UPSC Mains BOTANY-PAPER-II 2021

28 Questions • 400 Marks • With Detailed Model Answers

1
10 Marksmedium
Cell adhesion molecules
BiologyBiochemistry
2
10 Marksmedium
Ribosomal RNA processing in nucleolus
BiologyBiochemistry
3
10 Marksmedium
Genetic consequences of Inversion
BiologyGenetics
4
10 Marksmedium
Gene silencing
BiologyGenetics
5
10 Marksmedium
Use of apomixis in plant breeding
AgricultureBotany
6
20 Marksmedium
Describe types and composition of chromatin. How is DNA packaged in a eukaryotic cell ?
BiologyBiochemistry
7
15 Marksmedium
Explain coupling and repulsion hypothesis in linkage. Give a brief account of procedure used in preparing a chromosome map with the help of three-point test cross.
BiologyGenetics
8
15 Markseasy
What do you understand by standard deviation and coefficient of variation? Discuss their significance.
BiologyStatistics
9
20 Marksmedium
Describe properties of genetic code and briefly explain Wobble hypothesis.
BiologyGenetics
10
15 Marksmedium
What are the characteristic features of Cytoplasmic inheritance ? Describe the role of chloroplast and mitochondrial genes in this inheritance.
BiologyGenetics
11
15 Marksmedium
Discuss the biosafety concerns of transgenic plants.
AgricultureBiotechnology
12
20 Marksmedium
Describe various methods of gene transfer in plants.
AgricultureBiotechnology
13
15 Marksmedium
Give an account of Operon model for regulation of gene activity.
BiologyGenetics
14
15 Marksmedium
Explain the process of cell signalling highlighting the role of various signalling molecules.
BiologyBiochemistry
15
10 Marksmedium
Alkaloids and their significance
BotanyChemistry
16
10 Marksmedium
Role of growth substances in agri-horticulture
AgricultureBotany
17
10 Marksmedium
Plant indicators
BotanyEnvironmental Science
18
10 Marksmedium
Invasive species and their characteristics
EcologyEnvironmental Science
19
10 Markseasy
IUCN Red List Categories
EcologyEnvironmental Science
20
20 Marksmedium
Describe C4 cycle of photosynthesis and differentiate amongst C3, C4 and CAM plants.
BotanyBiology
21
15 Marksmedium
Define Vernalization. Discuss its mechanism and importance.
BotanyAgriculture
22
15 Marksmedium
What is biological nitrogen fixation ? Describe root nodule formation and role of nitrogenase complex in fixing of nitrogen.
BotanyMicrobiology
23
20 Marksmedium
What is unique of Indian plant biodiversity ? Discuss briefly the threats and various conservation strategies.
EcologyGeography
24
15 Marksmedium
What is social forestry ? Explain its types and benefits.
EnvironmentAgriculture
25
15 Marksmedium
Give a brief account of ecological pyramids. Describe ecological factors and their significance in plants.
EcologyBotany
26
20 Marksmedium
What are the different types and causes of seed dormancy? Describe various methods used to overcome it. Is it an ecological adaptation ? Explain.
BotanyEcology
27
15 Markseasy
Describe the concept of sustainable development highlighting its objectives and importance.
EnvironmentEconomy
28
15 Marksmedium
Describe in detail the endemism highlighting its categories, causes of endemism and conservation priorities.
EcologyBiodiversity