UPSC 2003 Science and Technology Questions with Answers
21 previous year UPSC Prelims questions on Science and Technology in the UPSC 2003 Prelims. Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
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UPSC 2003Science and Technology · Biology: Zoology
Q21. With reference to normal human beings, consider the following statements: 1. In response to the presence of HCl, secretin is produced from the duodenum. 2. Enterogastrone is produced in the small intestine in response to the presence of fatty acids. Which of these statements is/are correct?
Explanation
Statement 1 is correct: When hydrochloric acid (HCl) from the stomach enters the duodenum, it lowers the pH of intestinal contents. This triggers S-cells in the duodenal lining to release secretin. Secretin signals the pancreas to release bicarbonate-rich fluid. This fluid neutralizes the acid, creating an optimal environment for digestive enzymes to function.
Statement 2 is correct: Enterogastrone refers to a group of hormones secreted by the duodenal mucosa when dietary fats are present. These hormones, including secretin and cholecystokinin (CCK) slows down gastric motility and inhibit stomach secretions. This regulation ensures that chyme moves gradually from the stomach to the small intestine, promoting better fat digestion and absorption.
Answer key for these questions
Q
UPSC year
Correct answer
21
2003
(c) Both 1 and 2
Frequently asked questions
How many previous year UPSC questions are there on Science and Technology?
This page covers 21 previous year UPSC Prelims GS Paper-I questions on Science and Technology in the UPSC 2003 Prelims, asked from 1996 to 2025. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Science and Technology?
Questions on Science and Technology in the UPSC 2003 Prelims are available for 30 years, from 1996 to 2025. Use the Year filter to practise a single paper.
