Chemical Control and Coordination MCQ Questions. We covered all the Chemical Control and Coordination MCQ Questions along with answers in this post for free so that you can practice well for the exam.
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MCQ on Chemical Control and Coordination for Students
Prominent action of Gibberellin is to :
1. increase the number of buds
2. increase the size of leaves
3. make dwarf plants tall
4. making tall plants taller
Option 3 – make dwarf plants tall
Cytokinins have special function of promoting :
1. the number of flowers
2. the amount of auxins
3. cell division
4. cell destructions
Option 3 – cell division
Shedding of the leaves and fruits is due to the hormone :
1. Indole acetic acid
2. Naphthalene acetic acid
3. Gibberellins
4. Abscisic acid
Option 4 – Abscisic acid
Dicotyledonous weeds are destroyed by a chemical called :
1. Indole acetie acid
2. 2,4-D
3. Abscisic acid
4. Naphthalene acetic acid
Option 2 – 2,4-D
Water loss from plants is prevented by ……hormone :
1. Gibberellins
2. NAA
3. Indole acetic acid
4. ABA
Option 4 – ABA
If apex of a coleoptile is removed and replaced change you observe is :
1. it will not further grow
2. it gives new branches
3. it grows normally
4. it does not show any changes
Option 2 – it gives new branches
The property of responding to changes in the environment is called
1. Growth
2. Germination
3. Co-ordination
4. Irritability
Option 4 – Irritability
Brain and spinal cord are parts of :
1. sympathetic nervous system
2. para sympathetic nervous system
3. Peripheral nervous system
4. Central nervous system
Option 4 – Central nervous system
The part of the brain that has glial cells :
1. Pia matter
2. Dura matter
3. arachnoid membrane
4. grey matter
Option 4 – grey matter
The outer membrane that covers the brain is :
1. myelin sheath
2. dura matter
3. arachnoid membrane
4. Grey matter
Option 4 – grey matter
The fluid that flows between the outer and middle membranes covering brain is :
1. Lymph
2. plasma
3. Cerebro – spinal fluid
4. Serum
Option 3 – Cerebro – spinal fluid
The brain and spinal cord are covered by 3 membranes. The middle one is :
1. dura matter
2. pia matter
3. arachnoid membrane
4. pleura
Option 3 – arachnoid membrane
The inner most membrane that covers the brain is :
1. pleura
2. dura matter
3. pia matter
4. arachnoid membrane
Option 2 – dura matter
The part neuron which is generally called as nerve :
1. dendrites
2. myelin sheath
3. axon
4. cyton
Option 3 – axon
The structures of neuron that are arranged in the form of a tree with branches :
1. axon
2. cyton
3. dendrites
4. myelin sheath
Option 3 – dendrites
Nerves that carry impulses from brain or spinal cord to effector organs are :
1. sensory nerves
2. afferent nerves
3. dendrites
4. efferent nerves
Option 4 – efferent nerves
Nerves that carry impulses from sense organs to brain or spinal cord are :
1. dendrites
2. motor nerves
3. efferent nerves
4. afferent nerves
Option 4 – afferent nerves
In diseases like polio, the cells that get destroyed by virus are :
1. monocytes
2. erythrocytes
3. motor neurons
4. sensory neurons
Option 3 – motor neurons
Cranial nerve that controls heart beat :
1. Precaval
2. Post caval
3. aorta
4. vagus
Option 4 – vagus
The growing region of root is :
1. tip
2. below the tip
3. in between nodes
4. lower part of stem
Option 2 – below the tip
Auxins in plants are synthesized at :
1. nodes
2. petiole
3. meristems
4. internodes
Option 3 – meristems
If a terminal bud of a plant is removed :
1. plants grow to normal height
2. lateral branches grow
3. plant increases in height
4. roots do not develop
Option 2 – lateral branches grow
Apical dominance means :
1. terminal bud growing nonstop
2. terminal bud suppressing growth of lateral buds
3. removal of the apex of the stem
4. terminal and lateral branches grow equally
Option 2 – terminal bud suppressing growth of lateral buds
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