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.

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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.

141. Small portion of enzyme where substrate attach with enzyme called _____?

انزائم کا چھوٹا حصہ جہاں سبسٹریٹ انزائم کے ساتھ منسلک ہوتا ہے جسے _____ کہا جاتا ہے؟

Check answer and explanation

Answer: Active site

Explanation The active site is a small region on the surface of an enzyme where the substrate binds , allowing the enzyme to catalyze the chemical reaction. It is a highly specific region that is shaped to fit the substrate , allowing for efficient binding and catalysis.

142. Techniques for manipulation of gene to achieve desirable characters are called?

مطلوبہ کرداروں کے حصول کے لیے جین کی ہیرا پھیری کی تکنیک ____ کہلاتی ہے؟

Check answer and explanation

Answer: Biotechnology

Explanation Genetic engineering is also known as genetic modification or biotechnology. It is the process of altering an organism's genes to produce a desired trait or characteristic. This can involve the transfer of genes from one organism to another, or the alteration of existing genes within an organism.

143. Cell organelle found in animal cell and help intracellular digestion?

سیل آرگنیل جانوروں کے سیل میں پایا جاتا ہے اور انٹرا سیلولر ہاضمے میں مدد کرتا ہے؟

Check answer and explanation

Answer: Lysosome

Explanation Lysosome is the cell organelle found in animal cells that helps in intracellular digestion. It contains digestive enzymes and acids that break down cellular waste and foreign substances.

144. Stage of aerobic respiration takes place at the cristae of mitochondria called?

ایروبک سانس لینے کا مرحلہ مائٹوکونڈریا کے کرسٹے پر ہوتا ہے جسے _____ کہتے ہیں؟

Check answer and explanation

Answer: Electron transport chain

Explanation The electron transport chain (ETC) is the stage of aerobic respiration that takes place at the cristae of mitochondria. The cristae are specialized infoldings of the mitochondrial inner membrane, where the ETC complexes are embedded.

145. Sea food is an excellent source of protein because it's usually low in ______?

سمندری غذا پروٹین کا ایک بہترین ذریعہ ہے کیونکہ یہ عام طور پر ______ میں کم ہوتا ہے؟

Check answer and explanation

Answer: Fats

Explanation Seafood is an excellent source of protein because it is typically low in fats (lipids) and high in protein. Many types of seafood, such as fish and shellfish, are lean sources of protein, making them a popular choice for those looking to reduce their fat intake.

146. Deficiency of Vitamin-K cause?

وٹامن کی کی کمی کا سبب کیا ہے؟

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Answer: Anemia

Explanation Deficiency of Vitamin K causes anemia. More specifically, it leads to impaired blood clotting, which can result in excessive bleeding.

147. Sequence of changes which occurs between one cell division and the next is called?

تبدیلیوں کی ترتیب جو ایک خلیے کی تقسیم اور دوسرے خلیے کے درمیان ہوتی ہے اسے _____ کہتے ہیں؟

Check answer and explanation

Answer: Cell cycle

Explanation The cell cycle is also known as the cell division cycle. It is the sequence of changes that occurs between one cell division and the next.

148. Scientific reasoning based on “if-then” statement called?

اگر-تو بیان پر مبنی سائنسی استدلال کو _____ کہا جاتا ہے؟

Check answer and explanation

Answer: Deductive reasoning

Explanation Deductive reasoning is a type of logical reasoning that uses "if-then" statements to arrive at a conclusion. It involves making a logical deduction based on a premise. It is used in scientific reasoning to test hypotheses and predict outcomes.

149. Activity of enzymes can be enhanced by ____?

خامروں کی سرگرمی کو ____ سے بڑھایا جا سکتا ہے؟

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Answer: Activator

Explanation Activators are molecules that increase the activity of enzymes , often by binding to a specific site on the enzyme. Inhibitors are molecules that decrease the activity of enzymes , often by binding to a specific site on the enzyme.

150. Secondary wall is made up of ______?

ثانوی دیوار ______ سے بنی ہے؟

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Answer: Cellulose and lignin

Explanation The secondary cell wall , found in plant cells, is primarily composed of: Cellulose (a polysaccharide, the main component of plant cell walls) Lignin (a complex organic compound that provides strength and rigidity)

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