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Published on: 29/08/2022
QB365 provides a detailed and simple solution for every Possible Creative Questions in Class 12 Biology Subject - Botany - Plant Tissue Culture, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.
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 cryoprotectant
Dimethyl formamide
Fructose
Glycerol
Sodium alginate
2.
Assertion (A) : Liquid nitrogen is used in cryopreservation techniques.
Reason (R) : Gene bank DNA bank are the parts of germplasm conservation.
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
3.
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
4.
Assertion (A) : Protoplasts are cells devoid of cell wall.
Reason (R) : Secondary metabolites are synthesized by 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.
Assertion (A) : Sterilization helps to overcome microbes.
Reason (R) : Explants are autoclaved.
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 incorrect
6.
Assertion (A) : Incubation is followed by Inoculation.
Reason (R) : Explant is inoculated to media.
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
7.
Dimethyl sulphoxide is a _________.
Solidifying agent
Cryoprotectant
Fusogenic agent
Stimulant
8.
Identify the correct sequence regarding steps involved in PTC
Sterilization ➝ Incubation ➝ Inoculation ➝ Embryogenesis ➝ Hardening
Inoculation ➝ Induction ➝ Sterilization ➝ Hardening ➝ Embryogenesis
Induction ➝ Incubation ➝ Inoculation ➝ Hardening ➝ Sterilization
Sterilization ➝ Inoculation ➝ Incubation ➝ Embryogenesis ➝ Hardening
9.
The optimal pH of culture medium is generally ___________.
Acidic
Basic
Neutral
Slightly basic
10.
Synseeds are developed by encapsulating embryoids with __________.
Sodium chloride
Potassium iodide
Sodium alginate
Potassium dichromate
11.
A widely used fusogen in protoplast culture is ________
Polymethyl glycol
Polyethylene glycol
Polyethylene chloride
Polyvinyl chloride
12.
Protoplast are the cells devoid of ___________
Cell wall
Cell membrane
Plasma membrane
both A and B
13.
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
14.
The production of secondary metabolites require the use of _________.
Protoplast culture
Organ culture
Cell suspension culture
Virus free germ culture
15.
Identify the group of scientists who developed the intergenic hybrid - the pomato.
Yamada et al.
Horsh et al.
Takebe et al.
Melchers et al.
1.
(c)
Glycerol
2.
(a)
Both A and R are correct but R is not a correct explanation to A
3.
(d)
Both A and R are incorrect
4.
(c)
A is correct R is incorrect
5.
(c)
A is correct R is incorrect
6.
(b)
R explains A
7.
(b)
Cryoprotectant
8.
(d)
Sterilization ➝ Inoculation ➝ Incubation ➝ Embryogenesis ➝ Hardening
9.
(a)
Acidic
10.
(c)
Sodium alginate
11.
(b)
Polyethylene glycol
12.
(a)
Cell wall
13.
(d)
Temperature of 25°C ± 2°C with 16 hours of photoperiod
14.
(c)
Cell suspension culture
15.
(d)
Melchers et al.
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