जीपीएससी परीक्षा पूर्वतयारी

1.The initial frequency of a recessive eye-colour mutant in a Drosophila population is 0.4. What is the maximum change in frequency that can occur in 10 generations of complete selection against the recessive, if no other factors, such as mutation, are acting in the population?

A 0.6

B 0.08

C 0.24

D 0.32

E None of the above

Correct Answer B

Marks 1

2.The inbreeding co-efficient of an individual born of half-sib mating is

A 0.5

B 0.25

C 0.125

D 0.06125

E None of the above

Correct Answer C

Marks 1

3.The co-efficient of additive variance in monozygotic twins is

A 0.5

B 0.25

C 1

D 0.125

E None of the above

Correct Answer C

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4.The sperm concentration in sexed semen straw is approximately

A 2 million

B 20 million

C 30 million

D 15 million

E None of the above

Correct Answer A

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5. Prediction of breeding values of animals using dense marker maps is

A genetic selection

B genomic selection

C gametic selection

D Marker Assisted Selection

E None of the above

Correct Answer B

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6. In CRISPR-Cas9 gene editing, the guide RNA functions primarily by:

A Repairing DNA strand breaks directly

B Providing energy for DNA cleavage

C Directing Cas9 enzyme to a complementary DNA sequence

D Ligating DNA fragments after cleavage

E None of the above

Correct Answer C

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7. Which statement best describes epigenetic inheritance?

A Alteration in DNA sequence transmitted across generations

B Transmission of phenotypic traits exclusively through mitochondria

C Heritable changes in gene expression without alteration of nucleotide sequence

D Random mutation induced by environmental toxins

E None of the above

Correct Answer C

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8. Which molecular mechanism is primarily responsible for maintaining genomic integrity by correcting mismatched nucleotides immediately after DNA replication?

A Base excision repair

B Nucleotide excision repair

C Mismatch repair

D Non-homologous end joining

E None of the above

Correct Answer C

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9. What is the heritability estimate when regression of offspring on mean of parents = 0.32, assuming that resemblance due to environment / dominance is negligible?

A 0.32

B 0.64

C 0.16

D 0.08

E None of the above

Correct Answer A

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10. In the snail Limnaea, dextral (right) coiling is dominant to sinistral (left) coiling and shows a maternal effect. What are the possible genotypes for direction of coiling in a phenotypically dextral snail?

A DD and Dd

B Only DD

C Dd only

D DD, Dd or dd

E None of the above

Correct Answer D

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11. READ THE PASSAGE BELOW AND ANSWER THE QUESTIONS:

The rapid expansion of Electric Vehicles (EVs) has significantly altered the global transportation landscape. Governments worldwide have promoted EV adoption through subsidies, tax exemptions, and investments in charging infrastructure to reduce dependence on fossil fuels and lower urban pollution levels. Supporters argue that EVs represent a sustainable alternative to conventional automobiles because they produce fewer direct emissions. However, environmental analysts caution that the overall ecological benefit of EVs depends largely on the energy sources used for electricity generation. In nations where coal-fired power plants dominate energy production, EVs may indirectly contribute to substantial carbon emissions. Furthermore, the extraction of rare earth minerals and disposal of lithium-ion batteries raise serious environmental and ethical concerns. Despite these criticisms, technological advancements in battery efficiency and renewable energy integration continue to strengthen the long-term prospects of EVs. Economists also note that the EV industry has created new opportunities for innovation, employment, and industrial investment. Consequently, the debate surrounding EVs is no longer limited to transportation alone but extends to broader questions of sustainability, energy policy, and economic transition.

Why does the author mention "rare earth minerals" and "lithium-ion batteries"?

A To highlight the economic profitability of EVs

B To identify technological limitations unrelated to the environment

C To present environmental and ethical concerns associated with EV production

D To argue against renewable energy investments

E None of the above

Correct Answer C

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12. READ THE PASSAGE BELOW AND ANSWER THE QUESTIONS:

The rapid expansion of Electric Vehicles (EVs) has significantly altered the global transportation landscape. Governments worldwide have promoted EV adoption through subsidies, tax exemptions, and investments in charging infrastructure to reduce dependence on fossil fuels and lower urban pollution levels. Supporters argue that EVs represent a sustainable alternative to conventional automobiles because they produce fewer direct emissions. However, environmental analysts caution that the overall ecological benefit of EVs depends largely on the energy sources used for electricity generation. In nations where coal-fired power plants dominate energy production, EVs may indirectly contribute to substantial carbon emissions. Furthermore, the extraction of rare earth minerals and disposal of lithium-ion batteries raise serious environmental and ethical concerns. Despite these criticisms, technological advancements in battery efficiency and renewable energy integration continue to strengthen the long-term prospects of EVs. Economists also note that the EV industry has created new opportunities for innovation, employment, and industrial investment. Consequently, the debate surrounding EVs is no longer limited to transportation alone but extends to broader questions of sustainability, energy policy, and economic transition.

Which of the following can be logically inferred from the passage?

A EVs completely eliminate carbon emissions in all countries.

B Renewable energy integration may improve the sustainability of EVs.

C Conventional automobiles are economically more beneficial than EVs.

D Governments are unwilling to support EV industries financially.

Correct Answer B

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13. READ THE FOLLOWING PASSAGE AND ANSWER THE QUESTIONS:

Financial behavior among youngsters has undergone considerable transformation in the digital era. Easy access to online banking, digital wallets, instant credit systems, and e-commerce platforms has made financial transactions more convenient than ever before. However, financial experts argue that such convenience has also encouraged impulsive spending and weakened the traditional culture of savings among young people. Many adolescents and young professionals increasingly associate financial success with visible consumption rather than disciplined wealth management. Social media platforms further intensify this trend by promoting luxury lifestyles and instant gratification. Economists warn that inadequate financial literacy at an early age can lead to long-term debt dependency and poor investment decisions. Consequently, educational institutions and financial organizations have begun introducing programs on budgeting, saving, taxation, and responsible borrowing. Advocates of financial education believe that cultivating saving habits during youth not only improves individual economic security but also contributes to broader economic stability within society.

What is the primary concern expressed in the passage?

A Decline in online banking systems

B Increasing influence of technology on agriculture

C Weakening savings habits among youngsters

D Excessive government regulation of financial institutions

E None of the above

Correct Answer C

Marks 1