Plant Physiology MCQs-7

Plant Physiology MCQs-7
Multiple Choice Questions (MCQs)
[Plant Physiology MCQs Homepage]

1. The physiological phenomenon in which the growing apical bud suppresses the growth of axillary buds is known as _______

 Photoperiodism

 Apical dominance

 Senescence

 Vernalization

2. CAM plants open stomata mainly during ___________

 Morning

 Noon

 Daytime

 Night

3. The Calvin cycle occurs in the ____________

 Stroma

 Thylakoid

 Cytoplasm

 Ribosome

4. The hormone responsible for leaf abscission is primarily _________

 Cytokinin

 Auxin

 Ethylene

 Gibberellin

5. The green pigment involved in photosynthesis is ________

 Chlorophyll

 Anthocyanin

 Carotene

 Xanthophyll

6. In a vascular plant, the primary sites of auxin biosynthesis are the ________________

 Xylem vessels and phloem sieve tubes

 Root hairs and root caps

 Mature leaves and leaf sheaths

 Young shoot tips, developing leaves, and embryos

7. The classical experiments on phototropism led to the discovery of the first plant hormone, which was later identified as ___________

 Cytokinin

 Ethylene

 Gibberellin

 Auxin

8. The plant hormone abscisic acid (ABA) is often referred to as the “stress hormone” because its concentration in plant tissues increases significantly in response to _____

 Low temperature

 Water stress

 High nitrogen supply

 High rainfall

9. The primary naturally occurring auxin responsible for regulating growth and development in plants is ______

 IBA (Indole-3-butyric acid)

 NAA (Naphthaleneacetic acid)

 IAA (Indole-3-acetic acid)

 2,4-D (2,4-Dichlorophenoxyacetic acid)

10. Due to their ability to disrupt normal growth patterns in plants at high concentrations, synthetic auxins like are commercially formulated and used as ________

 Fertilizers

 Insecticides

 Herbicides

 Fungicides

 Loading …

Question 1 of 10

Plant Physiology MCQs-7

Plant Physiology MCQs

[Test 1]	[Test 2]	[Test 3]	[Test 4]
[Test 5]	[Test 6]	[Test 7]	[Test 8]
[Test 9]	[Test 10]	[Test 11]	[Test 12]

Note: These tests are for preparation purposes only. Choices may differ depending on the scientific material consulted. 

[Test 13]	[Test 14]	[Test 15]	[Test 16]
[Test 17]	[Test 18]	[Test 19]	[Test 20]

Return to [MCQ Homepage] [Plant Physiology MCQs Homepage]

Multiple Choice Questions (MCQs) for Professional Test Preparation

Use of Multiple-choice questions (MCQs) is among the proven strategies to test your knowledge and improve your skills for relevant exams. These Expert-Approved MCQs cover various aspects of the fundamentals of agriculture, crop plants, production technologies, dietary and nutritional importance and industrial processes. Moreover, key questions about soil, irrigation, pests, diseases and other aspects of crop management are also included. Return to [MCQ Homepage]

Other Multiple Choice Questions (MCQ) Tests for Professional Exam Preparation

[General Agriculture MCQs]	[Agronomy MCQs]	[Entomology MCQs]
[Environmental Science MCQs]	[Soil Science MCQs]	[Horticulture MCQs]
[Plant Breeding and Genetics MCQs]	[Forestry, Range Management & Wildlife MCQs]	[Biology MCQs]
[General Knowledge MCQs]	[Botany MCQs]	[Zoology MCQs]
[Plant Pathology MCQs]	[Seed Science MCQs]	[Crop and Environment MCQs]

Return to [MCQ Homepage]

Plant Physiology MCQs

Plant physiology is the branch of botany focused on how plants function at cellular, biochemical, and organismal levels. It investigates crucial processes—photosynthesis, nutrient uptake, respiration, hormone action, and water transport—essential for plant growth, development, and environmental adaptation.

Key areas within the study of plant physiology include

1. Photosynthesis
2. Respiration
3. Transpiration
4. Water and mineral uptake
5. Transport (xylem and phloem)
6. Growth and development
7. Hormonal regulation
8. Nutrient assimilation
9. Stress physiology
10. Reproductive physiology

Photosynthesis: Plants capture light energy to convert carbon dioxide and water into glucose for energy,.
Water and Nutrient Transport: The xylem moves water upward from roots, while phloem transports nutrients throughout the plant.
Growth and Development: Study of how phytohormones regulate growth, seed germination, and response to environmental stressors like heat or drought.
Environmental Physiology: Understanding how plants adapt to their environment, such as managing water loss through stomatal closing

Plant Physiology MCQs, Photosynthesis MCQs, Nutrient Uptake MCQs, Transpiration and Respiration MCQs, Plant Growth Regulators