WorksheetsNutrition & Life Processes Quiz
Total questions: 50
Worksheet time: 50mins
A plant kept in darkness for several days shows no starch in its leaves. This observation directly supports the role of:
Carbon dioxide
Chlorophyll
Sunlight
Water
Why is diffusion insufficient to meet oxygen requirements in multicellular organisms?
Oxygen is insoluble
Body size is large
Cells lack enzymes
Blood pressure is low
Which factor best explains why viruses are considered borderline between living and non-living?
Lack of DNA
Absence of molecular movement outside host
No respiration
No reproduction
Autotrophic nutrition differs from heterotrophic nutrition because autotrophs:
Depend on enzymes
Synthesize food from inorganic substances
Use complex food directly
Lack chlorophyll
Which condition is essential for photosynthesis but not for respiration?
Oxygen
Carbon dioxide
Water
Sunlight
In a variegated leaf experiment, starch is absent in non-green areas because they lack:
Stomata
Chloroplasts
Water
Enzymes
Desert plants take in carbon dioxide at night mainly to:
Increase respiration
Reduce water loss
Absorb more sunlight
Increase transpiration
Guard cells open stomata when they:
Lose water
Gain water and become turgid
Shrink
Stop photosynthesis
Which mineral is essential for protein synthesis in plants?
Magnesium
Iron
Nitrogen
Calcium
Potassium hydroxide is used in photosynthesis experiments to absorb:
Oxygen
Water vapour
Carbon dioxide
Nitrogen
The mode of nutrition in fungi is best described as:
Autotrophic
Parasitic
Saprophytic
Holozoic
Salivary amylase helps in digestion by breaking down:
Proteins into amino acids
Starch into sugars
Fats into fatty acids
Cellulose into glucose
Peristaltic movement in the alimentary canal helps in:
Absorption of food
Mixing enzymes
Movement of food forward
Secretion of juices
Hydrochloric acid in the stomach mainly helps by:
Digesting fats
Killing harmful bacteria
Neutralising bile
Absorbing nutrients
Herbivores have a longer small intestine because:
They eat more
Cellulose digestion is slow
Proteins are complex
Fats need emulsification
Breakdown of glucose into pyruvate occurs in the:
Mitochondria
Cytoplasm
Nucleus
Chloroplast
Lactic acid formation in muscles occurs due to:
Excess oxygen
Anaerobic respiration
Lack of glucose
Increased ATP
Which process releases the maximum energy?
Fermentation
Anaerobic respiration
Aerobic respiration
Glycolysis
ATP is called the energy currency of the cell because it:
Stores glucose
Transfers usable energy
Produces enzymes
Stores oxygen
Fish breathe faster than humans because:
Gills are inefficient
Water has less dissolved oxygen
Fish are cold-blooded
They lack lungs
Alveoli are efficient for gas exchange because they:
Are muscular
Have thick walls
Provide large surface area
Contain cartilage
Haemoglobin is important because it:
Transports carbon dioxide only
Increases oxygen carrying capacity
Produces ATP
Controls respiration
Smoking damages cilia in respiratory tract leading to:
Better oxygen intake
Increased filtration
Accumulation of dust and microbes
Reduced respiration rate
Carbon dioxide is mostly transported in blood as:
Bound to haemoglobin
Dissolved in plasma
Solid particles
Gas bubbles
Residual air in lungs is important because it:
Prevents lung collapse
Stores carbon dioxide
Allows continuous gas exchange
Stops infection
Double circulation is necessary in humans to:
Reduce blood pressure
Increase body temperature
Prevent mixing of blood
Increase heartbeat
The left ventricle has thicker walls because it:
Receives blood
Pumps blood to lungs
Pumps blood to the body
Stores blood
Which blood vessel carries oxygenated blood from lungs to heart?
Pulmonary artery
Pulmonary vein
Aorta
Vena cava
Capillaries are important because they:
Carry blood fast
Prevent leakage
Allow exchange with tissues
Maintain pressure
High blood pressure mainly affects:
Veins
Capillaries
Arteries
Lymph vessels
Xylem transports:
Food
Hormones
Water and minerals
Oxygen
Phloem transport requires energy because it involves:
Diffusion
Active translocation
Osmosis only
Root pressure
Transpiration helps plants by:
Reducing mineral absorption
Cooling and upward water movement
Increasing respiration
Storing water
Root pressure is most effective:
During daytime
At night
During flowering
In dry soil
Transport in phloem occurs in:
Only upward direction
Only downward direction
Both directions
One-way only
The functional unit of kidney is the:
Ureter
Nephron
Bowman's capsule
Glomerulus
Selective reabsorption occurs mainly in the:
Glomerulus
Bowman's capsule
Tubules of nephron
Ureter
Dialysis differs from kidney function because it lacks:
Filtration
Diffusion
Reabsorption
Blood flow
Plants store waste products in:
Roots only
Vacuoles, gums and resins
Xylem vessels
Phloem tissue
Oxygen is considered a waste product in plants because it is:
Toxic
Produced during photosynthesis
Unused
Absorbed again
Which life process directly supplies energy for all other processes?
Nutrition
Respiration
Transport
Excretion
A decrease in haemoglobin level will first affect:
Digestion
Excretion
Oxygen transport
Blood clotting
Which pair of structures perform similar functions?
Alveoli and nephrons
Stomata and villi
Heart and kidney
Xylem and alveoli
Which system links nutrition, respiration and excretion?
Nervous system
Digestive system
Circulatory system
Endocrine system
Why is maintenance of life called a continuous process?
It happens only at night
It stops during sleep
It occurs even without visible activity
It occurs only during growth
Which organism shows extracellular digestion?
Amoeba
Human
Mushroom
Paramecium
The main function of bile juice is to:
Digest proteins
Digest carbohydrates
Emulsify fats
Absorb vitamins
Which factor mainly determines the rate of transpiration?
Root pressure
Sunlight and stomatal opening
Soil nutrients
Phloem transport
Lymph is important because it:
Carries oxygen
Transports fats and excess fluid
Produces RBCs
Clots blood
Which life process is least directly involved in energy release?
Nutrition
Respiration
Transport
Excretion
