Biology MCQs chapter#1

 

                 

        

                                           Biology MCQs chapter#1

Sure, here are 20 multiple-choice questions related to the 9th-grade biology chapter "Introduction to Biology" along with their answers:

1:What is the scientific study of living organisms called?

a) Zoology

b) Botany

c) Biology

d) Ecology

Answer: c) Biology

2:Which of the following is NOT a characteristic of living organisms?

a) Growth and development

b) Ability to reproduce

c) Consciousness and intelligence

d) Inorganic composition

Answer: d) Inorganic composition

3:The basic unit of life is:

a) Tissue

b) Organ

c) Cell

d) Organism

Answer: c) Cell

4:What is the process by which living organisms maintain a stable internal environment?

a) Reproduction

b) Growth

c) Homeostasis

d) Respiration

Answer: c) Homeostasis

5:The process of converting light energy into chemical energy in plants is called:

a) Respiration

b) Photosynthesis

c) Digestion

d) Transpiration

Answer: b) Photosynthesis

6:Which organelle is known as the "powerhouse of the cell" and is responsible for energy production?

a) Nucleus

b) Golgi apparatus

c) Mitochondria

d) Endoplasmic reticulum

Answer: c) Mitochondria

7:The genetic material of a cell is found in which part of the cell?

a) Nucleus

b) Chloroplast

c) Vacuole

d) Cell membrane

Answer: a) Nucleus

8:What is the green pigment found in plant cells that is responsible for capturing light energy for photosynthesis?

a) Melanin

b) Hemoglobin

c) Chlorophyll

d) Carotene

Answer: c) Chlorophyll 

9:Which scientist is known as the "Father of Genetics" for his work on pea plants?

a) Charles Darwin

b) Gregor Mendel

c) Louis Pasteur

d) Alexander Fleming

Answer: b) Gregor Mendel

10:The process of conversion of food into soluble substances that can be absorbed by cells is called:

a) Digestion

b) Respiration

c) Excretion

d) Secretion

Answer: a) Digestion

11:Which part of the plant transports water and minerals from the roots to the rest of the plant?

a) Stem

b) Leaves

c) Roots

d) Flowers

Answer: a) Stem

12:The largest organ in the human body is:

a) Heart

b) Liver

c) Skin

d) Brain

Answer: c) Skin

13:Which of the following is a non-living disease-causing agent?

a) Bacteria

b) Virus

c) Fungus

d) Protist

Answer: b) Virus

14:What is the main function of red blood cells in the human body?

a) Carrying oxygen

b) Fighting infections

c) Transporting nutrients

d) Producing hormones

Answer: a) Carrying oxygen

15:The process of converting nitrogen gas into nitrogen compounds usable by plants is called:

a) Nitrification

b) Nitrogen fixation

c) Denitrification

d) Nitrogen assimilation

Answer: b) Nitrogen fixation

16:Which of the following is NOT a renewable resource?

a) Solar energy

b) Wind energy

c) Fossil fuels

d) Biomass

Answer: c) Fossil fuels

17:Which ecosystem is characterized by extreme cold, little precipitation, and a layer of permanently frozen subsoil?

a) Desert

b) Tundra

c) Rainforest

d) Grassland

Answer: b) Tundra

18:The process by which water vapor is released from the surface of plants is called:

a) Photosynthesis

b) Transpiration

c) Respiration

d) Evaporation

Answer: b) Transpiration

19:Which gas is responsible for causing the greenhouse effect and contributes to global warming?

a) Nitrogen

b) Oxygen

c) Carbon dioxide

d) Hydrogen

Answer: c) Carbon dioxide

20:The pH scale measures the acidity or alkalinity of a substance. What does a pH value of 7 indicate?

a) Neutral

b) Acidic

c) Basic

d) Alkaline

Answer: a) Neutral

Remember, these questions are for educational purposes and can be used to test your understanding of the chapter "Introduction to Biology." Make sure to study the concepts thoroughly to answer them correctly.