9th Class Biology Chapter 1 MCQs with Answers

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Grade 9 Biology Chapter 1 Online Quiz

By presenting 3 options to choose from, 9th Class Chapter 1 Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of 9th Class Questions and Answers and click over the correct answer.

• Test Name: 9th Class Chapter 1 Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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9th Class Biology Ch 1: Introduction to Biology

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1 / 40

What is the basic building block of proteins?

Fatty acids

Amino acids

Nucleic acids

2 / 40

What is the function of the ribosomes in a cell?

Storage of genetic material

Energy production

Protein synthesis

3 / 40

What is the process by which an organism develops from a fertilized egg?

Development

Metamorphosis

Reproduction

4 / 40

What is the purpose of the Krebs cycle in cellular respiration?

Synthesize DNA

Break down glucose

Generate energy-rich molecules

5 / 40

What is the largest organ in the human body?

Skin

Liver

Heart

6 / 40

In what organelle does cellular respiration occur?

Chloroplast

Mitochondria

Nucleus

7 / 40

Which gas do humans exhale during respiration?

Oxygen

Nitrogen

Carbon dioxide

8 / 40

Which planet is known as the Red Planet?

Mars

Jupiter

Venus

9 / 40

What is the role of white blood cells in the immune system?

Clot blood

Carry oxygen

Fight infections

10 / 40

What is the main function of the nervous system?

Circulation

Digestion

Transmit signals

11 / 40

In what phase of mitosis do the chromosomes align at the cell's equator?

Metaphase

Prophase

Anaphase

12 / 40

What is the pH scale used to measure?

Temperature

Acidity or alkalinity

Pressure

13 / 40

What is the basic unit of life?

Organ

Tissue

Cell

14 / 40

Who is known as the father of modern genetics?

Louis Pasteur

Charles Darwin

Gregor Mendel

15 / 40

What is the function of the lens in the eye?

Produce tears

Focus light

Detect color

16 / 40

What is the function of the endoplasmic reticulum in a cell?

Energy production

Protein synthesis

Lipid synthesis

17 / 40

What is the chemical symbol for gold?

Fe

Au

Ag

18 / 40

Which scientist proposed the theory of evolution by natural selection?

Charles Darwin

Alfred Russel Wallace

Gregor Mendel

19 / 40

Which gas is responsible for the blue color of the sky?

Ozone

Oxygen

Nitrogen

20 / 40

What is the name of the process by which a cell divides into two identical daughter cells?

Mitosis

Binary Fission

Meiosis

21 / 40

What molecule stores genetic information in cells?

RNA

DNA

Protein

22 / 40

What is the role of the Golgi apparatus in a cell?

Synthesize DNA

Energy production

Modify and package proteins

23 / 40

What is the primary function of the circulatory system?

Respiration

Transport nutrients and oxygen

Digestion

24 / 40

What is the powerhouse of plant cells?

Golgi apparatus

Chloroplast

Vacuole

25 / 40

What is the process by which plants lose water to the atmosphere?

Respiration

Transpiration

Evaporation

26 / 40

Which gas makes up the majority of Earth's atmosphere?

Oxygen

Carbon dioxide

Nitrogen

27 / 40

What process allows plants to make their own food?

Respiration

Photosynthesis

Fermentation

28 / 40

What is the role of hemoglobin in the blood?

Transport oxygen

Clot blood

Fight infections

29 / 40

What is the function of the mitochondria in a cell?

Storage of genetic material

Protein synthesis

Energy production

30 / 40

Which part of the flower produces pollen?

Petal

Anther

Stigma

31 / 40

What is the smallest bone in the human body?

Stapes

Tibia

Femur

32 / 40

Which organelle is the powerhouse of the cell?

Nucleus

Endoplasmic Reticulum

Mitochondria

33 / 40

What is the purpose of the scientific method?

Intuition

Guessing

Systematic investigation

34 / 40

What is the purpose of the enzyme amylase?

Digestion of starch

Breaking down fats

Synthesis of proteins

35 / 40

Which gas is responsible for the greenhouse effect?

Nitrous oxide

Methane

Carbon dioxide

36 / 40

Which gas do plants absorb during photosynthesis?

Nitrogen

Oxygen

Carbon dioxide

37 / 40

What is the chemical formula for water?

O₂

H₂O

CO₂

38 / 40

What is the largest ocean on Earth?

Atlantic Ocean

Indian Ocean

Pacific Ocean

39 / 40

What is the study of classification and naming of organisms?

Genetics

Taxonomy

Ecology

40 / 40

What is the process by which cells break down glucose to release energy?

Cellular Respiration

Photosynthesis

Fermentation

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