10th Standard Syllabus & Materials
10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Population, Transport, Communication and Trade Important Questions And Answers Study Material - QB365 Set C
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Population, Transport, Communication and Trade Important Questions And Answers Study Material - QB365 Set B
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Population, Transport, Communication and Trade Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Resources and Industries Important Questions And Answers Study Material - QB365 Set C
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Resources and Industries Important Questions And Answers Study Material - QB365 Set B
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Resources and Industries Important Questions And Answers Study Material - QB365 Set A
Published on: 19/10/2025
Download Tamil Nadu 10th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test
1.
__________ is found abundantly in liquid endosperm of coconut.
Auxin
Cytokinin
Gibberellins
Ethylene
2.
Pancreas acts as ________ gland.
exocrin
endocrin
both (a) & (b)
flying
3.
Which one is referred as “Master Gland”?
Pineal gland
Pituitary gland
Thyroid gland
Adrenal gland
4.
Which organ acts as both exocrine gland as well as endocrine gland
Pancreas
Kidney
Liver
Lungs
5.
Identify the exocrine gland
Pituitary gland
Adrenal gland
Salivary gland
Thyroid gland
6.
LH is secreted by
Adrenal gland
Thyroid gland
Anterior pituitary
Hypothalamus.
7.
Avena coleoptile test was conducted by
Darwin
N. Smit
Paal
F.W. Went
8.
Which one of the following hormones is naturally not found in plants.
2, 4-D
GA3
Gibberellin
IAA
9.
The hormone which has positive effect on apical dominance is:
Cytokinin
Auxin
Gibberellin
Ethylene
10.
Gibberellins cause:
Shortening of genetically tall plants
Elongation of dwarf plants
Promotion of rooting
Yellowing of young leaves
11.
Decreased secretion of thyroid hormones in the children leads to _________
12.
The growth and functions of thyroid gland is controlled by _________
13.
In the islets of Langerhans, beta cells secrete ________
14.
Calcium metabolism of the body is controlled by ________
15.
The hormone which has negative effect on apical dominance is _________.
16.
Gibberellins induce stem elongation in ______ plants.
17.
_______ causes stomatal closure.
18.
___________ is a gaseous hormone involved in abscission of organs and acceleration of fruit ripening.
19.
_______ causes cell elongation, apical dominance and prevents abscission.
20.
Estrogen is secreted by corpus luteum.
21.
Pituitary gland is divided into four lobes.
22.
Exopthalmic goiter is due to the over secretion of thyroxine.
23.
Ethylene retards senescence of leaves, flowers and fruits.
24.
Gibberellins cause parthenocarpy in tomato.
25.
A plant hormone concerned with stimulation of cell division and promotion of nutrient mobilization is cytokinin.
26.
Assertion: Diabetes mellitus is increases the blood sugar levels.
Reason: Insulin decreases the blood sugar levels.
Codes:
a) If both A and R are true and R is correct explanation of A
b) If both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) Both A and R are false
27.
Assertion: Pituitary gland is referred as “Master gland”.
Reason: It controls the functioning of other endocrine glands.
a) If both A and R are true and R is correct explanation of A
b) If both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) Both A and R are false
28.
Assertion: Application of cytokinin to marketed vegetables can keep them fresh for several days.
Reason: Cytokinins delay senescence of leaves and other organs by mobilisation of nutrients.
a) If both A and R are true and R is correct explanation of A
b) If both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) Both A and R are false
29.
How is corpus luteum formed? Name the hormones secreted by corpus luteum.
30.
Name the endocrine glands associated with kidneys.
31.
Which gland secretes digestive enzymes and hormones?
32.
Which hormone is secreted during emergency situation in man?
33.
Name the hormones which regulates water and mineral metabolism in man.
34.
What is the hormone responsible for the secretion of milk in female after child birth?
35.
Which hormone induces parthenocarpy in tomatoes?
36.
Write the name of a synthetic auxin.
37.
Which hormone promotes the production of male flowers in Cucurbits?
38.
ADH
39.
Growth hormone
40.
Parathormone
41.
Insulin
42.
Thyroxine
43.
Match Column I with Columns II and III
| Column I | Column II | Column III |
| 1) Auxin | a) Gibberella fujikuroi | (i) Abscission |
| 2) Ethylene | b) Coconut milk | (ii) Internodal elongation |
| 3) Abscisic acid | c) Coleoptile tip | (iii) Apical dominance |
| 4) Cytokinin | d) Chloroplast | (iv) Ripening |
| 5) Gibberellins | e) Fruits | (v) Cell division |
1.
(b)
Cytokinin
2.
(c)
both (a) & (b)
3.
(b)
Pituitary gland
4.
(a)
Pancreas
5.
(c)
Salivary gland
6.
(c)
Anterior pituitary
7.
(d)
F.W. Went
8.
(a)
2, 4-D
9.
(b)
Auxin
10.
(b)
Elongation of dwarf plants
11.
( )
cretinism
12.
( )
thyroid stimulating hormone (THS)
13.
( )
insulin
14.
( )
parathyroid hormone
15.
( )
cytokinins
16.
( )
Rice
17.
( )
Abscissic acid
18.
( )
Ethylene
19.
( )
Auxin
20.
False
Correct Statement : Progesterone is secreted by corpus luteum.
21.
False
Correct Statement : Pituitary gland is divided into two lobes.
22.
True
23.
False
Correct Statement : Ethylene hastens the senescence of leaves, flowers and fruits.
24.
True
25.
True
26.
b) If both A and R are true but R is not the correct explanation of A
27.
a) If both A and R are true and R is correct explanation of A
28.
a) If both A and R are true and R is correct explanation of A
29.
Progesterone from the corpus luteum that is formed in the ovary from the ruptured follicle during ovulation. Progesterone is the hormone secreted by luteum.
30.
Posterior lobe (Neurohypophysis) of pituitary gland.
31.
Pancreas.
32.
(i) Epinephrine (Adrenaline)
(ii) Norepinephrine (Noradrenaline)
(iii) They are together called as "Emergency hormones" secreted during emergency situation in man.
33.
Growth hormone, Thyroid hormone, Parathormone and Glucocorticoids.
34.
Prolactin (PRL) is also called lactogenic hormone, initiates development of mammary glands during pregnancy and stimulates the production of milk after child birth.
35.
Gibberellin induces parthenocarpy in tomatoes.
36.
2,4 - Dichlorophenoxy Acetic acid ( (2,4 - D)
37.
Gibberellin promote the production of male flowers in Cucurbits.
38.
Diabetes insipidus
39.
Acromegaly
40.
Tetany
41.
Diabetes mellitus
42.
Simple goitre
43.
| Column I | Column II | Column III |
| 1) Auxin | c) Coleoptile tip | (iii) Apical dominance |
| 2) Ethylene | e) Fruits | (iv) Ripening |
| 3) Abscisic acid | d) Chloroplast | (i) Abscission |
| 4) Cytokinin | b) Coconut milk | (v) Cell division |
| 5) Gibberellins | a) Gibberella fujikuroi | (ii) Internodal elongation |
10th Standard Syllabus & Materials
10th Standard
Tamilnadu 10th Standard Social Science GEO - Climate and Natural Vegetation of India Important Questions And Answers Study Material - QB365 Set C
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - Climate and Natural Vegetation of India Important Questions And Answers Study Material - QB365 Set B
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - Climate and Natural Vegetation of India Important Questions And Answers Study Material - QB365 Set A
NEW10th Standard
Tamilnadu 10th Standard Social Science GEO - India - Location, Relief and Drainage Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
