Knowledge Check: Life Processes
Life Processes – MCQ Practice
Category 1: Nutrition
Q1: Which process helps green plants to make their own food?
A) Respiration
B) Photosynthesis
C) Digestion
D) Transpiration
Q2: Which is an example of a parasitic plant?
A) Neem
B) Cactus
C) Cuscuta
D) Banyan
Q3: Which structure helps amoeba to engulf food?
A) Flagella
B) Pseudopodia
C) Tentacles
D) Cilia
Q4: Which animals chew cud for digestion?
A) Carnivores
B) Ruminants
C) Omnivores
D) Insectivores
Q5: Which acid is present in the human stomach?
A) Nitric acid
B) Hydrochloric acid
C) Acetic acid
D) Sulphuric acid
Q6: Which type of nutrition is found in animals?
A) Autotrophic
B) Saprophytic
C) Heterotrophic
D) Parasitic
Q7: Which is an insectivorous plant?
A) Tulsi
B) Pitcher plant
C) Lotus
D) Rose
Q8: Which part of digestive system connects mouth to stomach?
A) Trachea
B) Oesophagus
C) Intestine
D) Liver
Q9: Which nutrient mainly gives energy?
A) Protein
B) Fat
C) Carbohydrate
D) Vitamin
Q10: In which part does most digestion occur?
A) Stomach
B) Small intestine
C) Large intestine
D) Mouth
Respiration
Q1: Which process releases energy from the food we eat?
A) Photosynthesis
B) Respiration
C) Transpiration
D) Excretion
Q2: Which gas is taken in during breathing?
A) Carbon dioxide
B) Nitrogen
C) Oxygen
D) Hydrogen
Q3: Which gas is released during breathing out?
A) Oxygen
B) Hydrogen
C) Carbon dioxide
D) Nitrogen
Q4: Which organ helps humans in breathing?
A) Heart
B) Brain
C) Lungs
D) Kidney
Q5: Which organism breathes through moist skin?
A) Frog
B) Fish
C) Earthworm
D) Cockroach
Q6: Which body part helps fish to obtain oxygen from water?
A) Lungs
B) Gills
C) Trachea
D) Skin
Q7: Which type of respiration takes place in the presence of oxygen?
A) Anaerobic respiration
B) Aerobic respiration
C) Partial respiration
D) External respiration
Q8: Which part of the respiratory system connects nose to lungs?
A) Oesophagus
B) Trachea
C) Bronchioles
D) Alveoli
Q9: Which part of the lungs helps in exchange of gases?
A) Bronchi
B) Alveoli
C) Diaphragm
D) Windpipe
Q10: Which plant part helps in respiration?
A) Roots only
B) Flowers only
C) Stomata and lenticels
D) Fruits only
Transportation (Circulation)
Q1: Which tissue transports water in plants?
A) Phloem
B) Xylem
C) Cambium
D) Cortex
Q2: Which tissue carries prepared food in plants?
A) Xylem
B) Phloem
C) Cambium
D) Epidermis
Q3: Which organ pumps blood throughout the human body?
A) Brain
B) Lungs
C) Heart
D) Kidney
Q4: Which blood vessels carry oxygen-rich blood from the heart?
A) Veins
B) Capillaries
C) Arteries
D) Plasma
Q5: Which blood vessels carry blood back to the heart?
A) Arteries
B) Veins
C) Capillaries
D) Valves
Q6: Which blood vessels connect arteries and veins?
A) Arteries
B) Veins
C) Capillaries
D) Aorta
Q7: Which component of blood carries oxygen?
A) White blood cells
B) Platelets
C) Red blood cells
D) Plasma
Q8: What is the function of platelets?
A) Carry oxygen
B) Fight infections
C) Help in blood clotting
D) Transport food
Q9: What is meant by double circulation?
A) Blood flows only once in the body
B) Blood flows through heart once
C) Blood passes through heart twice in one cycle
D) Blood does not enter lungs
Q10: Which part of the plant transports water from roots to leaves?
A) Stem (Xylem)
B) Leaf (Phloem)
C) Flower (Xylem)
D) Root hairs only
Excretion
Q1: What is excretion?
A) Intake of food
B) Removal of wastes from the body
C) Movement of blood
D) Breathing process
Q2: Which organ removes waste from human blood?
A) Heart
B) Kidney
C) Liver
D) Lungs
Q3: Which waste is removed by lungs?
A) Sweat
B) Urea
C) Carbon dioxide
D) Urine
Q4: Which organ helps to store urine temporarily?
A) Kidney
B) Urinary bladder
C) Ureter
D) Urethra
Q5: Through which organs do plants release excess water?
A) Flowers
B) Leaves only
C) Lenticels and stomata
D) Fruits
Q6: What is the main nitrogenous waste in humans?
A) Uric acid
B) Ammonia
C) Urea
D) Creatinine
Q7: How do fish excrete nitrogenous waste?
A) Through kidneys only
B) Through gills
C) Through skin
D) Through mouth
Q8: Which part carries urine from kidneys to bladder?
A) Urethra
B) Nephrons
C) Ureter
D) Tubules
Q9: Which structure is the functional unit of kidney?
A) Neuron
B) Nephron
C) Alveoli
D) Ribosome
Q10: Which part of plant stores waste material?
A) Leaves only
B) Flowers only
C) Gums and resins
D) Roots only
Coordination
Q1: What is the main purpose of coordination in living beings?
A) To increase body size
B) To control and manage body activities
C) To stop body movements
D) To produce energy only
Q2: Which system controls all activities of the human body?
A) Digestive system
B) Circulatory system
C) Nervous system
D) Muscular system
Q3: Which part of the nervous system controls reflex actions?
A) Brain
B) Spinal cord
C) Nerves
D) Cerebrum
Q4: Which sense organ helps to detect sound?
A) Eye
B) Skin
C) Ear
D) Nose
Q5: Which type of action happens without conscious thinking?
A) Voluntary action
B) Involuntary action
C) Reflex action
D) Conscious reaction
Q6: Which part of the brain controls thinking and memory?
A) Cerebrum
B) Cerebellum
C) Medulla
D) Spinal cord
Q7: Which part of the nervous system connects brain with the rest of the body?
A) Nephrons
B) Nerves
C) Alveoli
D) Tendons
Q8: Which hormone causes growth in children?
A) Adrenaline
B) Insulin
C) Growth hormone
D) Thyroxine
Q9: Which sense organ detects smell?
A) Tongue
B) Nose
C) Eye
D) Ear
Q10: Why are reflex actions important?
A) They slow down body response
B) They waste energy
C) They protect the body from sudden danger
D) They make body inactive
Reproduction
Q1: What is reproduction?
A) Process of growing bigger
B) Process of making food
C) Process by which living beings produce young ones
D) Process of digestion
Q2: Which is an example of asexual reproduction?
A) Pollination in mango plant
B) Binary fission in Amoeba
C) Fertilization in humans
D) Egg laying in birds
Q3: Which plant reproduces by vegetative propagation using stem?
A) Onion
B) Potato
C) Bryophyte
D) Fern
Q4: Which part of the flower helps in pollination?
A) Root
B) Stem
C) Stigma
D) Sepal
Q5: Which animals lay eggs?
A) Viviparous animals
B) Oviparous animals
C) Mammals only
D) Amphibians only
Q6: How are seeds of dandelion dispersed?
A) By animals
B) By water
C) By wind
D) By insects
Q7: Which stage is seen in the life cycle of frog?
A) Larva (Tadpole)
B) Cocoon
C) Pupa only
D) Seed
Q8: Which part of flower produces pollen grains?
A) Stamen
B) Ovary
C) Style
D) Petal
Q9: Which reproduction requires both male and female parents?
A) Asexual reproduction
B) Vegetative reproduction
C) Sexual reproduction
D) Budding
Q10: What is fertilization?
A) Formation of seeds
B) Fusion of male and female gametes
C) Growth of plant
D) Spreading of seeds
Growing Up and Reproductive Health
Q1: What is the stage called when a child changes into an adult?
A) Childhood
B) Infancy
C) Adolescence
D) Old age
Q2: What is puberty?
A) Time of learning
B) Stage when the body becomes capable of reproduction
C) Stage of old age
D) Time of rest
Q3: Which hormone causes growth changes during adolescence?
A) Insulin
B) Growth hormone
C) Adrenaline
D) Digestive enzyme
Q4: Which change is commonly seen in boys during puberty?
A) Growth of moustache and beard
B) Development of ovaries
C) Start of menstruation
D) Shrinking of body
Q5: Which change happens in girls during puberty?
A) Voice becomes deeper like boys
B) Start of menstruation
C) Growth of beard
D) Increase of muscle mass only
Q6: Why is personal hygiene important during adolescence?
A) To look stylish only
B) To avoid harmful diseases and infections
C) To waste time
D) To reduce sleep
Q7: Which nutrient is most important during adolescence?
A) Only fats
B) Only carbohydrates
C) Balanced diet with proteins and vitamins
D) Only junk food
Q8: Which of the following is a bad habit to be avoided?
A) Regular exercise
B) Eating healthy food
C) Using drugs and alcohol
D) Drinking clean water
Q9: Which of the following helps adolescents to manage stress?
A) Skipping meals
B) Spending too much time on mobiles
C) Yoga and physical exercise
D) Avoiding sleep
Q10: Why is child marriage harmful?
A) It improves education
B) It supports proper growth
C) It affects health and future of children
D) It reduces population