Q2581. What triggers the activation of the Bt toxin in the gut of the target insect?
RAS Prelims MCQ Practice
9,654 RAS Prelims practice MCQs with the correct answer and a clear explanation for each. Filter by subject and chapter.
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Q2582. Given below are two statements, one labelled as
Assertion (A) and the other as Reason (R):
Assertion (A): Prithviraj III could not consolidate his victory after the First Battle of Tarain.
Reason (R): He allowed Muhammad Ghori’s forces to retreat rather than pursuing and destroying them.
Which of the following is correct?
Assertion (A) and the other as Reason (R):
Assertion (A): Prithviraj III could not consolidate his victory after the First Battle of Tarain.
Reason (R): He allowed Muhammad Ghori’s forces to retreat rather than pursuing and destroying them.
Which of the following is correct?
Explanation
After defeating Muhammad Ghori in the First Battle of Tarain in 1191, Prithviraj III failed to capitalize on his success. Rather than pursuing the retreating Ghorid army and permanently eliminating the threat, he allowed them to return to Ghazni. This strategic error gave Ghori the time to regroup and return with a more organized force the following year, leading to Prithviraj’s final defeat.
Q2583. Which of the following crops was the first transgenic crop introduced for commercial cultivation in the world?
Explanation
The Flavr Savr tomato, developed by Calgene and released in 1994, was the first genetically modified food crop to be granted a license for commercial sale and human consumption. It was engineered to have a longer shelf life and resist rotting by silencing the gene responsible for fruit softening. Although it was later withdrawn from the market, it paved the way for future GMOs.
Q2584. The Guhila ruler who successfully resisted the invasion of the Gujarat Sultan Qutbuddin Ahmad Shah and was known as a great builder was:
Explanation
Rana Kumbha of Mewar was a brilliant military strategist and a prolific builder who successfully defended his kingdom against multiple invasions. He famously repelled the forces of Qutbuddin Ahmad Shah of Gujarat and Mahmud Khalji of Malwa. His reign is also celebrated for the construction of thirty-two forts, including the formidable Kumbhalgarh, and for his immense contributions to the arts and literature of Mewar.
Q2585. The Human Genome Project (HGP) was officially launched in which year?
Explanation
The Human Genome Project was an international scientific research project officially launched in October 1990. Its monumental goal was to determine the base pairs that make up human DNA and to identify and map all the genes of the human genome from both a physical and functional standpoint. This multi-billion dollar mega-project involved scientists from around the world and was publicly funded.
Q2586. Consider the following texts:
I. Kamraj Ratisar
II. Sudha Prabandh
III. Raj Ratnakar
Which of the above text(s) is/are correctly attributed to Rana Kumbha?
I. Kamraj Ratisar
II. Sudha Prabandh
III. Raj Ratnakar
Which of the above text(s) is/are correctly attributed to Rana Kumbha?
Explanation
Rana Kumbha was a prolific author whose literary works are central to the cultural history of Mewar. He authored Kamraj Ratisar, a work on erotics, and Sudha Prabandh, which is a commentary on the Gitagovinda. However, Raj Ratnakar is not his work; it was written by the scholar Sada Shiva during the reign of a much later ruler, Maharana Raj Singh, in the seventeenth century.
Q2587. Consider the following statements about the Human Genome Project:
I. It aimed to sequence the entire 3 billion base pairs of human DNA.
II. It discovered that humans have around 20,000 - 25,000 genes.
III. Less than 2% of the genome codes for proteins.
IV. It was an international, publicly funded mega-project.
V. It helped establish the field of bioinformatics.
Which of the above statement(s) is/are correct?
I. It aimed to sequence the entire 3 billion base pairs of human DNA.
II. It discovered that humans have around 20,000 - 25,000 genes.
III. Less than 2% of the genome codes for proteins.
IV. It was an international, publicly funded mega-project.
V. It helped establish the field of bioinformatics.
Which of the above statement(s) is/are correct?
Explanation
The Human Genome Project was a public mega-project that successfully sequenced the 3 billion base pairs of the human genome. Major findings included that humans have approximately 20,000 to 25,000 genes, and that less than 2% of the entire genome actually codes for proteins. The project also directly led to the birth of bioinformatics, the field dedicated to managing genomic research data.
Q2588. During the reign of Rana Sanga, which river formed the eastern boundary of the Mewar empire?
Explanation
During the peak of Rana Sanga’s power in the early sixteenth century, the Mewar Empire reached its greatest territorial extent. His influence was so vast that historical records indicate the Sindh River in Central India served as the eastern boundary of his domain. This expansion made him the most powerful Hindu sovereign in North India, capable of challenging both the Lodi Sultanate and the rising Mughals.
Q2589. Consider the following steps involved in sequencing a genome (Whole Genome Shotgun approach):
I. Isolation of DNA
II. Fragmentation
III. Cloning into vectors
IV. Sequencing
V. Computer-based assembly
Which of the following represents the correct sequence?
I. Isolation of DNA
II. Fragmentation
III. Cloning into vectors
IV. Sequencing
V. Computer-based assembly
Which of the following represents the correct sequence?
Explanation
The Whole Genome Shotgun approach involves several logical steps. First, the total DNA is isolated from the cell. Then, it is broken into smaller fragments. These fragments are cloned into vectors to create a genomic library. Each fragment is then sequenced using automated sequencers. Finally, powerful computer algorithms are used to align overlapping sequences and assemble them into the complete genome sequence.
Q2590. Consider the following statements regarding Rao Chandrasen of Marwar:
I. He participated in the Nagaur Darbar of 1570 CE but refused to submit to Akbar.
II. He is considered the precursor to Maharana Pratap in anti-Mughal resistance.
III. He successfully recaptured Jodhpur and ruled it until his death.
IV. He faced the military opposition of his own brothers, Ram Singh and Udai Singh.
Which of the above statement(s) is/are correct?
I. He participated in the Nagaur Darbar of 1570 CE but refused to submit to Akbar.
II. He is considered the precursor to Maharana Pratap in anti-Mughal resistance.
III. He successfully recaptured Jodhpur and ruled it until his death.
IV. He faced the military opposition of his own brothers, Ram Singh and Udai Singh.
Which of the above statement(s) is/are correct?
Explanation
Rao Chandrasen of Marwar is renowned for his resistance against Mughal authority. Although he attended the Nagaur Darbar in 1570, he refused to submit to Akbar, earning him the title of the ‘Forgotten Hero’. He faced internal opposition from his brothers and fought from the hills, setting a precedent for future Rajput resistance against centralized imperial power, even though he never permanently recaptured Jodhpur.Answer key for these questions
| Q | Correct answer |
|---|---|
| 2581 | (c) Alkaline pH |
| 2582 | (a) Both A and R are true and R is the correct explanation of A. |
| 2583 | (a) Flavr Savr Tomato |
| 2584 | (a) Rana Kumbha |
| 2585 | (b) 1990 |
| 2586 | (a) I and II only |
| 2587 | (d) I, II, III, IV and V |
| 2588 | (d) Sindh |
| 2589 | (a) Isolation of DNA - Fragmentation - Cloning into vectors - Sequencing - Computer-based assembly |
| 2590 | (b) I, II and IV |
Frequently asked questions
How many RAS Prelims practice MCQs are there on RAS Prelims?
This page has 9654 practice MCQs on the RAS Prelims syllabus. Each has the correct answer, and most have an explanation.
How should I practise MCQs for RAS Prelims?
Attempt each question first, then open the answer and read the explanation. Practise one chapter at a time, note the facts you got wrong and revise them. Repeat the chapter after a few days.
Are these actual RAS Prelims past-paper questions?
No. These are practice questions written for the RAS Prelims syllabus. They follow the pattern the exam uses: factual questions, statement-based questions, match-the-list and assertion-reason.