

Explanation Bioenergetics is the process by which living organisms convert free energy into different forms. Such as light energy to chemical energy in photosynthesis, or chemical energy from nutrients to kinetic energy in cellular respiration. This conversion is essential for maintaining life and supporting various cellular activities.

36. Each mole of glucose produce maximum energy i.e ______?

گلوکوز کا ہر تل زیادہ سے زیادہ توانائی پیدا کرتا ہے یعنی ______؟

Check answer and explanation

Answer: 2827 Kj

Explanation One mole of glucose (180g) produces a maximum of 2827 kJ (kilojoules) of energy through cellular respiration. This energy is released as ATP (adenosine triphosphate) and is used to power various cellular activities.

37. Dead cells of xylem vessels arranged vertically have empty space inside called?

عمودی طور پر ترتیب دیئے گئے زائلم برتنوں کے مردہ خلیات کے اندر خالی جگہ ہوتی ہے؟

Check answer and explanation

Answer: Lumen

Explanation Lumen refers to the empty space inside dead cells of xylem vessels, which are arranged vertically and form the vascular tissue in plants. The lumen provides a pathway for water and mineral transport from roots to leaves.

38. Enzyme changes in pH can cause enzymes to ______?

پی ایچ میں انزائم کی تبدیلیاں انزائمز کو ______ کا سبب بن سکتی ہیں؟

Check answer and explanation

Answer: Denature

Explanation Changes in pH can cause enzymes to denature, losing their native structure and activity. This is because enzymes are highly specific to their optimal pH range. Changes in pH can disrupt the delicate balance of charges and hydrogen bonds that maintain the enzyme's active structure.

39. Choose the incorrect statement regarding meiosis?

مییووسس کے بارے میں غلط بیان کا انتخاب کریں؟

Check answer and explanation

Answer: Production of new somatic cells from germ cells

Explanation Meiosis is a type of cell division that occurs in germ cells (reproductive cells) to produce gametes (sperm or egg cells). It does not produce new somatic cells (non-reproductive cells).

40. Part of agriculture for the development of new varieties of plant, and their fruit is _____?

پودوں کی نئی اقسام کی نشوونما کے لیے زراعت کا حصہ، اور ان کا پھل _____ ہے؟

Check answer and explanation

Answer: Horticulture

Explanation Horticulture is the branch of agriculture concerned with the cultivation of fruits, vegetables, nuts, seeds, and ornamental plants. It involves the development of new varieties of plants, their breeding. The improvement of their yield, quality, and resistance to diseases.

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