Q41. The Recommended Dietary Allowance (RDA) for iron is highest for which of the following demographic groups?
Health, Environment and Agriculture: RAS Prelims MCQs
662 RAS Prelims practice MCQs on health, environment and agriculture are on this page, in 4 chapters. They cover human health, food, nutrition and public health programmes, environmental and ecological changes and impact assessment, biodiversity and conservation of natural resources, and agriculture, horticulture, forestry and animal husbandry in Rajasthan. Each question has an answer and an explanation.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
Showing 41–50 of 662 questions
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Q42. Body Mass Index (BMI) is a common metric used to classify malnutrition (underweight and overweight). It is calculated as:
Explanation
Body Mass Index is a simple and widely used anthropometric tool to categorize individuals as underweight, normal weight, overweight, or obese. It is calculated by dividing an individual’s weight in kilograms by the square of their height in meters. This metric provides a general assessment of body fatness and helps identify potential health risks associated with different weight categories.
Q43. Arrange the following steps of detecting food adulteration in a suspected sample in the correct logical sequence:
I. Compare results with standard parameters
II. Collect a representative sample
III. Perform chemical analysis in a certified lab
IV. Document the batch and expiry details of the product
Which of the following represents the correct sequence?
I. Compare results with standard parameters
II. Collect a representative sample
III. Perform chemical analysis in a certified lab
IV. Document the batch and expiry details of the product
Which of the following represents the correct sequence?
Explanation
To detect food adulteration, the first step is to collect a representative sample of the suspected item. Next, the batch and expiry details of the product must be documented for legal and tracking purposes. The sample is then sent for chemical analysis in a certified laboratory. Finally, the laboratory results are compared with established standard parameters to determine if adulteration occurred.
Q44. Metanil yellow is a prohibited food dye commonly used illegally to adulterate which of the following food items to enhance its colour?
Explanation
Metanil yellow is a non-permitted food color that is sometimes illegally added to turmeric powder to enhance its bright yellow appearance. This chemical is a synthetic dye that can be toxic if consumed, potentially causing damage to the nervous system and liver. Consumers are advised to check the purity of turmeric, as food safety regulations strictly prohibit the use of such dyes.
Q45. High concentrations of salt or sugar preserve food primarily by:
Explanation
High concentrations of salt or sugar act as preservatives by creating a hypertonic environment. This process, known as osmosis, draws water out of the cells of microorganisms like bacteria and fungi, causing them to shrink and become inactive or die. Without sufficient internal water, these microbes cannot grow or reproduce, thereby preventing the spoilage of the preserved food items.
Q46. Bile juice, which aids in the emulsification of fats, is produced by the __________ and stored in the __________.
Explanation
Bile is a digestive fluid produced by the liver that plays a critical role in the emulsification of dietary fats. Once produced, it is transported to and stored in the gallbladder, where it becomes more concentrated. During digestion, the gallbladder releases bile into the small intestine to help break down large fat globules into smaller droplets, facilitating efficient enzyme action.
Q47. In the adaptive immune system, antibodies are primarily produced by:
Explanation
B-lymphocytes, or B cells, are a type of white blood cell that forms a key part of the adaptive immune system. When they encounter a specific antigen, they differentiate into plasma cells that produce and secrete large quantities of antibodies. These antibodies circulate in the blood and other body fluids, specifically binding to and neutralizing pathogens like bacteria and viruses.
Q48. Which of the following best describes the concept of "Herd Immunity"?
Explanation
Herd immunity, also known as community immunity, occurs when a large proportion of a population becomes immune to a specific infectious disease, either through vaccination or previous infection. This high level of immunity makes it difficult for the pathogen to spread, thereby providing indirect protection to those who are not immune, such as infants or individuals with weakened immune systems.
Q49. Which of the following sets consists entirely of viral diseases?
Explanation
Rabies, measles, and poliomyelitis are all caused by different types of viruses. Rabies is a fatal viral infection of the nervous system, measles is a highly contagious respiratory virus, and polio is a viral disease that can lead to paralysis. In contrast, diseases like tuberculosis and cholera are bacterial, while malaria is caused by a protozoan parasite, not a virus.
Q50. Multi-Drug Resistant Tuberculosis (MDR-TB) is defined as TB that is resistant to at least which two most powerful first-line anti-TB drugs?
Explanation
Multi-drug resistant tuberculosis is a specific form of the disease where the bacteria have developed resistance to at least isoniazid and rifampicin. These two drugs are the most powerful first-line medications used in standard tuberculosis treatment. Resistance to them makes the disease significantly harder and more expensive to treat, requiring the use of second-line drugs that may have more side effects.Answer key for these questions
| Q | Correct answer |
|---|---|
| 41 | (b) Pregnant women |
| 42 | (b) Weight in kg divided by square of height in meters |
| 43 | (a) II, IV, III, I |
| 44 | (d) Turmeric powder |
| 45 | (c) Drawing water out of microbial cells via osmosis |
| 46 | (b) Liver; Gallbladder |
| 47 | (d) B-lymphocytes |
| 48 | (a) Protection occurring when a large group is immune |
| 49 | (a) Rabies, Measles, Poliomyelitis |
| 50 | (d) Isoniazid and Rifampicin |
Key facts from Health, Environment and Agriculture
- The RPSC General Science syllabus includes human health and nutrition, environmental change, biodiversity and the agriculture of Rajasthan.
- Health questions pair a deficiency or a programme with its cause or target, for example iron with anaemia.
- Environment questions cover ecosystems, pollutants, laws and treaties, including carbon markets.
- Rajasthan agriculture questions deal with dryland farming, crops of the arid zones and the State’s agro-climatic zones.
- Science and technology, policies and defence are on the Science and Technology page.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Health, Environment and Agriculture?
This page has 662 practice MCQs on Health, Environment and Agriculture. Each has the correct answer, and most have an explanation.
Which chapters does this set cover?
Four chapters: human health, food, nutrition and public health programmes; environmental and ecological changes and their impact assessment; biodiversity, conservation of natural resources and sustainable development; and agriculture, horticulture, forestry and animal husbandry in Rajasthan.
Are health, environment and agriculture part of the RAS Prelims syllabus?
Yes. The General Knowledge and General Science paper includes human health, nutrition, environment, biodiversity and the agriculture sector of Rajasthan, so these topics can be asked every year.
How can I revise this part of the syllabus?
Make short lists of deficiency diseases, pollutants, laws and treaties, and Rajasthan crops and zones. Attempt each chapter, read the explanations of the misses and revisit the lists after a few days.