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Plant Hormones and Their Role in Flowering mcq for Students
During photosynthesis, which gas is released by plants?
A) Nitrous oxide
B) Carbon dioxide
C) Nitrogen
D) Oxygen
Option d – Oxygen
The process in which water droplets appear on the edges of leaves is called:
A) Pressure gradient
B) Plasmolysis
C) Guttation
D) Translocation
Option c – Guttation
Identify the mismatched pair among the following plant tropisms:
A) Shoot: Positively phototropic
B) Root: Positively geotropic
C) Pollen tube: Chemotropic
D) Flower: Hydrotropic
Option d – Flower: Hydrotropic
A student wants to enhance cell division in plants. Which hormone should be recommended?
A) Abscisic Acid
B) Gibberellins
C) Cytokinin
D) Auxin
Option c – Cytokinin
Which mineral is necessary for the thyroid gland to synthesize thyroxin?
A) Sodium chloride
B) Potassium chloride
C) Cholesterol
D) Iodine
Option d – Iodine
Which plant hormone slows down or inhibits growth?
A) Cytokinins
B) Auxins
C) Gibberellins
D) Abscisic Acid
Option d – Abscisic Acid
Which of the following is classified as a plant hormone?
A) Cytokinin
B) Oestrogen
C) Thyroxin
D) Insulin
Option a – Cytokinin
When maize seeds germinate, the radicle grows downward and the coleoptile grows upward. This behavior is known as:
A) Hydrotropism
B) Phototropism
C) Geotropism
D) Chemotropism
Option c – Geotropism
Upward movement of plant shoots can be described as:
A) Positively chemotropic
B) Negatively phototropic
C) Negatively geotropic
D) Positively hydrotropic
Option c – Negatively geotropic
Which hormone controls the development of female sexual characteristics?
A) Estrogen
B) Prolactin
C) Progesterone
D) Oxytocin
Option a – Estrogen
Which hormone is responsible for increasing the heart rate in mammals?
A) Insulin
B) Melatonin
C) Adrenaline
D) Thyroxine
Option c – Adrenaline
How do xerophytic plants adapt to survive in dry and hot environments?
A) Developing a thick waxy layer on leaves
B) Opening stomata only during the day
C) Using photosynthetic roots
D) Producing leaves only during cooler seasons
Option a – Developing a thick waxy layer on leaves
Which of the following is not considered a plant hormone?
A) Abscisic Acid
B) Gibberellins
C) Thyroxine
D) Auxins
Option c – Thyroxine
A deficiency of parathyroid hormone combined with reduced calcium levels in the blood can result in which disorder?
A) Malaria
B) Anaemia
C) Diabetes
D) Hypocalcemia
Option d – Hypocalcemia
Which gland produces cortisol, commonly called the stress hormone?
A) Pituitary gland
B) Thyroid gland
C) Pineal gland
D) Adrenal gland
Option d – Adrenal gland
Which hormone from the brain controls the sleep and wake cycle?
A) Insulin
B) Melatonin
C) Aldosterone
D) Oxytocin
Option b – Melatonin
Which organelle is responsible for producing and processing fats and steroid hormones?
A) Smooth endoplasmic reticulum
B) Mitochondrion
C) Golgi apparatus
D) Nucleus
Option a – Smooth endoplasmic reticulum
Somatotropin is another name for:
A) Digestive system
B) Laughing gas
C) Growth hormone
D) Tear gas
Option c – Growth hormone
Which element is essential for the thyroid gland to produce thyroxine?
A) Iron
B) Iodine
C) Selenium
D) Chromium
Option b – Iodine
Which hormone helps the body handle stress effectively?
A) Serotonin
B) Testosterone
C) Calcitonin
D) Melatonin
Option a – Serotonin
Which hormone causes milk to be released from mammary glands during breastfeeding?
A) Estrogen
B) Oxytocin
C) Prolactin
D) Progesterone
Option b – Oxytocin
Which of the following is NOT considered a plant hormone?
A) Ethylene
B) Abscisic Acid
C) Gibberellins
D) Prolactin
Option d – Prolactin
Glucagon, a peptide hormone, is secreted by which organ?
A) Pancreas
B) Hypothalamus
C) Adrenals
D) Pituitary glands
Option a – Pancreas
The human atria secrete which peptide hormone that plays an important role in blood pressure regulation?
A) ADH
B) CCK
C) ANF
D) GIP
Option c – ANF
Which hormone is called the “hunger hormone” because it stimulates appetite and promotes fat storage?
A) Insulin
B) Resistin
C) Leptin
D) Ghrelin
Option d – Ghrelin
How does growth hormone function in the body?
A) Always inhibits growth
B) Always promotes growth
C) Rarely promotes growth
D) Sometimes promotes growth and sometimes inhibits growth
Option d – Sometimes promotes growth and sometimes inhibits growth
Which gland releases human growth hormone?
A) Thyroid gland
B) Anterior pituitary
C) Pancreas
D) Posterior pituitary
Option b – Anterior pituitary
What are phytohormones?
A) Chemical regulators produced by plants that control physiological processes
B) Substances used to measure plant growth
C) Chemicals for peeling plant tissues
D) Compounds that protect plants from diseases
Option a – Chemical regulators produced by plants that control physiological processes
From which sources do plants obtain the nutrients required for growth?
A) Soil only
B) Soil, water, and air
C) Soil and air only
D) Soil and water only
Option b – Soil, water, and air
The process by which plants release water vapor through their leaves is called:
A) Transportation
B) Creepers
C) Transpiration
D) Venation
Option c – Transpiration
What occurs to guard cells when they absorb water?
A) Stomatal pores open
B) Guard cells close
C) Stomatal pores close
D) Stomatal pores shrink
Option a – Stomatal pores open
Which plant hormone promotes elongation of stems by stimulating cell growth?
A) Auxin
B) Ethylene
C) Gibberellin
D) Cytokinin
Option a – Auxin
Plants that are adapted to bright sunlight are called:
A) Heliophytes
B) Xerophytes
C) Protophytes
D) Neophytes
Option a – Heliophytes
Which pigment in leaves captures Light energy for photosynthesis?
A) Chlorophyll
B) Cladophyl
C) Cytoplasm
D) Xanthophyll
Option a – Chlorophyll
The broad, green flat part of a leaf is called:
A) Petiole
B) Lamina
C) Midrib
D) Veins
Option b – Lamina
Which of the following is NOT a key function of roots in plants?
A) Transporting Food to other plant parts
B) Anchoring the plant in the soil
C) Absorbing water from the soil
D) Absorbing Minerals from the soil
Option a – Transporting Food to other plant parts
We covered all the Plant Hormones and Their Role in Flowering mcq above in this post for free so that you can practice well for the exam.
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Also, check out:
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- Theoretical and Experimental Plant Physiology
- Introduction of Plant Physiology
