MCQ Bank

Lyophilisation (freeze-drying) removes water from samples under vacuum conditions, effectively stabilizing and preserving DNA for long-term storage without degradation.

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Q121

___________ is defined as the number of species represented in a specific region, landscape or an ecological community

A) Commensalism
B) Species richness
C) Population density
D) Coevolution

AI Explanation

Species richness is defined as the total count or number of different species present in a specific region, ecological community, or landscape.

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Q122

Plants are totipotent because______________

A) they have lesser potential for tissue culturing
B) Each cell has full genetic potential of the organism
C) they have growth promoting factors
D) A single cell could become a complete plant

AI Explanation

Cellular totipotency in plants means that individual somatic cells retain the complete genetic blueprint and capacity to regenerate into an entire plant under proper culture conditions.

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Q123

__________ are needed to be able to cope with changing climatic conditions and increasing demands for food and retain the capacity to adapt to potential changes in the types of crops grown

A) Insects
B) Birds
C) Invertebrates
D) Pollinator populations

AI Explanation

Diverse and healthy pollinator populations are crucial for agricultural productivity, helping crops adapt to changing climatic conditions and satisfying growing food demands.

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Q124

What is the characteristic of the DNA that is used for the construction of library?

A) Naked DNA
B) Plasmid and naked DNA
C) Plasmid
D) Plasmid is preferred over naked DNA

AI Explanation

Plasmids are preferred over naked DNA for constructing genomic or cDNA libraries because they act as stable vectors that can be efficiently introduced into host cells for replication and screening.

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Q125

During tissue culture growth room temperature range from __________depending on species requirements.

A) 35 ºC to 40 ºC
B) 60 ºC to 70 ºC
C) 22 ºC to 28 ºC
D) 10 ºC to 20 ºC

AI Explanation

Plant tissue culture growth rooms are typically maintained at a controlled temperature range between 22 and 28 degrees Celsius to optimize cellular metabolism and shoot development.

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Q126

16. Which of the following statement is correct about the Sanctuary?

A) reserves area meant for preserving its natural vegetation, wildlife and natural beauty
B) A reserved area meant for preservation and development of endangered species
C) All of the given
D) Multipurpose protected areas to preserve genetic diversity in representative ecosystem

AI Explanation

Wildlife sanctuaries are established primarily as protected zones dedicated to safeguarding, preserving, and aiding the recovery and development of threatened or endangered species.

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Q127

The capacity of ecosystem to adapt is diminished when biodiversity of ________ is lost

A) Reptiles
B) Mammals
C) Fishes
D) Invertebrates

AI Explanation

Loss of invertebrate biodiversity significantly disrupts ecological functions and web interactions, which diminishes the overall capacity of ecosystems to adapt to environmental changes.

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Q128

2. The removal of the medium and transfer of cells from a previous culture into fresh growth medium, for further propagation of the cell line or cell strain is called____________

A) Propagation
B) Regenratio
C) Subculturing
D) Germination

AI Explanation

Subculturing involves periodically transferring cells or tissues from an existing culture into fresh growth medium to provide necessary nutrients and allow continued propagation.

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Q129

____________have created barriers to the migration of invertebrate species

A) Climates
B) Food
C) Human activities
D) Temperature

AI Explanation

Urbanization, infrastructure development, and agricultural expansion resulting from human activities create physical barriers that fragment habitats and hinder the natural migration of invertebrate species.

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Q130

__________ factor/factors can affect the services of invertebrates to the environment.

A) All given
B) changing rainfall patterns
C) changing temperatures
D) elevated carbon dioxide

AI Explanation

Environmental services provided by invertebrates are significantly impacted by multiple global change factors, including rising temperatures, altered rainfall patterns, and elevated carbon dioxide levels.

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Q131

The adaptive capacity of ecosystem is more likely to dependent on ____________

A) Specie migration
B) Genetic resources
C) Invertebrate biodiversity
D) Pollination

AI Explanation

An ecosystem's capacity to adapt to environmental stressors and changes heavily relies on the underlying genetic resources and variability present within its populations.

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Q132

DNA banks are used for the storage of those species that cannot be conserved in ____________ process of conservation.

A) Insuito
B) Excuito
C) Invitro
D) Invivo

AI Explanation

DNA banks provide an alternative storage option for species whose genetic material cannot be effectively conserved or maintained through traditional in vivo methods.

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Q133

_____________ organisms are described as the engineer of ecosystem

A) Reptiles
B) Leaches
C) Earhworms
D) Fishes

AI Explanation

Earthworms are widely recognized as ecosystem engineers because their burrowing and feeding activities fundamentally alter soil structure, aeration, and nutrient cycling.

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Q134

The lack of _____________may inhibit the ability of the population to respond to climate change

A) Genetic diversity
B) Migration
C) Adaptation
D) Gene Mutation

AI Explanation

A lack of genetic diversity reduces the phenotypic variation required for natural selection to act upon, thereby inhibiting a population's ability to adapt to climate change.

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Q135

Studies have shown that the presence of invertebrates, such as earthworms can help to ____________ the effects of drought on crop Production.

A) Alleviate
B) Enhance
C) Increase
D) aggravate

AI Explanation

Earthworms improve soil structure, water infiltration, and root penetration, which helps mitigate and alleviate the negative impacts of drought stress on crop productivity.

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Q136

In plant tissue culture, what is the term ORGANOGENESIS means?

A) Formation of root & shoot from callus culture
B) Formation of callus culture
C) Genesis of organ
D) None of the given

AI Explanation

Organogenesis in plant tissue culture specifically refers to the developmental process where organs like roots and shoots are formed from unorganized callus tissue.

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Q137

Field gene banks also called plant gene banks are areas of land in which__________ collections of growing plants are assembled

A) Callus
B) Germplasm
C) All given
D) Seed

AI Explanation

Field gene banks utilize plots of land specifically dedicated to maintaining living collections of plant germplasm that cannot be easily stored as seeds.

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Q138

Ex-suito conservation is also known as ________________

A) Biosphere Reserves
B) Static conservation
C) Gene Sanctuaries
D) Dynamic conservation

AI Explanation

Ex-situ conservation methods, particularly living collections like field gene banks and botanic gardens, are sometimes referred to as dynamic conservation because plants continue to grow and reproduce.

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Q139

It has been estimated that at least _______percent of world food production comes from crops that are dependent on insect pollination.

A) 25
B) 35
C) 20
D) 30

AI Explanation

Agricultural studies estimate that approximately 35 percent of global food production relies on crops dependent on insect pollination for yield and quality.