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Digestive System / Nutrition (Class 9 Biology)
(Based on KP Textbook + Dogar + KPPSC MCQs pattern)

DIGESTIVE SYSTEM / NUTRITION – CLASS 9

🔹 1. Nutrition

Nutrition is the process by which organisms:

Obtain food

Digest it

Absorb nutrients

Use them for energy and growth

🔹 2. Types of Nutrition

A. Autotrophic Nutrition

Organisms make their own food

Example: Plants

B. Heterotrophic Nutrition

Organisms depend on others for food

Example: Humans, animals

🔹 3. Human Digestive System

Main organs:

1. Mouth

2. Esophagus

3. Stomach

4. Small intestine

5. Large intestine

6. Re**um & a**s

🔹 4. Digestion

Digestion is the breakdown of complex food into simple soluble substances.

Types

Mechanical digestion → chewing

Chemical digestion → enzymes

🔹 5. Important Enzymes

Enzyme Function

Amylase Breaks starch
Pepsin Digests proteins
Lipase Digests fats

🔹 6. Absorption

Mostly occurs in small intestine

Finger-like projections = Villi

Increase surface area

🔹 7. Importance of Balanced Diet

Contains:

Carbohydrates

Proteins

Fats

Vitamins

Minerals

Water

MCQs – DIGESTIVE SYSTEM

1. Digestion begins in:

A. Stomach
B. Mouth
C. Small intestine
D. Liver

2. Amylase digests:

A. Protein
B. Fat
C. Starch
D. Vitamins

3. Pepsin works in:

A. Mouth
B. Stomach
C. Large intestine
D. Liver

4. Absorption mainly occurs in:

A. Stomach
B. Mouth
C. Small intestine
D. Large intestine

5. Finger-like projections in intestine are:

A. Alveoli
B. Nephrons
C. Villi
D. Cilia

6. Lipase digests:

A. Carbohydrates
B. Proteins
C. Fats
D. Minerals

7. Mechanical digestion includes:

A. Enzyme action
B. Chewing
C. Absorption
D. Respiration

8. Human nutrition is:

A. Autotrophic
B. Heterotrophic
C. Saprophytic
D. Parasitic

9. Organ connecting mouth to stomach:

A. Trachea
B. Esophagus
C. Re**um
D. Ureter

10. Balanced diet must contain:

A. Vitamins only
B. Proteins only
C. All nutrients
D. Water only

✔ Answer Key

1–B
2–C
3–B
4–C
5–C
6–C
7–B
8–B
9–B
10–C

🔖 Hashtags

Circulatory System (Class 9 Biology) in full KP Textbook + Dogar + KPPSC style:

❤️ CIRCULATORY SYSTEM – CLASS 9

🔹 1. Definition

The circulatory system is responsible for the transport of blood, oxygen, nutrients, hormones, and waste products throughout the body.

🔹 2. Components

1. Heart ❤️

2. Blood 🩸

3. Blood Vessels

🔹 3. Heart

Muscular organ

Pumps blood continuously

Located in chest (between lungs)

Has 4 chambers:

Right atrium

Right ventricle

Left atrium

Left ventricle

🔹 4. Blood Vessels

A. Arteries

Carry blood away from heart

Thick & elastic walls

B. Veins

Carry blood towards heart

Have valves

C. Capillaries

Very thin

Site of exchange of gases & nutrients

🔹 5. Blood Components

A. RBCs (Red Blood Cells)

Carry oxygen

Contain hemoglobin

B. WBCs (White Blood Cells)

Fight infections

C. Platelets

Help in blood clotting

D. Plasma

Liquid part of blood

🔹 6. Double Circulation

Blood passes twice through heart

Two types:

Pulmonary circulation (heart ↔ lungs)

Systemic circulation (heart ↔ body)

🔹 7. Heartbeat

Controlled by pacemaker (SA node)

Normal rate ≈ 72 beats/min

MCQs – CIRCULATORY SYSTEM

1. Circulatory system transports:

A. Food only
B. Oxygen only
C. Materials throughout body
D. Waste only

2. Human heart has:

A. 2 chambers
B. 3 chambers
C. 4 chambers
D. 5 chambers

3. Blood vessels carrying blood away from heart:

A. Veins
B. Arteries
C. Capillaries
D. Venules

4. Veins have:

A. Thick walls
B. No valves
C. Valves
D. No blood

5. RBCs contain:

A. Plasma
B. Hemoglobin
C. Platelets
D. Antibodies

6. WBCs function is:

A. Transport oxygen
B. Fight disease
C. Clot blood
D. Transport food

7. Platelets help in:

A. Respiration
B. Circulation
C. Clotting
D. Digestion

8. Exchange of materials occurs in:

A. Arteries
B. Veins
C. Capillaries
D. Heart

9. Double circulation means:

A. Blood passes once
B. Blood passes twice
C. Blood stops
D. Blood flows slowly

10. Pacemaker controls:

A. Digestion
B. Breathing
C. Heartbeat
D. Blood pressure

✔ Answer Key

1–C
2–C
3–B
4–C
5–B
6–B
7–C
8–C
9–B
10–C

🔖 Hashtags

Next Topic: Man & Environment (Class 9 Biology)
(Last chapter — according to KP Textbook + KPPSC + Dogar pattern)

MAN & ENVIRONMENT – CLASS 9

1. Ecosystem

An ecosystem is a system where living (biotic) and non-living (abiotic) components interact.

Components

Biotic → Plants, animals, microorganisms

Abiotic → Air, water, soil, temperature

2. Food Chain

A food chain shows transfer of energy from one organism to another.

Example:
Sun → Plants → Herbivores → Carnivores

3. Food Web

Interconnected food chains

More stable than a single food chain

4. Trophic Levels

Producers (plants)

Primary consumers (herbivores)

Secondary consumers (carnivores)

Decomposers (bacteria, fungi)

5. Environmental Pollution

Addition of harmful substances into environment.

Types

Air pollution

Water pollution

Land pollution

Noise pollution

6. Causes of Pollution

Industrial waste

Vehicle smoke

Deforestation

Chemicals

7. Effects of Pollution

Global warming

Diseases

Climate change

Loss of biodiversity

8. Conservation

Protection of environment and natural resources.

Methods

Plantation

Recycling

Reducing pollution

Saving water

MCQs – MAN & ENVIRONMENT

1. Interaction between living and non-living things is called:

A. Habitat
B. Ecosystem
C. Biosphere
D. Population

2. Plants are:

A. Consumers
B. Producers
C. Decomposers
D. Parasites

3. First trophic level consists of:

A. Carnivores
B. Herbivores
C. Producers
D. Decomposers

4. Food web is:

A. Single chain
B. Complex network of food chains
C. Only plants
D. Only animals

5. Organisms that break down dead matter are:

A. Producers
B. Consumers
C. Decomposers
D. Herbivores

6. Main cause of air pollution is:

A. Water
B. Trees
C. Smoke
D. Soil

7. Global warming is caused by:

A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen

8. Cutting of trees is called:

A. Plantation
B. Deforestation
C. Cultivation
D. Irrigation

9. Recycling helps to:

A. Increase pollution
B. Reduce waste
C. Destroy environment
D. Increase heat

10. Balance in ecosystem is maintained by:

A. Pollution
B. Conservation
C. Deforestation
D. Waste

Answer Key

1–B
2–B
3–C
4–B
5–C
6–C
7–B
8–B
9–B
10–B

Next Topic: Excretion (Class 9 Biology)
(According to KP Textbook + Dogar SST + KPPSC pattern)

EXCRETION – CLASS 9

1. Definition

Excretion is the process by which waste products (toxic substances) are removed from the body.

2. Excretory Products

Urea (from protein metabolism)

Carbon dioxide (from respiration)

Water & salts

3. Organs of Excretion in Humans

Kidneys → main excretory organs

Lungs → remove CO₂

Skin → removes sweat (water + salts)

4. Structure of Kidney

Each kidney contains millions of nephrons

Nephron = functional unit of kidney

5. Parts of Nephron

Bowman’s capsule

Glomerulus

Tubules

6. Urine Formation Steps

1. Filtration (in glomerulus)

2. Reabsorption (useful substances absorbed back)

3. Secretion (wastes added to urine)

7. Importance of Excretion

Removes toxic wastes

Maintains water & salt balance

Maintains internal environment

MCQs – EXCRETION

1. Excretion is the removal of:

A. Food
B. Waste products
C. Oxygen
D. Nutrients

2. Main excretory organ in humans is:

A. Heart
B. Kidney
C. Liver
D. Lungs

3. Functional unit of kidney is:

A. Neuron
B. Nephron
C. Alveoli
D. Tubule

4. Urea is produced from:

A. Carbohydrates
B. Fats
C. Proteins
D. Vitamins

5. CO₂ is removed through:

A. Skin
B. Kidneys
C. Lungs
D. Liver

6. Filtration in kidney occurs in:

A. Tubule
B. Glomerulus
C. Ureter
D. Bladder

7. Reabsorption occurs in:

A. Glomerulus
B. Tubules
C. Ureter
D. Bladder

8. Sweat contains:

A. Oxygen
B. Urea only
C. Water and salts
D. Glucose

9. Urine is stored in:

A. Kidney
B. Ureter
C. Bladder
D. Nephron

10. Removal of nitrogenous waste is called:

A. Respiration
B. Digestion
C. Excretion
D. Circulation

✔ Answer Key

1–B
2–B
3–B
4–C
5–C
6–B
7–B
8–C
9–C
10–C

🔖 Hashtags

Next Topic: Biotechnology (Class 9 Biology)
(According to KP Textbook + Dogar SST + KPPSC pattern)

BIOTECHNOLOGY – CLASS 9

1. Definition

Biotechnology is the use of living organisms, cells, or their components to produce useful products for humans.

2. Branches of Biotechnology

Traditional Biotechnology → e.g., fermentation (bread, yogurt)

Modern Biotechnology → genetic engineering, DNA technology

3. Genetic Engineering

Process of changing DNA of an organism

Involves inserting desired genes

4. Important Tools

Restriction enzymes → cut DNA

DNA ligase → joins DNA fragments

Vectors (plasmids) → carry genes into cells

5. Applications of Biotechnology

A. Medical

Production of insulin

Vaccines

Gene therapy

B. Agriculture

Improved crops

Pest-resistant plants

C. Industry

Enzymes in detergents

Fermentation products

6. Advantages

Increased food production

Disease treatment

Better quality products

7. Risks / Concerns

Ethical issues

Environmental impact

Health risks

MCQs – BIOTECHNOLOGY

1. Biotechnology involves the use of:

A. Non-living things
B. Living organisms
C. Machines only
D. Chemicals only

2. Genetic engineering deals with:

A. Proteins
B. DNA modification
C. Carbohydrates
D. Lipids

3. Enzyme used to cut DNA is:

A. DNA ligase
B. Amylase
C. Restriction enzyme
D. Lipase

4. DNA ligase is used to:

A. Cut DNA
B. Join DNA
C. Replicate DNA
D. Destroy DNA

5. Plasmids act as:

A. Enzymes
B. Vectors
C. Proteins
D. Hormones

6. Insulin production using bacteria is an example of:

A. Traditional biotechnology
B. Genetic engineering
C. Fermentation
D. Digestion

7. Fermentation is a process used in:

A. Respiration
B. Food production
C. Photosynthesis
D. Excretion

8. Biotechnology helps in agriculture by:

A. Reducing crops
B. Increasing pests
C. Improving crops
D. Destroying soil

9. Gene therapy is used to:

A. Improve soil
B. Treat diseases
C. Increase rainfall
D. Produce oxygen

10. One risk of biotechnology is:

A. Food production
B. Ethical concerns
C. Better health
D. Improved crops

Answer Key

1–B
2–B
3–C
4–B
5–B
6–B
7–B
8–C
9–B
10–B

🔖 Hashtags

Next Topic: Variation & Genetics (Class 9 Biology)
(According to KP Textbook + Dogar SST + KPPSC MCQs pattern)

VARIATION & GENETICS – CLASS 9

1. Definition

Genetics: Study of heredity (inheritance of traits).

Variation: Differences among individuals of the same species.

2. Important Terms

Gene: Unit of heredity (located on chromosomes).

Alleles: Different forms of a gene.

Chromosomes: Structures carrying genetic material (DNA).

DNA: Genetic material controlling traits.

3. Types of Variation

1. Continuous Variation

Gradual differences (e.g., height, weight)

2. Discontinuous Variation

Clear differences (e.g., blood groups)

4. Mendel’s Contributions

Known as Father of Genetics

Worked on pea plants

Gave laws of inheritance

Mendel’s Laws

1. Law of Segregation

2. Law of Independent Assortment

5. Dominant & Recessive Traits

Dominant: Expressed in heterozygous condition

Recessive: Expressed only in homozygous condition

6. Importance of Variation

Helps in adaptation

Leads to evolution

Increases survival chances

MCQs – VARIATION & GENETICS

1. Genetics is the study of:

A. Evolution
B. Heredity
C. Ecology
D. Anatomy

2. The basic unit of heredity is:

A. Chromosome
B. Gene
C. Cell
D. Nucleus

3. Mendel is known as:

A. Father of Biology
B. Father of Evolution
C. Father of Genetics
D. Father of Medicine

4. Mendel worked on:

A. Wheat plants
B. Rice plants
C. Pea plants
D. Corn plants

5. Different forms of a gene are called:

A. Chromosomes
B. Alleles
C. DNA
D. Traits

6. Trait expressed in heterozygous condition is:

A. Recessive
B. Dominant
C. Neutral
D. Hidden

7. Continuous variation includes:

A. Blood group
B. Gender
C. Height
D. Eye color

8. Discontinuous variation includes:

A. Weight
B. Height
C. Blood group
D. Skin color

9. Chromosomes are made of:

A. Protein only
B. Lipids
C. DNA and protein
D. Carbohydrates

10. Law of segregation states that:

A. Genes mix together
B. Genes separate during gamete formation
C. Traits disappear
D. Genes combine randomly

Answer Key

1–B
2–B
3–C
4–C
5–B
6–B
7–C
8–C
9–C
10–B

Next Topic: Cell Cycle & Cell Division (Class 9 Biology)
(Prepared according to KP Textbook + Dogar SST + KPPSC pattern)

CELL CYCLE & CELL DIVISION – CLASS 9

1. Cell Cycle

The cell cycle is the sequence of events in which a cell grows, replicates its DNA, and divides.

Phases of Cell Cycle

1. Interphase (longest phase)

Cell grows

DNA replicates

2. Mitotic Phase (M Phase)

Cell divides into two daughter cells

2. Types of Cell Division

A. Mitosis

Occurs in somatic (body) cells

Produces 2 identical diploid cells

Important for growth & repair

Phases of Mitosis (PMAT)

1. Prophase – Chromosomes become visible

2. Metaphase – Chromosomes align at center

3. Anaphase – Chromatids separate

4. Telophase – Two nuclei form

B. Meiosis

Occurs in germ cells

Produces 4 haploid cells

Important for sexual reproduction

Key Feature

Crossing over occurs in Prophase I

3. Difference between Mitosis & Meiosis

Mitosis Meiosis

2 daughter cells 4 daughter cells
Diploid (2n) Haploid (n)
No variation Genetic variation
Growth & repair Gamete formation

4. Importance

Growth of organism

Repair of damaged tissues

Continuity of life

MCQs – CELL CYCLE & CELL DIVISION

1. Cell cycle consists of:

A. One phase
B. Two phases
C. Three phases
D. Four phases

2. Longest phase of cell cycle is:

A. Prophase
B. Metaphase
C. Interphase
D. Telophase

3. DNA replication occurs during:

A. Prophase
B. Interphase
C. Anaphase
D. Telophase

4. Mitosis produces:

A. 4 cells
B. 3 cells
C. 2 identical cells
D. 1 cell

5. Meiosis occurs in:

A. Somatic cells
B. Germ cells
C. Nerve cells
D. Muscle cells

6. Chromosomes align at equator during:

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

7. Separation of chromatids occurs in:

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

8. Crossing over occurs in:

A. Prophase I
B. Metaphase II
C. Anaphase I
D. Telophase II

9. Meiosis results in cells that are:

A. Diploid
B. Haploid
C. Polyploid
D. Triploid

10. Mitosis is important for:

A. Reproduction
B. Growth and repair
C. Variation
D. Mutation

Answer Key

1–B
2–C
3–B
4–C
5–B
6–B
7–C
8–A
9–B
10–B

Topic: Transport in Humans (Class 9 Biology)
(Prepared according to KP Textbook + Dogar SST + KPPSC MCQs pattern)

TRANSPORT IN HUMANS CLASS 9

1. Definition

Transport in humans is the movement of oxygen, nutrients, hormones, and waste materials throughout the body by the circulatory system.

2. Components of Transport System

Heart

Blood

Blood vessels

3. Heart

Muscular organ

Pumps blood throughout the body

Located between lungs

Has 4 chambers:

Right atrium

Right ventricle

Left atrium

Left ventricle

4. Blood Vessels

A. Arteries

Carry blood away from heart

Thick walls

Usually oxygenated blood

B. Veins

Carry blood towards heart

Thin walls

Have valves

C. Capillaries

Very thin

Exchange of materials

5. Blood

Blood consists of:

Plasma

Red blood cells (RBCs)

White blood cells (WBCs)

Platelets

6. Functions of Blood

Transport oxygen and food

Remove wastes

Fight infections

Regulate body temperature

7. Double Circulation

Blood passes twice through heart in one cycle

Humans have double circulation

MCQs TRANSPORT IN HUMANS

1. Human transport system is called:

A. Respiratory system
B. Digestive system
C. Circulatory system
D. Nervous system

2. Number of chambers in human heart:

A. 2
B. 3
C. 4
D. 5

3. Blood vessels carrying blood away from heart:

A. Veins
B. Capillaries
C. Arteries
D. Venules

4. Which blood vessel has valves?

A. Artery
B. Capillary
C. Vein
D. Aorta

5. RBCs contain:

A. Plasma
B. Hemoglobin
C. Antibodies
D. Platelets

6. Function of WBCs is to:

A. Carry oxygen
B. Clot blood
C. Fight disease
D. Transport hormones

7. Liquid part of blood is:

A. Serum
B. Plasma
C. RBC
D. Platelet

8. Exchange of gases occurs in:

A. Arteries
B. Veins
C. Capillaries
D. Heart

9. Platelets help in:

A. Immunity
B. Respiration
C. Blood clotting
D. Digestion

10. Humans have __________ circulation.

A. Single
B. Double
C. Triple
D. Open

✔ Answer Key

1–C
2–C
3–C
4–C
5–B
6–C
7–B
8–C
9–C
10–B

Topic: Transport in Plants (Class 9 Biology)
(Aligned with KP Textbook + Dogar SST + KPPSC MCQs pattern)

TRANSPORT IN PLANTS CLASS 9

1. Definition

Transport in plants is the movement of water, minerals, and food from one part of the plant to another.

2. Transport of Water & Minerals

Water and minerals are absorbed from soil by roots and transported upward.

Pathway

Root hairs → Cortex → Endodermis → Xylem → Leaves

Tissues Involved

Xylem: transports water and minerals

3. Mechanisms of Water Transport

A. Diffusion

Movement from higher to lower concentration

No energy required

B. Osmosis

Movement of water through semi-permeable membrane

C. Active Transport

Requires energy (ATP)

Against concentration gradient

4. Transpiration

Loss of water in the form of water vapour from aerial parts of plants, mainly through stomata.

Importance of Transpiration

Cooling effect

Helps in ascent of sap

Maintains water balance

5. Factors Affecting Transpiration

Light

Temperature

Humidity

Wind speed

6. Transport of Food

Occurs through Phloem

Process is called Translocation

Food moves from leaves (source) to other parts (sink)

7. Vascular Bundles

Xylem + Phloem together form vascular bundles

TRANSPORT IN PLANTS

1. Water is transported in plants through:

A. Phloem
B. Cortex
C. Xylem
D. Cambium

2. Food is transported by:

A. Xylem
B. Phloem
C. Root hair
D. Epidermis

3. Loss of water vapour from plant surface is called:

A. Respiration
B. Transpiration
C. Photosynthesis
D. Diffusion

4. Most transpiration occurs through:

A. Lenticels
B. Cuticle
C. Stomata
D. Roots

5. Movement of water across semi-permeable membrane is:

A. Diffusion
B. Active transport
C. Osmosis
D. Translocation

6. Active transport requires:

A. Oxygen
B. Energy
C. Sunlight
D. CO₂

7. Which tissue transports water upward?

A. Phloem
B. Xylem
C. Cambium
D. Cortex

8. Translocation occurs in:

A. Xylem
B. Phloem
C. Root hairs
D. Leaves only

9. Which factor increases transpiration?

A. High humidity
B. Low temperature
C. Wind
D. Darkness

10. Vascular bundle consists of:

A. Xylem only
B. Phloem only
C. Xylem and phloem
D. Cambium only

✔ Answer Key

1–C
2–B
3–B
4–C
5–C
6–B
7–B
8–B
9–C
10–C

Next Topic: Respiration (Class 9 Biology)
(According to KP Textbook + Dogar SST + KPPSC pattern)

🔥 RESPIRATION – CLASS 9

1. Definition

Respiration is the process by which energy is released from food (glucose) inside living cells for carrying out life activities.

2. Purpose of Respiration

Energy released during respiration is used for:

Growth

Movement

Repair of tissues

Active transport

Reproduction

3. Types of Respiration

A. Aerobic Respiration

Occurs in presence of oxygen

Produces more energy

End products: CO₂ + H₂O + ATP

Occurs in mitochondria

Equation:

C_6H_{12}O_6 + 6O_2 → 6CO_2 + 6H_2O + Energy

B. Anaerobic Respiration

Occurs in absence of oxygen

Produces less energy

Occurs in cytoplasm

In plants & yeast:

Glucose → Alcohol + CO_2 + Energy

In animals:

Glucose → Lactic\ acid + Energy

4. Cellular Respiration

Breakdown of glucose inside cells to release energy in the form of ATP.

5. Difference between Breathing and Respiration

Breathing Respiration

Physical process Chemical process
Occurs in lungs Occurs in cells
No energy released Energy released

6. Importance of Respiration

Supplies energy to cells

Maintains body temperature

Essential for survival

MCQs RESPIRATION (Class 9)

1. Respiration is a process of:

A. Energy storage
B. Energy release
C. Growth
D. Excretion

2. Aerobic respiration takes place in:

A. Cytoplasm
B. Ribosome
C. Mitochondria
D. Nucleus

3. Anaerobic respiration produces:

A. More energy
B. No energy
C. Less energy
D. Equal energy

4. End products of aerobic respiration are:

A. Alcohol and CO₂
B. Lactic acid and energy
C. CO₂, water and ATP
D. Oxygen and glucose

5. Anaerobic respiration in muscles produces:

A. Alcohol
B. CO₂
C. Lactic acid
D. Water

6. Which gas is required for aerobic respiration?

A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Hydrogen

7. Glycolysis occurs in:

A. Mitochondria
B. Cytoplasm
C. Nucleus
D. Chloroplast

8. The energy released during respiration is stored in:

A. DNA
B. Starch
C. ATP
D. Protein

9. Respiration occurs in:

A. Animals only
B. Plants only
C. All living organisms
D. Fungi only

10. Which process is common in both aerobic and anaerobic respiration?

A. Krebs cycle
B. Electron transport chain
C. Glycolysis
D. Calvin cycle

✔ Answer Key

1–B
2–C
3–C
4–C
5–C
6–C
7–B
8–C
9–C
10–C

The examination schedule for the fourth phase of the induction programme has been announced by DCTE.