Q. What is the function of phloem in plants?
A.
Transport of water
B.
Transport of food
C.
Photosynthesis
D.
Storage of nutrients
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Solution
Phloem is responsible for the transport of food, particularly the sugars produced during photosynthesis, from the leaves to other parts of the plant.
Correct Answer:
B
— Transport of food
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Q. What is the main product of photosynthesis?
A.
Oxygen
B.
Glucose
C.
Carbon dioxide
D.
Water
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Solution
The main product of photosynthesis is glucose, which serves as an energy source for the plant.
Correct Answer:
B
— Glucose
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Q. What is the main product of the Calvin cycle in photosynthesis?
A.
Oxygen
B.
Glucose
C.
Carbon dioxide
D.
ATP
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Solution
The Calvin cycle produces glucose as its main product, using carbon dioxide and energy from ATP and NADPH.
Correct Answer:
B
— Glucose
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Q. What is the main purpose of the xylem in plants? (2020)
A.
Transport of food
B.
Transport of water
C.
Photosynthesis
D.
Storage of nutrients
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Solution
Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transport of water
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Q. What is the primary function of root hairs in plants?
A.
Photosynthesis
B.
Water absorption
C.
Nutrient storage
D.
Gas exchange
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Solution
Root hairs increase the surface area of roots, enhancing the plant's ability to absorb water and nutrients from the soil.
Correct Answer:
B
— Water absorption
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Q. What is the primary role of chloroplasts in plant cells?
A.
Energy production
B.
Photosynthesis
C.
Cell division
D.
Respiration
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Solution
Chloroplasts are the organelles in plant cells where photosynthesis occurs, converting light energy into chemical energy.
Correct Answer:
B
— Photosynthesis
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Q. What is the primary role of xylem in plants? (2022)
A.
Transport of nutrients
B.
Transport of water
C.
Photosynthesis
D.
Storage of food
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Solution
Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transport of water
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Q. What is the process by which plants lose water vapor called? (2019)
A.
Transpiration
B.
Evaporation
C.
Condensation
D.
Photosynthesis
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Solution
Transpiration is the process where water vapor is lost from the plant, primarily through stomata in the leaves.
Correct Answer:
A
— Transpiration
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Q. What is the process by which plants lose water vapor through small openings in their leaves called? (2019)
A.
Transpiration
B.
Evaporation
C.
Condensation
D.
Photosynthesis
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Solution
Transpiration is the process of water vapor loss from plant leaves, which helps in nutrient transport and temperature regulation.
Correct Answer:
A
— Transpiration
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Q. What is the process by which plants lose water vapor to the atmosphere?
A.
Transpiration
B.
Evaporation
C.
Condensation
D.
Precipitation
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Solution
Transpiration is the process through which water vapor is lost from the plant to the atmosphere, primarily through stomata.
Correct Answer:
A
— Transpiration
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Q. What is the role of auxins in plant growth?
A.
Promote flowering
B.
Stimulate root growth
C.
Inhibit growth
D.
Promote cell elongation
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Solution
Auxins are plant hormones that promote cell elongation, which is crucial for growth and development in plants.
Correct Answer:
D
— Promote cell elongation
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Q. What is the role of xylem in plants?
A.
Transport of nutrients
B.
Transport of water
C.
Photosynthesis
D.
Storage of food
Show solution
Solution
Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transport of water
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Q. What is the term for the movement of water through a plant?
A.
Translocation
B.
Transpiration
C.
Absorption
D.
Diffusion
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Solution
Transpiration refers to the process of water movement through a plant and its evaporation from aerial parts, especially leaves.
Correct Answer:
B
— Transpiration
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Q. Which gas is primarily absorbed by plants during photosynthesis?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Hydrogen
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Solution
Plants absorb carbon dioxide from the atmosphere during photosynthesis, which is then used to produce glucose.
Correct Answer:
B
— Carbon dioxide
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Q. Which gas is primarily taken in by plants during photosynthesis?
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Hydrogen
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Solution
Plants primarily take in carbon dioxide during photosynthesis, which is used to produce glucose.
Correct Answer:
B
— Carbon Dioxide
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Q. Which hormone is primarily responsible for plant growth? (2023)
A.
Ethylene
B.
Auxin
C.
Gibberellin
D.
Abscisic acid
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Solution
Auxin is a plant hormone that promotes cell elongation and is crucial for growth.
Correct Answer:
B
— Auxin
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Q. Which hormone is responsible for the ripening of fruits?
A.
Gibberellins
B.
Ethylene
C.
Cytokinins
D.
Auxins
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Solution
Ethylene is a plant hormone that promotes the ripening of fruits and is involved in various aspects of plant growth and development.
Correct Answer:
B
— Ethylene
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Q. Which nutrient is essential for the synthesis of chlorophyll?
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Calcium
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Solution
Nitrogen is a key component of chlorophyll and is essential for its synthesis, thus playing a crucial role in photosynthesis.
Correct Answer:
A
— Nitrogen
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Q. Which of the following is a factor affecting the rate of photosynthesis?
A.
Temperature
B.
Soil type
C.
Wind speed
D.
Humidity
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Solution
Temperature is a key factor affecting the rate of photosynthesis, as it influences enzyme activity involved in the process.
Correct Answer:
A
— Temperature
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Q. Which of the following is a product of photosynthesis? (2021)
A.
Carbon Dioxide
B.
Glucose
C.
Oxygen
D.
Both Glucose and Oxygen
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Solution
Photosynthesis produces glucose and oxygen as products, using sunlight, carbon dioxide, and water.
Correct Answer:
D
— Both Glucose and Oxygen
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Q. Which of the following is NOT a macronutrient for plants?
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Iron
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Solution
Iron is considered a micronutrient, while nitrogen, phosphorus, and potassium are macronutrients essential for plant growth.
Correct Answer:
D
— Iron
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Q. Which part of the plant is primarily responsible for nutrient absorption?
A.
Leaves
B.
Stems
C.
Roots
D.
Flowers
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Solution
Roots are the primary organs for nutrient and water absorption from the soil, anchoring the plant and providing stability.
Correct Answer:
C
— Roots
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Q. Which part of the plant is primarily responsible for the uptake of water and minerals? (2020)
A.
Leaves
B.
Stems
C.
Roots
D.
Flowers
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Solution
Roots are specialized for absorbing water and nutrients from the soil, making them crucial for plant growth.
Correct Answer:
C
— Roots
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Q. Which pigment is primarily responsible for photosynthesis in plants?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Anthocyanins
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Solution
Chlorophyll a is the main pigment involved in photosynthesis, absorbing light energy to convert carbon dioxide and water into glucose and oxygen.
Correct Answer:
A
— Chlorophyll a
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Q. Which pigment is primarily responsible for the absorption of light in photosynthesis?
A.
Chlorophyll a
B.
Carotenoids
C.
Xanthophylls
D.
Chlorophyll b
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Solution
Chlorophyll a is the main pigment involved in photosynthesis, absorbing light primarily in the blue and red wavelengths.
Correct Answer:
A
— Chlorophyll a
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Q. Which pigment is primarily responsible for the green color of plants?
A.
Carotenoids
B.
Chlorophyll
C.
Xanthophyll
D.
Anthocyanins
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Solution
Chlorophyll is the pigment that gives plants their green color and is essential for photosynthesis, allowing plants to absorb light energy.
Correct Answer:
B
— Chlorophyll
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Q. Which pigment is responsible for the red color in plants? (2021)
A.
Chlorophyll
B.
Carotenoids
C.
Anthocyanins
D.
Xanthophylls
Show solution
Solution
Anthocyanins are pigments that give red, purple, and blue colors to many plants.
Correct Answer:
C
— Anthocyanins
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Q. Which pigment is responsible for the red color in some plants? (2019)
A.
Chlorophyll
B.
Carotenoids
C.
Anthocyanins
D.
Xanthophylls
Show solution
Solution
Anthocyanins are pigments that give red, purple, and blue colors to many plants, especially in fruits and flowers.
Correct Answer:
C
— Anthocyanins
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Q. Which process describes the movement of water from the roots to the leaves of a plant?
A.
Translocation
B.
Transpiration
C.
Absorption
D.
Capillarity
Show solution
Solution
Translocation refers to the movement of water and nutrients through the plant, specifically from the roots to the leaves.
Correct Answer:
A
— Translocation
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Q. Which process describes the movement of water from the roots to the leaves?
A.
Translocation
B.
Transpiration
C.
Absorption
D.
Capillarity
Show solution
Solution
Translocation refers to the movement of water and nutrients through the plant, specifically from the roots to the leaves.
Correct Answer:
A
— Translocation
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Showing 1 to 30 of 33 (2 Pages)
Plant Physiology MCQ & Objective Questions
Understanding Plant Physiology is crucial for students preparing for various exams in India. This branch of biology focuses on the functions and processes of plants, making it a significant topic for both school and competitive exams. Practicing MCQs and objective questions in Plant Physiology can enhance your exam preparation, helping you grasp important concepts and score better in your assessments.
What You Will Practise Here
Photosynthesis: Key processes and factors affecting it
Plant Hormones: Types, functions, and effects on growth
Transpiration: Mechanisms and significance in plants
Mineral Nutrition: Essential nutrients and their roles
Respiration in Plants: Aerobic and anaerobic processes
Water Relations: Osmosis, diffusion, and plant water uptake
Plant Growth and Development: Stages and influencing factors
Exam Relevance
Plant Physiology is frequently featured in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that test their understanding of processes like photosynthesis and transpiration, often presented in the form of diagrams or application-based scenarios. Familiarity with common question patterns, such as multiple-choice questions and assertion-reason type questions, will greatly benefit your exam performance.
Common Mistakes Students Make
Confusing the roles of different plant hormones
Misunderstanding the process of photosynthesis and its stages
Overlooking the significance of mineral nutrition in plant health
Neglecting the impact of environmental factors on transpiration
FAQs
Question: What are the main processes involved in photosynthesis?Answer: The main processes are light-dependent reactions and the Calvin cycle.
Question: How do plant hormones affect growth?Answer: Plant hormones regulate various growth processes, including cell elongation, flowering, and fruit development.
Now is the time to enhance your understanding of Plant Physiology! Dive into our practice MCQs and test your knowledge to excel in your exams. Remember, consistent practice is key to mastering this essential subject!