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Botany
- Online Test
TN State Board
TN 12th Standard
Botany
TEST : 27
TN State Board
TN 12th Standard
Botany
UNIT VI: Reproduction in Plants
Prepare / Learn
Q1.
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
A.
camylotropous
B.
anatropous
C.
orthotropous
D.
hemianatropous
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 2: Classical Genetics
Prepare / Learn
Q2.
The dominant epistatis ratio is
A.
9:3:3:1
B.
12:3:1
C.
9:3:4
D.
9:6:1
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Answer :
Option B
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT VII: Genetics
Prepare / Learn
Q3.
Mutations can be induced with
A.
Gamma radiations
B.
Infrared radiations
C.
IAA
D.
Ethylene
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 3: Chromosomal Basis of Inheritance
Prepare / Learn
Q4.
A eukaryotic gene contains two kinds of base sequences which of these plays an important role in protein synthesis?
A.
Introns
B.
Exons
C.
Both a and b
D.
None of the above
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Answer :
Option B
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT VIII: Biotechnology
Prepare / Learn
Q5.
The colonies of recombinant bacteria appear white in contrast to blue colonies of non- recombinant bacteria because of
A.
Non-recombinant bacteria containing beta galactosidase
B.
Insertional inactivation of a-galactosidase in non-recombinant bacteria
C.
Insertional inactivation of b-galactosidase in recombinant bacteria
D.
Inactivation of glycosidase enzyme in recombinant bacteria
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Answer :
Option C
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 6: Principles of Ecology
Prepare / Learn
Q6.
Strong, sharp spines that get attached to animal’s feet are found in the fruits of
A.
Argemone
B.
Ecballium
C.
Heritier
D.
Crossandra
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT IX: Plant Ecology
Prepare / Learn
Q7.
Which one of the following is not a functional unit of an ecosystem?
A.
Energy flow
B.
decomposition
C.
Productivity
D.
stratification
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 10: Economically Useful Plants and Entrepreneurial Botany
Prepare / Learn
Q8.
Assertion: In Spirulina culture, half of the required nutrie nts added first and the rest in later.
Reason: If all the nutrients are added first, it will affect the culture growth.
A.
Both A and R are true and R is the correct explanation of A.
B.
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.
View Solution
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Answer :
Option B
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
Chapter 1: Asexual and Sexual Reproduction in Plants
Prepare / Learn
Q9.
Caruncle develops from
A.
funicle
B.
nucellus
C.
integument
D.
embryo sac
View Solution
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Answer :
Option C
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Botany
UNIT VI: Reproduction in Plants
Prepare / Learn
Q10.
Endosperm is formed during the double fertilization by
A.
two polar nuclei and one male gamete
B.
one polar nuclei and one male gamete
C.
ovum and male gametes
D.
two polar nuclei and two male gametes
View Solution
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Answer :
Option A
Explaination / Solution:
No Explaination.
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TN State Board
TN 12th Standard
Botany
TEST : 27
Botany
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UNIT VI: Reproduction in Plants
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UNIT VII: Genetics
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UNIT VIII: Biotechnology
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UNIT IX: Plant Ecology
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UNIT X: Economic Botany
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Chapter 1: Asexual and Sexual Reproduction in Plants
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Chapter 2: Classical Genetics
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Chapter 3: Chromosomal Basis of Inheritance
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Chapter 4: Principles and Processes of Biotechnology
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Chapter 5: Plant Tissue Culture
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Chapter 6: Principles of Ecology
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Chapter 7: Ecosystem
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Chapter 8: Environmental Issues
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Chapter 9: Plant Breeding
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Chapter 10: Economically Useful Plants and Entrepreneurial Botany
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