Tamil Nadu Board 12th Standard Botany - Chapter 5: Book Back Answers and Solutions
This post covers the book back answers and solutions for Chapter 5 – Botany from the Tamil Nadu State Board 12th Standard Botany textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.
We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.
By going through this material, you’ll gain a strong understanding of Botany Chapter 5 along with the corresponding book back questions and answers (PDF format).
Question Types Covered:
- 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following
- 2 Mark Questions: Answer briefly
- 3, 4, and 5 Mark Questions: Answer in detail
All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.
All the best, Class 12 students! Prepare well and aim for top scores. Thank you!
Unit 5 - Plant Tissue Culture
I. Multiple Choice Questions
a) capacity to generate genetically identical plants.
b) capacity to generate a whole plant from any plant cell / explant.
c) capacity to generate hybrid protoplasts.
d) recovery of healthy plants from diseased plants.
Answer Key:
b) capacity to generate a whole plant from any plant cell / explant.
2. Micro propagation involves
a) vegetative multiplication of plants by using micro-organisms.
b) vegetative multiplication of plants by using small explants.
c) vegetative multiplication of plants by using microspores.
d) Non-vegetative multiplication of plants by using microspores and megaspores.
Answer Key:
b) vegetative multiplication of plants by using small explants.
3. Match the following :
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Column A
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Column B
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1) Totipotency
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A) Reversion of mature cells into meristerm
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2) Dedifferentiation
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B) Biochemical and structural changes of cells
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3) Explant
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C) Properties of living cells develops into entire
plant
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4) Differentiation
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D) Selected plant tissue transferred to culture medium
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a) C A D B
b) A C B D
c) B A D C
d) D B C A
Answer Key:
a) C A D B
4. The time duration for sterilization process by using autoclave is ______ minutes and the temperature is _______
a) 10 to 30 minutes and 125° C
b) 15 to 30 minutes and 121° C
c) 15 to 20 minutes and 125° C
d) 10 to 20 minutes and 121° C
Answer Key:
b) 15 to 30 minutes and 121° C
5. Which of the following statement is correct
a) Agar is not extracted from marine algae such as seaweeds.
b) Callus undergoes differentiation and produces somatic embryoids.
c) Surface sterilization of explants is done by using mercuric bromide
d) PH of the culture medium is 5.0 to 6.0
Answer Key:
b) Callus undergoes differentiation and produces somatic embryoids.
6. Select the incorrect statement from given statement
a) A tonic used for cardiac arrest is obtained from Digitalis purpuria
b) Medicine used to treat Rheumatic pain is extracted from Capsicum annum
c) An anti malarial drug is isolated from Cinchona officinalis.
d) Anti-cancinogenic property is not seen in Catharanthus roseus.
Answer Key:
d) Anti-cancinogenic property is not seen in Catharanthus roseus.
7. Virus free plants are developed from
a) Organ culture
b) Meristem culture
c) Protoplast culture
d) Cell suspension culture
Answer Key:
b) Meristem culture
8. The prevention of large scale loss of biological interity
a) Biopatent
b) Bioethics
c) Biosafety
d) Biofuel
Answer Key:
c) Biosafety
9. Cryopreservation means it is a process to preserve plant cells, tissues or organs
a) at very low temperature by using ether.
b) at very high temperature by using liquid nitrogen
c) at very low temperature of -196 by using liquid nitrogen
d) at very low temperature by using liquid nitrogen
Answer Key:
c) at very low temperature of -196 by using liquid nitrogen
10. Solidifying agent used in plant tissue culture is
a) Nicotinic acid
b) Cobaltous chloride
c) EDTA
d) Agar
Answer Key:
d) Agar
II. Short Answer Questions
12th bio botanyIII. Long Answer Questions
12th bio botanyIV. Exercise
12thbio botany
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