Nutrition in plants- Mcqs -

Plant Nutrition MCQ Test

Q1: What is nutrition?

A) The process of intake and utilization of food by the body
B) The process of breathing
C) The process of movement in plants
D) The process of reproduction

Answer: A) The process of intake and utilization of food by the body

Q2: Why is nutrition important for living organisms?

A) It provides energy for photosynthesis
B) It is essential for performing life activities
C) It helps in the formation of new species
D) It aids in the digestion of food

Answer: B) It is essential for performing life activities

Q3: What are the two modes of nutrition in plants?

A) Autotrophic and Parasitic
B) Autotrophic and Heterotrophic
C) Heterotrophic and Symbiotic
D) Saprophytic and Insectivorous

Answer: B) Autotrophic and Heterotrophic

Q4: What are the raw materials used in photosynthesis?

A) Oxygen and water
B) Water and carbon dioxide
C) Glucose and oxygen
D) Chlorophyll and sunlight

Answer: B) Water and carbon dioxide

Q5: What conditions are required for photosynthesis?

A) Water, sunlight, and open stomata
B) Sunlight, chlorophyll, and open stomata
C) Sunlight, oxygen, and chlorophyll
D) Water, oxygen, and chlorophyll

Answer: B) Sunlight, chlorophyll, and open stomata

Q6: Which structures in the plant are involved in photosynthesis?

A) Stems and roots
B) Leaves and roots
C) Flowers and fruits
D) Seeds and stems

Answer: B) Leaves and roots

Q7: What is the word equation for photosynthesis?

A) Glucose + Oxygen —> Carbon dioxide + Water
B) Carbon dioxide + Water —(Sunlight & Chlorophyll)—> Glucose + Oxygen
C) Water + Oxygen —> Glucose + Carbon dioxide
D) Carbon dioxide + Glucose —> Water + Oxygen

Answer: B) Carbon dioxide + Water —(Sunlight & Chlorophyll)—> Glucose + Oxygen

Q8: What is autotrophic nutrition?

A) The process of feeding on other organisms
B) The process of making food from simple substances like carbon dioxide and water
C) The process of decaying organic matter
D) The process of symbiotic relationship

Answer: B) The process of making food from simple substances like carbon dioxide and water

Q9: Why are plants called producers?

A) They consume other organisms
B) They produce their own food through photosynthesis
C) They decompose organic matter
D) They rely on other plants for food

Answer: B) They produce their own food through photosynthesis

Q10: How does photosynthesis occur in autotrophs?

A) By converting glucose and oxygen into carbon dioxide and water
B) By converting carbon dioxide and water into glucose and oxygen using sunlight and chlorophyll
C) By absorbing nutrients from the soil
D) By trapping insects and digesting them

Answer: B) By converting carbon dioxide and water into glucose and oxygen using sunlight and chlorophyll

Q11: What is photosynthesis?

A) The process by which green plants use sunlight to synthesize foods from carbon dioxide and water
B) The process of breaking down glucose
C) The process of decomposing organic matter
D) The process of respiration in plants

Answer: A) The process by which green plants use sunlight to synthesize foods from carbon dioxide and water

Q12: Why are leaves green?

A) Due to chlorophyll containing green pigment
B) Due to the presence of water
C) Due to the presence of sunlight
D) Due to the presence of nutrients

Answer: A) Due to chlorophyll containing green pigment

Q13: How do leaves capture the maximum amount of sunlight?

A) By being green
B) By growing in different patterns
C) By being large in size
D) By facing the sun

Answer: D) By facing the sun

Q14: Why keep the plant in the dark during the experiment to demonstrate the necessity of sunlight for photosynthesis?

A) To dehydrate the plant
B) To destarch the leaves
C) To wilt the plant
D) To make the leaves turn yellow

Answer: B) To destarch the leaves

Q15: Why do we boil the leaf in alcohol during the photosynthesis experiment?

A) To remove water
B) To remove chlorophyll
C) To remove carbon dioxide
D) To remove oxygen

Answer: B) To remove chlorophyll

Q16: Why does the uncovered part of the leaf turn blue-black during the photosynthesis experiment?

A) Because it contains glucose
B) Because it contains starch
C) Because it contains protein
D) Because it contains fat

Answer: B) Because it contains starch

Q17: What is chlorophyll?

A) A green pigment in chloroplasts, crucial for photosynthesis
B) A yellow pigment in leaves
C) A red pigment in flowers
D) A blue pigment in stems

Answer: A) A green pigment in chloroplasts, crucial for photosynthesis

Q18: Where does photosynthesis occur besides leaves?

A) In roots
B) In flowers
C) In other green parts like stems and branches
D) In fruits

Answer: C) In other green parts like stems and branches

Q19: What is the role of stomata in photosynthesis?

A) They absorb water
B) They allow carbon dioxide in and oxygen out of the leaf
C) They store food
D) They support the leaf structure

Answer: B) They allow carbon dioxide in and oxygen out of the leaf

Q20: How are water and minerals transported in plants?

A) Through phloem
B) Through xylem
C) Through stomata
D) Through roots only

Answer: B) Through xylem

Q21: What if there were no plants for photosynthesis on Earth?

A) Life would flourish
B) Life as we know it would not exist
C) There would be more oxygen
D) There would be no change

Answer: B) Life as we know it would not exist

Q22: What is the purpose of the activity involving plants named Normy, Greeny, Sunny, Airy, and Watty?

A) To show the growth patterns of different plants
B) To show that chlorophyll, sunlight, water, and carbon dioxide are necessary for photosynthesis
C) To show the different colors of plant leaves
D) To show the respiration process in plants

Answer: B) To show that chlorophyll, sunlight, water, and carbon dioxide are necessary for photosynthesis

Q23: What condition was Sunny exposed to in the experiment?

A) Water
B) Sunlight
C) Darkness
D) Air

Answer: B) Sunlight

Q24: What does a positive starch test indicate in the photosynthesis experiment?

A) The presence of glucose
B) The presence of starch
C) The absence of photosynthesis
D) The presence of oxygen

Answer: B) The presence of starch

Q25: Why do red leaves have less chlorophyll?

A) They have more red pigment
B) They have less sunlight
C) They have more water
D) They have less carbon dioxide

Answer: A) They have more red pigment

Q26: What is saprotrophic nutrition?

A) When organisms feed on decaying organic matter
B) When organisms produce their own food
C) When organisms live symbiotically
D) When organisms trap and digest insects

Answer: A) When organisms feed on decaying organic matter

Q27: Which mode of nutrition can be compared to a total parasite?

A) Symbiotic
B) Insectivorous
C) Parasitic
D) Saprotrophic

Answer: C) Parasitic

Q28: What is a symbiotic relationship in plants?

A) When plants trap and digest insects
B) When plants feed on dead organic matter
C) When plants live in a mutually beneficial relationship with another organism
D) When plants live on other plants

Answer: C) When plants live in a mutually beneficial relationship with another organism

Q29: Why do farmers grow leguminous crops alternatively with other crops?

A) To increase soil acidity
B) To enrich the soil with nitrogen
C) To reduce soil moisture
D) To increase soil salinity

Answer: B) To enrich the soil with nitrogen

Q30: What are heterotrophic organisms?

A) Organisms that carry out photosynthesis
B) Organisms that rely on others for their nutrition
C) Organisms that produce their own food
D) Organisms that live symbiotically

Answer: B) Organisms that rely on others for their nutrition

Q31: What do parasitic plants do?

A) They produce their own food
B) They feed on dead organic matter
C) They live on and derive nutrients from other plants
D) They trap and digest insects

Answer: C) They live on and derive nutrients from other plants

Q32: How do saprophytic plants obtain nutrients?

A) They perform photosynthesis
B) They feed on living plants
C) They feed on dead and decaying organic matter
D) They trap and digest insects

Answer: C) They feed on dead and decaying organic matter

Q33: Why do insectivorous plants feed on insects?

A) To obtain carbon dioxide
B) To obtain nitrogen
C) To obtain oxygen
D) To obtain water

Answer: B) To obtain nitrogen

Q34: Can insectivorous plants prepare their own food?

A) No, they rely entirely on insects
B) Yes, they can prepare their own food through photosynthesis
C) No, they rely entirely on other plants
D) Yes, but they need water for photosynthesis

Answer: B) Yes, they can prepare their own food through photosynthesis

Q35: What is the common feature of parasitic and saprotrophic plants?

A) Both produce their own food
B) Both feed on other organisms
C) Both live symbiotically
D) Both trap and digest insects

Answer: B) Both feed on other organisms

Q36: What is the main purpose of photosynthesis in plants?

A) To produce oxygen
B) To produce food
C) To produce carbon dioxide
D) To produce water

Answer: B) To produce food

Q37: What pigment is responsible for trapping sunlight in plants?

A) Chlorophyll
B) Carotene
C) Anthocyanin
D) Xanthophyll

Answer: A) Chlorophyll

Q38: How do plants obtain nitrogen for protein synthesis?

A) From the air
B) From the soil through nitrogen-fixing bacteria
C) From water
D) From sunlight

Answer: B) From the soil through nitrogen-fixing bacteria

Q39: What is the role of Rhizobium bacteria in leguminous plants?

A) To decompose organic matter
B) To fix atmospheric nitrogen into soluble compounds
C) To produce food
D) To trap insects

Answer: B) To fix atmospheric nitrogen into soluble compounds

Q40: What is the significance of chlorophyll in photosynthesis?

A) It absorbs carbon dioxide
B) It absorbs water
C) It traps solar energy
D) It releases oxygen

Answer: C) It traps solar energy

Q41: What happens if the stomata on leaves are blocked?

A) Photosynthesis will increase
B) Photosynthesis will be negatively affected
C) Water absorption will increase
D) Oxygen release will increase

Answer: B) Photosynthesis will be negatively affected

Q42: Why are legumes important in agriculture?

A) They increase soil acidity
B) They enrich soil with nitrogen
C) They reduce soil moisture
D) They produce carbon dioxide

Answer: B) They enrich soil with nitrogen

Q43: What type of relationship do lichens exhibit?

A) Parasitic
B) Symbiotic
C) Saprotrophic
D) Insectivorous

Answer: B) Symbiotic

Q44: Why do plants need nitrogen?

A) For carbohydrate synthesis
B) For protein synthesis
C) For fat synthesis
D) For oxygen production

Answer: B) For protein synthesis

Q45: What is the function of xylem in plants?

A) To transport food
B) To transport water and minerals
C) To transport oxygen
D) To transport carbon dioxide

Answer: B) To transport water and minerals

Q46: Why do insectivorous plants capture insects?

A) To obtain carbon dioxide
B) To obtain nitrogen
C) To obtain oxygen
D) To obtain water

Answer: B) To obtain nitrogen

Q47: What is the main product of photosynthesis?

A) Carbon dioxide
B) Water
C) Glucose
D) Oxygen

Answer: C) Glucose

Q48: How do leguminous plants benefit from Rhizobium bacteria?

A) They get water
B) They get nitrogen
C) They get carbon dioxide
D) They get oxygen

Answer: B) They get nitrogen

Q49: What is the main role of chlorophyll in photosynthesis?

A) To absorb carbon dioxide
B) To absorb water
C) To trap sunlight
D) To release oxygen

Answer: C) To trap sunlight

Q50: Why is sunlight important for photosynthesis?

A) It provides energy
B) It provides carbon dioxide
C) It provides water
D) It provides oxygen

Answer: A) It provides energy

Q51: What is the role of stomata during photosynthesis?

A) They absorb water
B) They allow carbon dioxide to enter and oxygen to exit
C) They store glucose
D) They trap sunlight

Answer: B) They allow carbon dioxide to enter and oxygen to exit

Q52: What is heterotrophic nutrition?

A) When organisms make their own food
B) When organisms obtain food from other organisms
C) When organisms use sunlight to produce food
D) When organisms live symbiotically

Answer: B) When organisms obtain food from other organisms

Q53: What are the raw materials for photosynthesis?

A) Glucose and oxygen
B) Carbon dioxide and water
C) Oxygen and water
D) Nitrogen and water

Answer: B) Carbon dioxide and water

Q54: What is the main product of photosynthesis in plants?

A) Oxygen
B) Water
C) Carbon dioxide
D) Glucose

Answer: D) Glucose

Q55: What is autotrophic nutrition in plants?

A) Making food from other organisms
B) Making food from simple substances like carbon dioxide and water
C) Breaking down dead organic matter
D) Living symbiotically

Answer: B) Making food from simple substances like carbon dioxide and water

Q56: Why are plants considered producers?

A) They consume other organisms
B) They produce their own food through photosynthesis
C) They decompose organic matter
D) They absorb nutrients from other plants

Answer: B) They produce their own food through photosynthesis

Q57: What is the function of chlorophyll in plants?

A) To absorb carbon dioxide
B) To absorb water
C) To trap sunlight
D) To release oxygen

Answer: C) To trap sunlight

Q58: Why do plants need sunlight?

A) To produce water
B) To produce carbon dioxide
C) To provide energy for photosynthesis
D) To absorb oxygen

Answer: C) To provide energy for photosynthesis

Q59: What does the experiment with covered and uncovered leaves demonstrate?

A) That water is necessary for photosynthesis
B) That carbon dioxide is necessary for photosynthesis
C) That sunlight is necessary for photosynthesis
D) That oxygen is necessary for photosynthesis

Answer: C) That sunlight is necessary for photosynthesis

Q60: What is the role of xylem in plants?

A) To transport food
B) To transport water and minerals
C) To transport oxygen
D) To transport carbon dioxide

Answer: B) To transport water and minerals

Q61: What is the role of Rhizobium bacteria in leguminous plants?

A) To decompose organic matter
B) To fix atmospheric nitrogen into soluble compounds
C) To produce food
D) To trap insects

Answer: B) To fix atmospheric nitrogen into soluble compounds

Q62: What is saprotrophic nutrition?

A) When organisms feed on decaying organic matter
B) When organisms produce their own food
C) When organisms live symbiotically
D) When organisms trap and digest insects

Answer: A) When organisms feed on decaying organic matter

Q63: What is symbiotic nutrition in plants?

A) When plants trap and digest insects
B) When plants feed on dead organic matter
C) When plants live in a mutually beneficial relationship with another organism
D) When plants live on other plants

Answer: C) When plants live in a mutually beneficial relationship with another organism

Q64: Why do farmers grow leguminous crops alternatively with other crops?

A) To increase soil acidity
B) To enrich the soil with nitrogen
C) To reduce soil moisture
D) To increase soil salinity

Answer: B) To enrich the soil with nitrogen

Q65: What are heterotrophic organisms?

A) Organisms that carry out photosynthesis
B) Organisms that rely on others for their nutrition
C) Organisms that produce their own food
D) Organisms that live symbiotically

Answer: B) Organisms that rely on others for their nutrition

Q66: What do parasitic plants do?

A) They produce their own food
B) They feed on dead organic matter
C) They live on and derive nutrients from other plants
D) They trap and digest insects

Answer: C) They live on and derive nutrients from other plants

Q67: How do saprophytic plants obtain nutrients?

A) They perform photosynthesis
B) They feed on living plants
C) They feed on dead and decaying organic matter
D) They trap and digest insects

Answer: C) They feed on dead and decaying organic matter

Q68: Why do insectivorous plants feed on insects?

A) To obtain carbon dioxide
B) To obtain nitrogen
C) To obtain oxygen
D) To obtain water

Answer: B) To obtain nitrogen

Q69: Can insectivorous plants prepare their own food?

A) No, they rely entirely on insects
B) Yes, they can prepare their own food through photosynthesis
C) No, they rely entirely on other plants
D) Yes, but they need water for photosynthesis

Answer: B) Yes, they can prepare their own food through photosynthesis

Q70: What is the common feature of parasitic and saprotrophic plants?

A) Both produce their own food
B) Both feed on other organisms
C) Both live symbiotically
D) Both trap and digest insects

Answer: B) Both feed on other organisms

Q71: What is the main purpose of photosynthesis in plants?

A) To produce oxygen
B) To produce food
C) To produce carbon dioxide
D) To produce water

Answer: B) To produce food

Q72: What pigment is responsible for trapping sunlight in plants?

A) Chlorophyll
B) Carotene
C) Anthocyanin
D) Xanthophyll

Answer: A) Chlorophyll

Q73: How do plants obtain nitrogen for protein synthesis?

A) From the air
B) From the soil through nitrogen-fixing bacteria
C) From water
D) From sunlight

Answer: B) From the soil through nitrogen-fixing bacteria

Q74: What is the role of Rhizobium bacteria in leguminous plants?

A) To decompose organic matter
B) To fix atmospheric nitrogen into soluble compounds
C) To produce food
D) To trap insects

Answer: B) To fix atmospheric nitrogen into soluble compounds

Q75: What is the significance of chlorophyll in photosynthesis?

A) It absorbs carbon dioxide
B) It absorbs water
C) It traps solar energy
D) It releases oxygen

Answer: C) It traps solar energy

Q76: What happens if the stomata on leaves are blocked?

A) Photosynthesis will increase
B) Photosynthesis will be negatively affected
C) Water absorption will increase
D) Oxygen release will increase

Answer: B) Photosynthesis will be negatively affected

Q77: Why are legumes important in agriculture?

A) They increase soil acidity
B) They enrich soil with nitrogen
C) They reduce soil moisture
D) They produce carbon dioxide

Answer: B) They enrich soil with nitrogen

Q78: What type of relationship do lichens exhibit?

A) Parasitic
B) Symbiotic
C) Saprotrophic
D) Insectivorous

Answer: B) Symbiotic

Q79: Why do plants need nitrogen?

A) For carbohydrate synthesis
B) For protein synthesis
C) For fat synthesis
D) For oxygen production

Answer: B) For protein synthesis

Q80: What is the function of xylem in plants?

A) To transport food
B) To transport water and minerals
C) To transport oxygen
D) To transport carbon dioxide

Answer: B) To transport water and minerals

Q81: Why do insectivorous plants capture insects?

A) To obtain carbon dioxide
B) To obtain nitrogen
C) To obtain oxygen
D) To obtain water

Answer: B) To obtain nitrogen

Q82: What is the main product of photosynthesis?

A) Carbon dioxide
B) Water
C) Glucose
D) Oxygen

Answer: C) Glucose

Q83: How do leguminous plants benefit from Rhizobium bacteria?

A) They get water
B) They get nitrogen
C) They get carbon dioxide
D) They get oxygen

Answer: B) They get nitrogen

Q84: What is the main role of chlorophyll in photosynthesis?

A) To absorb carbon dioxide
B) To absorb water
C) To trap sunlight
D) To release oxygen

Answer: C) To trap sunlight

Q85: Why is sunlight important for photosynthesis?

A) It provides energy
B) It provides carbon dioxide
C) It provides water
D) It provides oxygen

Answer: A) It provides energy

Q86: What does the experiment with covered and uncovered leaves demonstrate?

A) That water is necessary for photosynthesis
B) That carbon dioxide is necessary for photosynthesis
C) That sunlight is necessary for photosynthesis
D) That oxygen is necessary for photosynthesis

Answer: C) That sunlight is necessary for photosynthesis

Q87: What is the role of xylem in plants?

A) To transport food
B) To transport water and minerals
C) To transport oxygen
D) To transport carbon dioxide

Answer: B) To transport water and minerals

Q88: What is the role of Rhizobium bacteria in leguminous plants?

A) To decompose organic matter
B) To fix atmospheric nitrogen into soluble compounds
C) To produce food
D) To trap insects

Answer: B) To fix atmospheric nitrogen into soluble compounds

Q89: What is saprotrophic nutrition?

A) When organisms feed on decaying organic matter
B) When organisms produce their own food
C) When organisms live symbiotically
D) When organisms trap and digest insects

Answer: A) When organisms feed on decaying organic matter

Q90: What is symbiotic nutrition in plants?

A) When plants trap and digest insects
B) When plants feed on dead organic matter
C) When plants live in a mutually beneficial relationship with another organism
D) When plants live on other plants

Answer: C) When plants live in a mutually beneficial relationship with another organism

Q91: Why do farmers grow leguminous crops alternatively with other crops?

A) To increase soil acidity
B) To enrich the soil with nitrogen
C) To reduce soil moisture
D) To increase soil salinity

Answer: B) To enrich the soil with nitrogen

Q92: What are heterotrophic organisms?

A) Organisms that carry out photosynthesis
B) Organisms that rely on others for their nutrition
C) Organisms that produce their own food
D) Organisms that live symbiotically

Answer: B) Organisms that rely on others for their nutrition

Q93: What do parasitic plants do?

A) They produce their own food
B) They feed on dead organic matter
C) They live on and derive nutrients from other plants
D) They trap and digest insects

Answer: C) They live on and derive nutrients from other plants

Q94: How do saprophytic plants obtain nutrients?

A) They perform photosynthesis
B) They feed on living plants
C) They feed on dead and decaying organic matter
D) They trap and digest insects

Answer: C) They feed on dead and decaying organic matter

Q95: Why do insectivorous plants feed on insects?

A) To obtain carbon dioxide
B) To obtain nitrogen
C) To obtain oxygen
D) To obtain water

Answer: B) To obtain nitrogen

Q96: Can insectivorous plants prepare their own food?

A) No, they rely entirely on insects
B) Yes, they can prepare their own food through photosynthesis
C) No, they rely entirely on other plants
D) Yes, but they need water for photosynthesis

Answer: B) Yes, they can prepare their own food through photosynthesis

Q97: What is the common feature of parasitic and saprotrophic plants?

A) Both produce their own food
B) Both feed on other organisms
C) Both live symbiotically
D) Both trap and digest insects

Answer: B) Both feed on other organisms

Q98: What is the main purpose of photosynthesis in plants?

A) To produce oxygen
B) To produce food
C) To produce carbon dioxide
D) To produce water

Answer: B) To produce food

Q99: What pigment is responsible for trapping sunlight in plants?

A) Chlorophyll
B) Carotene
C) Anthocyanin
D) Xanthophyll

Answer: A) Chlorophyll

Q100: How do plants obtain nitrogen for protein synthesis?

A) From the air
B) From the soil through nitrogen-fixing bacteria
C) From water
D) From sunlight

Answer: B) From the soil through nitrogen-fixing bacteria

Plant Nutrition MCQ Test

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