Class 10 Science Chapter 6 MCQ Control and Coordination
MCQ on Control and Coordination Class 10
Select And Write The Most Appropriate Option :
Question 1.
Which of the following is a plant hormone?
A) Insulin
B) Oestrogen
C) Thyroxine
D) Cytokinins
Answer:
D) Cytokinins
Question 2.
The growth of tendril in pea plant is due to
A) effect of light
B) effect of gravity
C) rapid cell division in tendrillar cells that are away from the support.
D) rapid cell division in tendrillar cells in contact with the support.
Answer:
C) rapid cell division in tendrillar cells that are away from the support.
Question 3.
The movement of sunflower in accordance with the path of sun is due to
A) Phototropism
B) Geotropism
C) Chemotropism
D) Hydrotropism
Answer:
A) Phototropism
Question 4.
The growth of pollen tube towards ovules is due to
A) hydrotropism
B) chemotropism
C) geotropism
D) phototropism
Answer:
B) chemotropism
Question 5.
The hormone which occurs in adverse conditions is
A) Cytokinins
B) Auxins
C) Gibberellins
D) Abscisic acid
Answer:
D) Abscisic acid
Question 6.
A gaseous hormone which helps in ripening of fruits
A) Gibberellins
B) Cytokinins
C) Ethylene
D) Auxins
Answer:
C) Ethylene
Question 7.
Closing of stomata is the function of
A) Abscisic acid
B) Auxin
C) Gibberellin
D) Ethylene
Answer:
A) Abscisic acid
Question 8.
The following plant shows response to phototropism
A) Mango
B) Sunflower
C) Eucalyptus
D) Cashew nut
Answer:
B) Sunflower
Question 9.
The plant part which exhibit negative geotropism is
A) stem
B) root
C) leaf
D) flower
Answer:
A) stem
Question 10.
Elongation of stem is due to the action of
A) Abscisic acid
B) Auxin
C) Ethylene
D) Gibberellin
Answer:
D) Gibberellin
Question 11.
Ethylene is responsible for
A) Opening of stomata
B) Ripening of fruits
C) Braking seed dormancy
D) None
Answer:
B) Ripening of fruits
Question 12.
Abscisic acid is responsible for
A) Cell elongation
B) Promote cell division
C) Promote fall of mature leaves and fruits
D) Elongation of stems
Answer:
C) Promote fall of mature leaves and fruits
Question 13.
Hydrotropism means
A) Movement of root towards water
B) Movement of stem towards light
C) Bending of stem towards light
D) Growing of root into the soil
Answer:
A) Movement of root towards water
Question 14.
Growing of plant tendril towards support and wind around is
A) Phototropism
B) Thigmotropism
C) Chemotropism
D) Geotropism
Answer:
B) Thigmotropism
Question 15.
Folding up of leaves of Mimosa pudica when touching is the type of response called
A) Thigmonasty
B) Photonasty
C) Phototropism
D) Negatively phototropism
Answer:
A) Thigmonasty
Question 16.
The scientific name of touch me not plant
A) Pongamia Glabra
B) Pithacalobium tulsi
C) Murraya Koenigii
D) Mimosa pudica
Answer:
D) Mimosa pudica
Question 17.
A gardener wants large dahlias, he should use the hormone along with nutrients.
A) Auxin
B) Gibberellin
C) Ethylene
D) Cytokinins
Answer:
D) Cytokinins
Question 18.
Phytohormones are present in
A) Animals
B) Plants
C) Sponges
D) All the above
Answer:
B) Plants
Question 19.
The hormone that can be used after cutting the apex or tip of plants so that there are several lateral buds develops
A) Auxin
B) Gibberellin
C) Cytokinin
D) Ethylene
Answer:
A) Auxin
Question 20.
Root initiation is promoted by
A) Cytokinin
B) Gibberellin
C) Auxin
D) Abscisic acid
Answer:
A) Cytokinin
Question 21.
Abscission layers separate these parts from the plant.
A) leaves
B) fruits, flowers
C) leaves, fruits
D) leaves, flowers
Answer:
C) leaves, fruits
Question 22.
Proposal of plant growth substances was first put forward by
A) Charles Darwin
B) Francis Darwin
C) I.W.Went
D) Haeckel
Answer:
B) Francis Darwin
Question 23.
Germination of seeds : : Gibberellins ; Ripening of fruits : : _______
A) Auxin
B) Cytokinin
C) ABA
D) Ethylene
Answer:
D) Ethylene
Question 24.
| Phytohormone | Function |
| Abscisic Acid | Closing of stomata |
| Cytokinins | ? |
A) Cell elongation
B) Ripening of fruits
C) Breaking of dormancy
D) Promote cell division
Answer:
D) Promote cell division
Question 25.
Identify the mismatched pair.
1) Roots – Positively geotropic
2) Stem – Negatively geotropic
3) Sunflower – Thigmonasty
A) 1,2
B) 1,3
C) 2 only
D) 3 only
Answer:
D) 3 only
Question 26.
The correct answer is
1. Abscisic acid (a) a) Ripening of fruit
2. Cytokinins (b) b) Closing of stomata
3. Gibberellins (c ) c) Elongation of stem
A) 1 is correct
B) 3 is correct
C) 2 is correct
D) 1,2,3 are correct
Answer:
B) 3 is correct
Question 27.
Leaf movement in Mimosa helps in
A) Reduce photosynthesis
B) Protect from grazers
C) Regulate it’s growth
D) Regulate phytohormones
Answer:
B) Protect from grazers
Question 28.
In humans, the life processes are controlled and regulated by
A) reproductive and endocrine system.
B) respiratory and nervous system.
C) endocrine and digestive system.
D) nervous and endocrine system.
Answer:
D) nervous and endocrine system.
Question 29.
Junction between two neurons is called
A) Cell junction
B) Neuro muscular junction
C) Neural joint
D) Synapse
Answer:
D) Synapse
Question 30.
In a neuron, conversion of electrical signal to a chemical signal occurs at/in
A) cell body
B) axonal end
C) dendritic end
D) axon
Answer:
B) axonal end
Question 31.
In a synapse chemical signal is transmitted from
A) dendritic end of one neuron to axonal end of another neuron.
B) axon to cell body of the same neuron.
C) cell body to axonal end of the same neuron.
D) axonal end of one neuron to dendritic end of another neuron.
Answer:
D) axonal end of one neuron to dendritic end of another neuron.
Question 32.
Electrical impulse travels in a neuron from
A) dendrite → axon → axonal end → cell body.
B) cell body → dendrite →axon → axonal end.
C) dendrite → cell body → axon → axonal end.
D) axonal end → axon → cell body → dendrite.
Answer:
C) dendrite → cell body → axon → axonal end.
Question 33.
The brain is responsible for
A) thinking
B) regulating the heart beat
C) balancing the body
D) all the above
Answer:
D) all the above
Question 34.
A part of the neuron which is generally called as nerve fibre is
A) Dendrites
B) Myelin sheath
C) Axon
D) Cyton
Answer:
C) Axon
Question 35.
Master gland in the body
A) Adrenal
B) Thyroid
C) Parathyroid
D) Pituitary
Answer:
D) Pituitary
Question 36.
Voluntary actions are controlled by
A) Cerebrum
B) Cerebellum
C) Spinal cord
D) Medulla oblongata
Answer:
B) Cerebellum
Question 37.
The gland which acts as both endocrine and exocrine gland is
A) Thyroid
B) Parathyroid
C) Pancreas
D) Liver
Answer:
C) Pancreas
Question 38.
Iodine is necessary for the secretion of this hormone.
A) Adrenalin
B) Thyroxine
C) Paratharmone
D) Somatotropin
Answer:
B) Thyroxine
Question 39.
Doctors give insulin injections to patients suffereing from
A) Dwarfism
B) Diabetes mellitus
C) Diabetes Insipidus
D) Tetancy
Answer:
B) Diabetes mellitus
Question 40.
Feed back mechanism helps in
A) Regulating the amount of hormones released.
B) Decreasing amount hormones released.
C) Increasing the amount of hormones released.
D) All the above
Answer:
A) Regulating the amount of hormones released.
Question 41.
The use of iodised salt is recommended to prevent
A) Dwarfism
B) Diarrhoea
C) Goitre
D) Cretenism
Answer:
C) Goitre
Question 42.
Ravi got anger; The hormone responsible for his anger is
A) Thyroxine
B) Adrenalin
C) Somatotropin
D) None of the above
Answer:
B) Adrenalin
Question 43.
Which part of the brain plays major role in Reflex are ?
A) Brain
B) Cerebellum
C) Diencephalon
D) Spinal cord
Answer:
D) Spinal cord
Question 44.
The part of the brain helps to maintain posture and equilibrium ?
A) Cerebrum
B) Cerebellum
C) Mid brain
D) Diencephalon
Answer:
B) Cerebellum
Question 45.
Thyroxine is responsible for
A) General growth rate and metabolism
B) Growth of bones and testis
C) Growth of the uterus and skeleton of the pelvis.
D) Growth of testis and uterus
Answer:
A) General growth rate and metabolism