{"id":18039,"date":"2022-05-27T01:30:55","date_gmt":"2022-05-26T20:00:55","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=18039"},"modified":"2022-05-18T15:28:40","modified_gmt":"2022-05-18T09:58:40","slug":"mcq-questions-for-class-11-biology-chapter-15","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/mcq-questions-for-class-11-biology-chapter-15\/","title":{"rendered":"MCQ Questions for Class 11 Biology Chapter 15 Plant Growth and Development with Answers"},"content":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 11 Biology Chapter 15 Plant Growth and Development with Answers Pdf free download is available here. MCQ Questions for Class 11 Biology with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Plant Growth and Development Class 11 MCQs Questions with Answers and assess their preparation level.<\/p>\n

Plant Growth and Development Class 11 MCQs Questions with Answers<\/h2>\n

Solving the Plant Growth and Development Multiple Choice Questions of Class 11 Biology Chapter 15 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Plant Growth and Development Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 15 Biology Class 11 and cross-check your answers during preparation.<\/p>\n

I. Select the correct answer from the following questions:<\/span><\/p>\n

Question 1.
\nThree important growth promotor hormones in plants are
\n(a) Auxins, gibberellins and ethylene
\n(b) Auxins, gibberellins and cytokinins
\n(c) Ethylene, abscisic acid and cytokinins
\n(d) Gibberellins, cytokinins and abscisic acid<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Auxins, gibberellins and cytokinins<\/p>\n<\/details>\n

\n

Question 2.
\nFirst hormone isolated from human urine suffering from pellagra disease was
\n(a) Gibberelins
\n(b) Auxins
\n(c) Cytokinins
\n(d) Abscisic acid<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Auxins<\/p>\n<\/details>\n

\n

Question 3.
\nIndole 3 acetic acid (IAA) is a naturally occuring plant hormone called
\n(a) Gibberellins
\n(b) Auxins
\n(c) Cytokinins
\n(d) Abscisic acid<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Auxins<\/p>\n<\/details>\n

\n

Question 4.
\nAuxins hormone was first discoverd by
\n(a) Kogletal
\n(b) Went
\n(c) Darwin
\n(d) Boysen Jenson<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Went<\/p>\n<\/details>\n

\n

Question 5.
\nAuxin is synthesised in the apical meristems from amino acid
\n(a) Isoleucine
\n(b) Methionine
\n(c) Niacin
\n(d) Tryptophan<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Tryptophan<\/p>\n<\/details>\n

\n

Question 6.
\nGrowth regulator which is known to promote cell division in vascular cambium is
\n(a) IAA
\n(b) ABA
\n(c) Cytokinins
\n(d) Ethylene<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) IAA<\/p>\n<\/details>\n

\n

Question 7.
\nGrowth regultor which is known to induce parthenocarphy is plants is called
\n(a) Gibberellins
\n(b) ABA
\n(c) Ethylene
\n(d) Cytokinins<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Gibberellins<\/p>\n<\/details>\n

\n

Question 8.
\nThe formation of seedless fruits without the act of fertilization is known as
\n(a) Parthenocarpy
\n(b) Pseudocarpy
\n(c) Apomixis
\n(d) Parthenogenesis<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Parthenocarpy.<\/p>\n<\/details>\n

\n

Question 9.
\nThe major sites of gibberellin production in plants are
\n(a) Embryos
\n(b) Roots
\n(c) Young leaves
\n(d) All of these<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) All of these<\/p>\n<\/details>\n

\n

Question 10.
\nGibberellin was isolated in pure form by
\n(a) Brian et al
\n(b) Went
\n(c) Yabuta
\n(d) Kurosava<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Brian et al<\/p>\n<\/details>\n

\n

Question 11.
\nInternodal elongation of genetically dwarf plants in known as
\n(a) Bolting
\n(b) Elongation
\n(c) Etiolation
\n(d) None of these<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Bolting<\/p>\n<\/details>\n

\n

Question 12.
\nCytokinins are in nature
\n(a) Acidic
\n(b) Neutral
\n(c) Basic
\n(d) All of these<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Basic<\/p>\n<\/details>\n

\n

Question 13.
\nCytokinins help in promoting
\n(a) Cell division
\n(b) Stem elongation
\n(c) Cell enlargement
\n(d) Parthenocarpy<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Cell division<\/p>\n<\/details>\n

\n

Question 14.
\nThe first natural cytokinins obtained from unripe maize grains is known as
\n(a) Indole 3-acetic acid
\n(b) ABA
\n(c) Zeatin
\n(d) Kinetin<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Zeatin<\/p>\n<\/details>\n

\n

Question 15.
\nTwo important growth inhibitors in plants are
\n(a) Ethylene and abscisic acid
\n(b) Auxins and abscisic acid
\n(c) Gibberellins and abscisic acid
\n(d) Cytokinins and ethylene<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Ethylene and abscisic acid<\/p>\n<\/details>\n

\n

Question 16.
\nName the plant hormone which hastens ripening of fruits and colour development is citrus, apple, mango, banana, etc.
\n(a) Gibberellin
\n(b) Ethylene
\n(c) ABA
\n(d) IAA<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Ethylene<\/p>\n<\/details>\n

\n

Question 17.
\nAbscisic acid (ABA) was first isolated from cotton balls by
\n(a) Addicot et al
\n(b) Letham et al
\n(c) Brian et al
\n(d) Kurosava<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Addicot et al<\/p>\n<\/details>\n

\n

Question 18.
\nSeeds which are influenced by light for germination are known as
\n(a) Neoblastic
\n(b) Hoioblastic
\n(c) Photoblastic
\n(d) All of these<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Photoblastic<\/p>\n<\/details>\n

\n

Question 19.
\nThe cold induced stimulus used in vernalization is
\n(a) Vernalin
\n(b) Carotene
\n(c) Ethylene
\n(d) Florigen<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Vemalin<\/p>\n<\/details>\n

\n

Question 20.
\nWhen dark period of short day plants is interrupted by a brief exposure to light the plant will-
\n(a) flower immediately
\n(b) give more flowers
\n(c) not flower at all
\n(d) change into long day plant<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Not flower at all<\/p>\n<\/details>\n

\n

Question 21.
\nW’hich is a long day plant
\n(a) Xanthium
\n(b) Wheat
\n(c) Soyabean
\n(d) Tobacco<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Wheat<\/p>\n<\/details>\n

\n

Question 22.
\nWhich can replace the requirement of vernalisation
\n(a) Gibberellins
\n(b) Auxin
\n(c) Cytokinin
\n(d) Ethylene<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Gibberellins<\/p>\n<\/details>\n

\n

Question 23.
\nArtificial ripening of fruit of accomplished by treatment with
\n(a) Zeatin
\n(b) NaCl
\n(c) IAA
\n(d) Ethylene gas<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Ethylene gas<\/p>\n<\/details>\n

\n

Question 24.
\nWhich is a short day plant?
\n(a) Glycine max
\n(b) Triticum aestivum
\n(c) Raphanus sativus
\n(d) Daucus carota<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Glycine max<\/p>\n<\/details>\n

\n

Question 25.
\nThe period of growth is generally divided into
\n(a) Meristematic phase
\n(b) Elongation phase
\n(c) Maturation phase
\n(d) All of these phases<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) All of these phases<\/p>\n<\/details>\n

\n

II. Fill in the blanks:<\/span><\/p>\n

Question 1.
\n…………. is regarded as one of the most fundamental and conspicuous characteristics of a living being.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Growth<\/p>\n<\/details>\n

\n

Question 2.
\nPlant growth is ……………. because plants retain die capacity for unlimited growth throughout their life.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Unique<\/p>\n<\/details>\n

\n

Question 3.
\nThis form of growth wherein new cells are always being added to the plant body by the activity of the meristem is called the …………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: open form of growth<\/p>\n<\/details>\n

\n

Question 4.
\nGrowth is, therefore, measured by a variety of parameters some o,r which are ……………… dry weight; length; area volume and cell number.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: increase in fresh weight<\/p>\n<\/details>\n

\n

Question 5.
\nThe period of growth is generally divided into three phases, namely, ……………, ………….. and …………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: meristematic, elongation, maturation<\/p>\n<\/details>\n

\n

Question 6.
\nThe increased growth per unit time is termed as ……………<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: growth rate<\/p>\n<\/details>\n

\n

Question 7.
\nIn arithmetic growth, following ………….. cell division, only one ………….. continues to divide while the other differentiates and matures.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: mitoic, daughter cell<\/p>\n<\/details>\n

\n

Question 8.
\nMeasurement and comparison of total growth per unit time is called the …………….<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: absolute growth rate<\/p>\n<\/details>\n

\n

Question 9.
\nThe growth of the given system per unit initial parameter is called the ……………..<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: relative growth rate<\/p>\n<\/details>\n

\n

Question 10.
\n………….. helps in releasing metabolic energy essential for growth activities.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Oxygen<\/p>\n<\/details>\n

\n

Question 11.
\n…………….. is a term that includes all changes that an organism goes through during its life cycle from germination of the seed to senescence.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Development<\/p>\n<\/details>\n

\n

Question 12.
\n…………., ………. and …………….. are very closely related events in the life of a plant.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Growth, differentiation, development<\/p>\n<\/details>\n

\n

Question 13.
\nThe plant growth regulators are …………., …………….. of diverse chemical composition.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: small, simple molecules<\/p>\n<\/details>\n

\n

Question 14.
\n……………. is used to speed up the malting process in brewing industry.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: GA3<\/sub><\/p>\n<\/details>\n

\n

Question 15.
\n…………… is highly effective in fruit ripening.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: Ethylene<\/p>\n<\/details>\n

\n

III. Mark the statement True (T) or False (F):<\/span><\/p>\n

Question 1.
\nEthylene also promotes root growth and root hair formation, thus helping the plants to increase their absorption surface.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 2.
\nAbscisic acid (ABA) was discovered for its, role in regulating abscission and dormancy.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 3.
\nThe former group of plants are long day plants while the later ones are termed short day plants.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 4.
\nFlowering in certain plants depends not only on a combination of light and dark exposures but also their relative durations. This is termed photoperiodism.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 5.
\nBiennials are monocarpic plants that normally flower and die in the second season.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 6.
\nVernalisation refers specially to the promotion of flowering by a period of low temperatures.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 7.
\nEnvironmental signals such as light and gravity also affect certain phases\/stages of growth.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 8.
\nAn S-shaped curve is a characteristic of the living organism growing in a natural environment. It is typical for all cells, tissues and organs of a plant.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 9.
\nIn arithmetic growth, following mitoic cell division, only one daughter cell continues to divide while the other differentiates and matures.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 10.
\nWherein new cells are always being added to the plant body by the activity of the meristem is called the close form of growth.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 11.
\nDevelopment is the sum of two processes: growth and differentiation.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 12.
\nAH plant organs are made up of a variety of tissues.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 13.
\nThe plant cells grow in size by cell enlargement which in turn requires water.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

Question 14.
\nCells positioned away from shoot apical meristems differentiate as shoot-cap cells, while those pushed to the periphery mature as epidermis<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: False<\/p>\n<\/details>\n

\n

Question 15.
\nPGRs could be indole compounds (indole-3-acetic acid, IAA); adenine derivatives (N6- furfurylamino purine, kinetin), derivatives of carotenoids and fatty acids (abscisic acid, ABA); terpenes (gibberellic acid, GA3<\/sub>) or gases (ethylene, C2<\/sub>H4<\/sub>)<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: True<\/p>\n<\/details>\n

\n

IV. Match the items of column I with the items of column II<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Column I<\/td>\nColumn II<\/td>\n<\/tr>\n
(a) Terpenes<\/td>\n1. for example, root apices, developing shoot buds, young fruits etc.<\/td>\n<\/tr>\n
(b) Plant growth promoters e.g.,<\/td>\n2. a phenomenon called apical dominance.<\/td>\n<\/tr>\n
(c) This ability is called plasticity e.g.<\/td>\n3. malting process in brewing industry.<\/td>\n<\/tr>\n
(d) The ‘bakane’, (foolish seedling) a disease or rice seedling was caused by<\/td>\n4. gibberellic acid, GA3<\/sub><\/td>\n<\/tr>\n
(e) Skoog and Miller<\/td>\n5. Kinetin<\/td>\n<\/tr>\n
(f) Auxins, like IAA and indole butyric acid (IBA) have been<\/td>\n6. heterophylly in cotton, coriander and darkspur.<\/td>\n<\/tr>\n
(g) In most higher plants, the growing apical bud inhibits the growth of lateral (axillary) buds,<\/td>\n7. auxins, gibberellins and cytokinins.<\/td>\n<\/tr>\n
(h) GA3<\/sub> is used to speed up the<\/td>\n8. isolated from plant.<\/td>\n<\/tr>\n
(i) Natural cytokinins<\/td>\n9. a fungal pathogen Gibberalla fujikuroi<\/td>\n<\/tr>\n
(j) ABA stimulates the closure of stomata in the epidermis and in-creases the tolerance of plants to various kinds of stresses.<\/td>\n10. Stress hormone.<\/td>\n<\/tr>\n
(k) Short day plant<\/td>\n11. Vernalisation<\/td>\n<\/tr>\n
(l) Long day plant<\/td>\n12. Those plants which flower when the day length is more than a critical photoperiod.<\/td>\n<\/tr>\n
(m) The chilling treatment given to shoot tips or seeds is called<\/td>\n13. in biennial plants<\/td>\n<\/tr>\n
(n) Example of vernalistion is seen<\/td>\n14. Those plants which flower when the day length is less than a critical photoperiod.<\/td>\n<\/tr>\n
(o) Flowering in certain plants depends not only on a combination of light and dark exposures<\/td>\n15. but also their relative durations. This is termed photoperiodism.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\nAnswer<\/span><\/summary>\n

Answer:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Column I<\/td>\nColumn II<\/td>\n<\/tr>\n
(a) Terpenes<\/td>\n4. gibberellic acid, GA3<\/sub><\/td>\n<\/tr>\n
(b) Plant growth promoters e.g.,<\/td>\n7. auxins, gibberellins and cytokinins.<\/td>\n<\/tr>\n
(c) This ability is called plasticity e.g.<\/td>\n6. heterophylly in cotton, coriander and darkspur.<\/td>\n<\/tr>\n
(d) The ‘bakane’, (foolish seedling) a disease or rice seedling was caused by<\/td>\n9. a fungal pathogen Gibberalla fujikuroi<\/td>\n<\/tr>\n
(e) Skoog and Miller<\/td>\n5. Kinetin<\/td>\n<\/tr>\n
(f) Auxins, like IAA and indole butyric acid (IBA) have been<\/td>\n8. isolated from plant.<\/td>\n<\/tr>\n
(g) In most higher plants, the growing apical bud inhibits the growth of lateral (axillary) buds,<\/td>\n2. a phenomenon called apical dominance.<\/td>\n<\/tr>\n
(h) GA3<\/sub> is used to speed up the<\/td>\n3. malting process in brewing industry.<\/td>\n<\/tr>\n
(i) Natural cytokinins<\/td>\n1. for example, root apices, developing shoot buds, young fruits etc.<\/td>\n<\/tr>\n
(j) ABA stimulates the closure of stomata in the epidermis and in-creases the tolerance of plants to various kinds of stresses.<\/td>\n10. Stress hormone.<\/td>\n<\/tr>\n
(k) Short day plant<\/td>\n14. Those plants which flower when the day length is less than a critical photoperiod.<\/td>\n<\/tr>\n
(l) Long day plant<\/td>\n12. Those plants which flower when the day length is more than a critical photoperiod.<\/td>\n<\/tr>\n
(m) The chilling treatment given to shoot tips or seeds is called<\/td>\n11. Vernalisation<\/td>\n<\/tr>\n
(n) Example of vernalistion is seen<\/td>\n13. in biennial plants<\/td>\n<\/tr>\n
(o) Flowering in certain plants depends not only on a combination of light and dark exposures<\/td>\n15. but also their relative durations. This is termed photoperiodism.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/details>\n
\n

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Students are advised to practice the NCERT MCQ Questions for Class 11 Biology Chapter 15 Plant Growth and Development with Answers Pdf free download is available here. MCQ Questions for Class 11 Biology with Answers are prepared as per the Latest Exam Pattern. Students can solve these Plant Growth and Development Class 11 MCQs Questions …<\/p>\n

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