Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Give full form of 2-4-D
The full form of 2,4-D is 2,4-dichlorophenoxyacetic acid. It is a synthetic auxin, which is commonly used as a herbicide to control weeds, particularly broadleaf weeds.
Which of the following stimulates growth in the internode region ?
Gibberellins (GA) are plant hormones that play a key role in stimulating growth in the internode region. They promote cell elongation, division, and expansion, which leads to an increase in the length of the internodes.
Oat - coleoptile test (coleoptile-test) is conducted for which hormone ?
The oat coleoptile test is conducted to study the effects of Indole Acetic Acid (IAA), which is a naturally occurring auxin in plants. This test helps in understanding the role of IAA in promoting cell elongation.
Gibberrelin participate in which of the following process?
Gibberellins participate in multiple processes including removal of seed dormancy, developing seedless fruits, and growth of internodes. Therefore, the correct answer is 'All of the above'.
Which is the correct sequence for different phases of growth?
The correct sequence of growth phases in plants starts with cell formation (cell division), followed by cell elongation, and finally cell differentiation. This sequence ensures that new cells are produced, they grow to an appropriate size, and then they specialize to perform specific functions.
What is the required temperature for growth in most of the plants?
The optimal temperature range for the growth of most plants is between 20°C and 30°C. Within this range, the enzymatic activities necessary for growth processes are most efficient. Temperatures outside this range can slow down or inhibit plant growth.
Zeatin is an example of
Zeatin is a type of cytokinin, a class of plant hormones that promote cell division and growth. Cytokinins, including zeatin, play a crucial role in cell differentiation, shoot initiation, and delay of leaf senescence.
Which of the following physiological process performed by gibberrelic acid?
Gibberellic acid (GA) is known for promoting the growth in size of stem and root formation. It helps in the elongation of stems, breaking seed dormancy, and other growth-related processes in plants.
Which of the following is used to enhance colour of fruits and more juice in fruits unnaturally?
Ethylene gas is used to enhance the color of fruits and increase the juice content unnaturally. It is a natural plant hormone that regulates fruit ripening and other processes related to growth and development.
Which hormone is responsible for apical dominance?
Auxin is a plant hormone that plays a key role in apical dominance, which is the phenomenon where the main, central stem of the plant is dominant over (i.e., grows more strongly than) other side stems. Auxins are produced in the apical meristem of the plant and inhibit the growth of lateral buds, ensuring that the plant grows taller rather than wider.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Botany question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.