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Published on: 05/11/2020
12th Standard Botany - Plant Tissue Culture English Medium Free Online Test One Mark Questions 2020 - 2021
Download Tamil Nadu 12th Standard Biology 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 Biology Test1.
Identify the mismatched pair:
Digoxin - Digitalis purpurea
Codeine - Capsicum annum
Vincristine - Catharanthus roseus
Quinine - Cinchona officinalis
2.
The enzymatic mixture for chemical isolation of protoplast is
0.5% macrozyme, 2% onozuka cellulase, 13% mannitol
1.5% macrozyme, 0.5% onozuka cellulase, 12% sorbitol
2% macrozyme, 0.5% onozuka cellulase, 13% sorbitol
0.1% macrozyme, 2% onozuka cellulase, 15% mannitol
3.
Identify the cryoprotectant
Dimethyl formamide
Fructose
Glycerol
Sodium alginate
4.
Assertion (A) : Development of root from callus is called caulogenesis.
Reason (R) : Caulogenesis is the final step of protoplasmic fusion.
Both A and R are correct but R is not a correct explanation to A
R explains A
A is correct R is incorrect
Both A and R are incorrect
5.
The optimal pH of culture medium is generally ___________.
Acidic
Basic
Neutral
Slightly basic
6.
A widely used fusogen in protoplast culture is ________
Polymethyl glycol
Polyethylene glycol
Polyethylene chloride
Polyvinyl chloride
7.
Which of the following condition favours callus induction?
Temperature of 25°C ± 5°C with 12 hours of photoperiod
Temperature of 25°C ± 2°C with 18 hours of photoperiod
Temperature of 25°C ± 5°C with 14 hours of photoperiod
Temperature of 25°C ± 2°C with 16 hours of photoperiod
8.
Cryopreservation means it is a process to preserve plant cells, tissues or organs _____.
at very low temperature by using ether.
at very high temperature by using liquid nitrogen
at very low temperature of -196°C by using liquid nitrogen
at very low temperature by using liquid nitrogen
9.
Which of the following statement is correct
Agar is not extracted from marine algae such as seaweeds
Callus undergoes differentiation and produces somatic embryoids.
Surface sterilization of explants is done by using mercuric bromide
PH of the culture medium is 5.0 to 6.0
10.
Totipotency refers to _____.
capacity to generate genetically identical plants.
capacity to generate a whole plant from any plant cell / explant.
capacity to generate hybrid protoplasts.
recovery of healthy plants from diseased plants.
1.
(b)
Codeine - Capsicum annum
2.
(a)
0.5% macrozyme, 2% onozuka cellulase, 13% mannitol
3.
(c)
Glycerol
4.
(d)
Both A and R are incorrect
5.
(a)
Acidic
6.
(b)
Polyethylene glycol
7.
(d)
Temperature of 25°C ± 2°C with 16 hours of photoperiod
8.
(c)
at very low temperature of -196°C by using liquid nitrogen
9.
(b)
Callus undergoes differentiation and produces somatic embryoids.
10.
(c)
capacity to generate hybrid protoplasts.
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