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Past Questions
Method demonstration works on the principle of-
A)
Learning is believing
B)
Learning is teaching
C)
Seeing and doing
D)
Learning by doing
In Extension Education, a 'Method Demonstration' is a teaching tool used to show a group of people how to perform a specific task or skill (e.g., how to treat seeds or how to calibrate a sprayer). The fundamental principle behind this method is 'Learning by doing.' It involves a practical approach where the learner is encouraged to participate in the process to acquire a psychomotor skill.
Distinction from other options:
- 'Seeing and doing' (Option c) is a component of the process, but the pedagogical principle is formally defined as 'Learning by doing'.
- 'Learning is believing' (Option a) is more closely associated with 'Result Demonstrations,' where farmers see the final outcome (the result) of a new technology to believe in its efficacy.
- 'Learning is teaching' (Option b) is not a standard principle of demonstration methods in extension education.
Which of the following is a saturated fatty acid?
A)
Linoleic acid
B)
Linolenic acid
C)
Archidonic acid
D)
Stearic acid
To determine which fatty acid is saturated, we must look at the chemical structure of each option. A saturated fatty acid is one that has no double bonds between the carbon atoms in its hydrocarbon chain, meaning it is 'saturated' with hydrogen atoms.
1. **Linoleic acid (Option a):** This is a polyunsaturated omega-6 fatty acid with two double bonds in its chain. It is an essential fatty acid.
2. **Linolenic acid (Option b):** This is a polyunsaturated omega-3 fatty acid (specifically alpha-linolenic acid) with three double bonds in its chain. It is also an essential fatty acid.
3. **Arachidonic acid (Option c):** This is a polyunsaturated omega-6 fatty acid with four double bonds in its chain, derived from linoleic acid.
4. **Stearic acid (Option d):** This is a long-chain saturated fatty acid with the formula CH3(CH2)16COOH. It contains 18 carbon atoms and zero double bonds, making it fully saturated.
Therefore, Stearic acid is the only saturated fatty acid among the given choices.
Gross energy value is highest in -
A)
Protein
B)
Carbohydrate
C)
Fat
D)
Mineral
Gross energy (GE) is the total chemical energy contained in a feed substance, typically measured by complete combustion in a bomb calorimeter. The energy value of nutrients varies based on their chemical composition (specifically the ratio of carbon, hydrogen, and oxygen).
1. **Fat (Lipids):** Fats are the most energy-dense nutrients. They provide approximately 9.4 kcal/g (or 38.9 kJ/g). This high value is due to the high proportion of carbon-hydrogen bonds, which release more energy upon oxidation.
2. **Protein:** Proteins provide approximately 4.1 kcal/g (or 17.2 kJ/g).
3. **Carbohydrates:** Carbohydrates provide approximately 4.1 kcal/g (or 17.2 kJ/g).
4. **Minerals:** Minerals are inorganic substances and do not provide any caloric energy (0 kcal/g).
Therefore, among the given options, fat has the highest gross energy value.
MSME stands for-
A)
Micro Small and Medium Enterprises
B)
Micro Small and Marginal Enterprises
C)
Micro Small and Mega Enterprises
D)
Medium Small and Micro Enterprises
MSME is a widely used acronym in economics and entrepreneurship, particularly in the context of government policy in India (under the MSMED Act, 2006). It stands for 'Micro, Small and Medium Enterprises'. These enterprises are categorized based on their investment in plant and machinery or equipment and their annual turnover.
- Option (a) is correct as it accurately reflects the terminology used by regulatory bodies.
- Option (b) is incorrect because 'Marginal' is not the standard term used in the MSME classification; 'Medium' is the correct third tier.
- Option (c) is incorrect because 'Mega' refers to large-scale industries, which are the opposite of MSMEs.
- Option (d) is incorrect because while it contains the correct words, the standard nomenclature and hierarchical order is Micro, Small, and then Medium.
The causal components of phenotypic variance (Vp) are-
A)
Vg and Ve
B)
Vp and Ve
C)
Va and Ve
D)
Vd and Ve
In quantitative genetics, the phenotypic variance (Vp) of a trait in a population is the total observed variation. This variance is primarily caused by two main components: Genetic Variance (Vg) and Environmental Variance (Ve). The fundamental equation is Vp = Vg + Ve.
1. Vg (Genetic Variance): The portion of the phenotypic variance that is attributable to genetic differences among individuals. Vg can be further subdivided into additive variance (Va), dominance variance (Vd), and epistatic variance (Vi).
2. Ve (Environmental Variance): The portion of the phenotypic variance caused by environmental factors (e.g., nutrition, climate, management).
Analysis of options:
- Option (a) Vg and Ve: Correct. These are the two primary causal components of Vp.
- Option (b) Vp and Ve: Incorrect. Vp is the total variance itself, not a component of itself.
- Option (c) Va and Ve: Incorrect. While Va (additive variance) is a part of Vp, it is a sub-component of Vg. This option ignores dominance and epistatic genetic effects.
- Option (d) Vd and Ve: Incorrect. While Vd (dominance variance) is a part of Vp, it is a sub-component of Vg. This option ignores additive and epistatic genetic effects.
Hinny is obtained by crossing-
A)
Zebra X Horse
B)
Jack X Zebra
C)
Jack X Mare
D)
Jennet X Stallion
In animal breeding, hybrids between horses and donkeys are common. To distinguish between a Mule and a Hinny, one must look at the parentage:
1. **Mule**: The offspring of a male donkey (Jack) and a female horse (Mare). This is the most common cross.
2. **Hinny**: The offspring of a male horse (Stallion) and a female donkey (Jennet).
Analyzing the options:
- Option (a) Zebra X Horse results in a Zorse.
- Option (b) Jack X Zebra is not a standard commercial cross for a Hinny.
- Option (c) Jack X Mare results in a Mule.
- Option (d) Jennet (female donkey) X Stallion (male horse) results in a Hinny.
Therefore, a Hinny is specifically obtained by crossing a female donkey with a male horse.
The crude protein requirement in broiler finisher feed is-
A)
12%
B)
20%
C)
23%
D)
32%
In broiler nutrition, protein requirements decrease as the bird ages. Broiler diets are typically divided into three phases: Starter, Grower, and Finisher.
1. **Starter Feed (0-10 days):** Requires the highest protein levels (typically 22-23%) to support rapid muscle development and organ growth.
2. **Grower Feed (11-24 days):** Protein levels are slightly reduced (typically 20-21%).
3. **Finisher Feed (25 days to market):** The protein requirement is the lowest among the three phases, generally ranging from 18% to 20%. This is because the bird's growth rate slows down slightly, and the focus shifts toward weight gain and fat deposition.
Analyzing the options:
- Option (a) 12% is too low and would lead to stunted growth.
- Option (b) 20% falls within the standard recommended range for broiler finisher diets.
- Option (c) 23% is characteristic of a Starter diet.
- Option (d) 32% is excessively high and would be economically wasteful and potentially harmful to the bird's kidneys.
Which layer of intestine of animals is used as casing?
A)
Mucosal layer
B)
Sub mucosal layer
C)
Muscular layer
D)
Serous layer
In meat science and sausage production, natural casings are derived from the intestines of animals (typically pigs, sheep, or cattle). The intestinal wall consists of several layers: the mucosa (innermost), the submucosa, the muscularis, and the serosa (outermost). To produce a casing that is strong, elastic, and permeable, the mucosa and the muscular/serous layers are chemically or mechanically removed. The remaining layer is the submucosa. This layer is composed primarily of collagen and elastin, providing the necessary structural integrity and flexibility to hold the meat emulsion during stuffing and cooking without bursting.
- Option (a) Mucosal layer: This is the innermost lining and is removed because it is too fragile and contains mucus.
- Option (c) Muscular layer: This layer is removed as it is too thick and does not possess the desired casing properties.
- Option (d) Serous layer: This is the outermost protective layer and is removed during the cleaning process.
Yellow colouration of milk fat or yellow tinge of cow milk is attributed to-
A)
Tocopherol
B)
Sterol
C)
β-carotene
D)
Vitamin A
The yellow coloration of cow milk is primarily due to the presence of β-carotene, a pigment found in the green fodder (grasses) that cows consume. Cows are unable to convert all the β-carotene from their diet into Vitamin A in the mammary glands, so a significant amount remains in the milk fat, giving it a characteristic yellow tinge. In contrast, buffaloes are highly efficient at converting β-carotene into colorless Vitamin A, which is why buffalo milk appears whiter.
Analysis of other options:
- a. Tocopherol: This is Vitamin E, which is colorless and does not contribute to the pigment of milk.
- b. Sterol: These are steroid alcohols (like cholesterol) and are colorless.
- d. Vitamin A: While β-carotene is a precursor to Vitamin A (provitamin A), Vitamin A itself (retinol) is colorless. The yellow color is specifically attributed to the carotenoid pigment, not the resulting vitamin.
Exudation of water from frozen meat is known as-
A)
Weep
B)
Shrink
C)
Drip
D)
Sweat
In meat science, 'drip loss' refers to the exudation of water and water-soluble proteins from meat during thawing or after freezing. When meat is frozen, ice crystals form; if these crystals are large (due to slow freezing), they rupture the cell membranes of the muscle fibers. Upon thawing, the damaged cells cannot reabsorb the water, leading to the leakage of fluid known as 'drip'.
- Option (a) 'Weep' is not a standard technical term in meat science for this process.
- Option (b) 'Shrink' (or shrinkage) typically refers to the loss of weight due to evaporation of moisture during aging or cooking, rather than the exudation of liquid from frozen meat.
- Option (d) 'Sweat' usually refers to surface condensation of moisture from the air onto a cold surface, rather than the internal fluid loss from the meat tissue itself.
The most accurate aid to selection is-
A)
Progeny testing
B)
Herd selection
C)
Pedigree selection
D)
Individual selection
In animal breeding, the 'accuracy of selection' refers to the correlation between the true breeding value (BV) of an animal and the selection index used to estimate it.
1. **Progeny Testing (Option a):** This is considered the most accurate method because it evaluates the genetic merit of an individual based on the actual performance of its offspring. Since the offspring express the genes passed from the parent, the average performance of the progeny provides the most reliable estimate of the parent's breeding value, especially for traits with low heritability (like fertility or milk production).
2. **Pedigree Selection (Option c):** This relies on the records of ancestors. While useful, it is less accurate than progeny testing because it does not account for the specific genetic combination passed to the current individual.
3. **Individual Selection (Option d):** Also known as mass selection, this relies solely on the animal's own phenotype. Its accuracy depends heavily on heritability; for traits with low heritability, it is very inaccurate.
4. **Herd Selection (Option b):** This is a general management approach rather than a specific technical aid to selection for individual genetic merit.
Therefore, because progeny testing directly measures the transmissible genetic component, it provides the highest accuracy.
Efficiency of pasteurization can be determined by estimating the enzyme-
A)
Oxidoreductase
B)
Lactoperoxidase
C)
Xanthine oxidase
D)
Alkaline phosphatase
Pasteurization is a heat-treatment process designed to eliminate pathogenic microorganisms from milk. To verify that the process was successful, the 'Alkaline Phosphatase Test' is used. Alkaline phosphatase is an enzyme naturally present in raw milk that is slightly more heat-resistant than the most heat-resistant non-spore-forming pathogens (such as Coxiella burnetii). Therefore, if the heat treatment was sufficient to kill the pathogens, the alkaline phosphatase enzyme will also be inactivated. If the enzyme is still detectable in the milk after pasteurization, it indicates either under-processing (insufficient heat) or contamination with raw milk.
Why other options are incorrect:
- Oxidoreductase: This is a broad class of enzymes that catalyze oxidation-reduction reactions; it is not used as a specific marker for pasteurization.
- Lactoperoxidase: This enzyme is involved in the natural antimicrobial system of raw milk and is used in the 'Lactoperoxidase system' for preserving raw milk in areas without refrigeration, but it is not the standard marker for pasteurization efficiency.
- Xanthine oxidase: This enzyme is involved in purine metabolism and has no role in determining the efficiency of milk pasteurization.
Who is the Father of the White Revolution in India?
A)
M.S. Swaminathan
B)
Durgesh Patel
C)
B.V. Rao
D)
Verghese Kurien
Dr. Verghese Kurien is widely recognized as the 'Father of the White Revolution in India'. He was the chief architect of 'Operation Flood', the world's largest dairy development program, which transformed India from a milk-deficient nation into the world's largest milk producer. He founded the National Dairy Development Board (NDDB) and played a pivotal role in the success of the Amul cooperative model in Anand, Gujarat.
Analysis of other options:
- M.S. Swaminathan: Known as the 'Father of the Green Revolution in India' for his role in introducing high-yielding varieties of wheat and rice.
- Durgesh Patel: While involved in cooperative movements, he is not the primary figure associated with the White Revolution.
- B.V. Rao: Not the recognized leader of the White Revolution.
Meat of deer is called as-
A)
Chevon
B)
Deer Mutton
C)
Menison
D)
Venison
In meat science, specific terms are used to denote the meat derived from different animals.
1. **Venison (Option d):** This is the correct term for the meat of deer. The word is derived from the Old French 'venaison', which comes from the Latin 'venari' (to hunt).
2. **Chevon (Option a):** This refers specifically to the meat of an adult goat. (Young goat meat is often called 'cabrito').
3. **Deer Mutton (Option b):** This is an incorrect term. 'Mutton' specifically refers to the meat of a mature sheep.
4. **Menison (Option c):** This is not a recognized term in meat science or culinary terminology.
Therefore, the meat of deer is correctly identified as Venison.
FSSAI stands for-
A)
Food Safety and Standards Authority of India
B)
Food Standards and Safety Act of India
C)
Food Safety and Standards Act of India
D)
Food Security and Supply Authority of India
FSSAI stands for the Food Safety and Standards Authority of India. It is an autonomous body established under the Ministry of Health & Family Welfare, Government of India, under the Food Safety and Standards Act, 2006. Its primary role is to lay down science-based standards for articles of food and to regulate their manufacture, storage, distribution, sale, and import to ensure food safety for human consumption.
Analysis of other options:
- Option (b) 'Food Standards and Safety Act of India' is incorrect because FSSAI is the Authority (the body), not the Act itself.
- Option (c) 'Food Safety and Standards Act of India' is incorrect for the same reason; the Act is the legislation that created the Authority.
- Option (d) 'Food Security and Supply Authority of India' is incorrect as the organization focuses on 'Safety and Standards', not 'Security and Supply'.
A quick test to determine the developed acidity and the suitability of milk for heat processing-
A)
Sediment test
B)
Organoleptic tests
C)
MBRT
D)
Clot-on-Boiling (COB) test
The Clot-on-Boiling (COB) test is a rapid platform test used in the dairy industry to determine if milk is suitable for heat processing (such as pasteurization or sterilization). When milk has a high developed acidity (usually due to the growth of lactic acid bacteria converting lactose to lactic acid), the proteins (casein) become unstable. Upon heating/boiling, this acidity causes the proteins to coagulate or 'clot'. If milk clots during this test, it is rejected as it would also coagulate during industrial heat processing.
Why other options are incorrect:
- a. Sediment test: Used to detect impurities, dirt, or leucocytes in milk, not acidity.
- b. Organoleptic tests: These are sensory evaluations (smell, taste, appearance) which are subjective and not a precise 'test' for heat stability.
- c. MBRT (Methylene Blue Reduction Test): This test measures the microbial load and metabolic activity of bacteria in milk; it indicates the overall quality and hygiene but is not a direct test for developed acidity or heat stability.
Which of the following reflects the financial position of a business organisation -
A)
Journal
B)
Balance Sheet
C)
Trial Balance
D)
Profit and Loss account
The financial position of a business refers to its assets, liabilities, and equity at a specific point in time.
1. **Balance Sheet (Correct):** This is a financial statement that reports a company's assets, liabilities, and shareholders' equity from a specific date. It provides a 'snapshot' of what the company owns and owes, thereby reflecting its overall financial position.
2. **Journal (Incorrect):** The journal is the book of original entry where transactions are recorded chronologically. It is a record of events, not a summary of financial position.
3. **Trial Balance (Incorrect):** A trial balance is a bookkeeping worksheet in which the balances of all ledgers are compiled into debit and credit columns to ensure mathematical accuracy before preparing financial statements. It does not represent the final financial position.
4. **Profit and Loss account (Incorrect):** Also known as the Income Statement, this reflects the financial performance (profitability) of a business over a period of time (revenue minus expenses), rather than its overall financial position (assets and liabilities).
Progeny testing is done to select-
A)
Dam
B)
Sire
C)
Full sib
D)
Half sib
Progeny testing is a method of evaluating the genetic merit of an animal based on the performance of its offspring. In animal breeding, this method is primarily used to select the 'Sire' (the male parent). The reasoning is based on efficiency and scale: a single sire can produce hundreds or thousands of offspring (progeny) through artificial insemination, providing a large sample size to accurately estimate the sire's breeding value. In contrast, a 'Dam' (female parent) produces very few offspring in her lifetime, making progeny testing for dams slow, expensive, and statistically unreliable. While full-sibs and half-sibs are used in sibling testing or family selection, the specific application of 'progeny testing' as a standard industry tool is designed for sire selection to maximize genetic gain across a population.
Which of the following biochemical properties affects the texture and sensory characteristics of fruits during processing?
A)
Pectin content and cell wall integrity
B)
Carotenoid concentration and fat content
C)
Moisture activity and amino acid profile
D)
Chlorophyll concentration and mineral content
Texture in fruits is primarily determined by the structural components of the plant cell wall. Pectin is a complex polysaccharide found in the primary cell walls and the middle lamella (the layer that glues adjacent cells together). During ripening and processing, enzymes like pectinmethylesterase (PME) and polygalacturonase (PG) break down pectin, leading to a loss of cell wall integrity and resulting in softening of the fruit texture. This biochemical change directly affects the 'mouthfeel' and sensory characteristics of the processed product.
Why other options are incorrect:
- Option b: Carotenoids affect color (sensory), but fat content is generally negligible in most fruits and does not dictate the primary texture.
- Option c: Moisture activity (water activity) affects shelf-life and microbial growth, and amino acid profiles affect nutritional value/flavor, but they are not the primary drivers of structural texture.
- Option d: Chlorophyll affects the green color of the fruit, and mineral content affects nutrition, but neither determines the physical texture or structural integrity of the fruit tissue.
Who coined the term acid rain?
A)
Christ Ralph
B)
Elmer Joseph Clark
C)
Ernest Flower
D)
Robert Angus Smith
The term 'acid rain' was coined by Robert Angus Smith, an English chemist and industrial pollution expert, in 1852 (and further detailed in his 1872 book 'Air and Rain'). While studying the air pollution in Manchester, England, he discovered that the rain contained sulfuric acid due to the combustion of coal in the industrial city.
Analysis of other options:
- Options a, b, and c (Christ Ralph, Elmer Joseph Clark, and Ernest Flower) are not recognized in scientific literature as the originators of the term 'acid rain'. Robert Angus Smith is universally credited in environmental science textbooks as the pioneer who first identified and named the phenomenon.
The primary purpose of silo in agricultural storage is to-
A)
Maintain high moisture levels
B)
Store grain at high temperatures
C)
Store bulk quantities of dry materials for extended periods
D)
Remove pests from stored grains
A silo is a large-scale storage structure designed specifically for the bulk storage of grains, seeds, or fermented feed (silage). The primary objective of a silo is to protect large quantities of agricultural produce from environmental factors, pests, and moisture to ensure they can be stored for extended periods without significant spoilage.
Analysis of options:
- Option (a) is incorrect because high moisture levels lead to fungal growth and spoilage; silos are used to keep grains dry.
- Option (b) is incorrect because high temperatures accelerate the respiration of grains and promote pest activity; silos are often designed for temperature control or aeration to keep grains cool.
- Option (c) is correct as it describes the fundamental engineering purpose of a silo: bulk storage and long-term preservation.
- Option (d) is incorrect because while silos can be fumigated to remove pests, the 'primary purpose' of the structure itself is storage, not the process of pest removal.
For safe storage of rice grain, seed moisture content should be-
A)
6-8%
B)
11-12%
C)
14-16%
D)
16-18%
Safe storage moisture content is the maximum moisture level at which a grain can be stored without significant deterioration from molds, fungi, or insect infestation. For rice (and most cereal grains), the generally accepted safe moisture content for long-term storage is between 11% and 13%.
1. Option (a) 6-8%: This is too low. Drying grains to this level can cause 'stress cracking' or fissuring in rice kernels, which leads to breakage during milling, reducing the head rice recovery (HRR).
2. Option (b) 11-12%: This is the ideal range. It is low enough to inhibit the growth of most storage fungi (like Aspergillus) and reduce the activity of storage pests, while remaining high enough to maintain the physical integrity of the grain.
3. Option (c) 14-16%: This is considered high for long-term storage. At this level, the risk of mold growth and heating of the grain mass increases significantly, especially in humid conditions.
4. Option (d) 16-18%: This is far too high for safe storage and would lead to rapid spoilage, sprouting, or severe fungal infestation.
Demand for goods which are needed for further production is called-
A)
Derived demand
B)
Autonomous demand
C)
Direct demand
D)
Cross demand
Step-by-step reasoning:
1. **Definition of Derived Demand**: In economics, derived demand occurs when the demand for a good or service results from the demand for another final product. In other words, the good is not desired for its own sake, but because it is a necessary input (factor of production) to produce something else.
2. **Application to Agriculture**: For example, the demand for fertilizers, seeds, or tractors is 'derived' from the consumer demand for crops like wheat or corn. If the demand for wheat increases, the demand for the inputs used to produce it also increases.
3. **Analysis of other options**:
- **Autonomous demand**: This refers to demand that is independent of the level of income or other variables (often used in macroeconomic models).
- **Direct demand**: This is the demand for a final product that provides direct utility to the consumer (e.g., demand for a loaf of bread).
- **Cross demand**: This refers to how the demand for one good changes in response to a price change of another good (substitutes or complements).
Therefore, since the question specifies goods needed for 'further production', it describes Derived Demand.
Demand for agricultural products is relatively-
A)
Less Elastic
B)
More Elastic
C)
Less Inelastic
D)
More Inelastic
In economics, the price elasticity of demand measures how much the quantity demanded of a good responds to a change in the price of that good. Agricultural products, particularly staple foods (like wheat, rice, and corn), are characterized by 'inelastic demand' (or being 'less elastic'). This is because: 1. Necessity: Food is a basic human necessity; people must consume it regardless of price increases. 2. Lack of Substitutes: For many staple crops, there are few close substitutes that can completely replace them in a diet. 3. Low Proportion of Income: For many consumers, the cost of a specific staple crop represents a small fraction of their total budget, making them less sensitive to price changes. Therefore, a significant change in price leads to a relatively small change in the quantity demanded. 'Less Elastic' is synonymous with 'Inelastic' in this context.
The farm from which 50% or more income is derived from a single enterprise is called-
A)
Intensive farming
B)
Specialized farming
C)
Diversified farming
D)
Mixed farming
In agricultural economics and farming systems, farms are categorized based on the distribution of their income sources.
1. **Specialized Farming**: A farm is considered specialized when 50% or more of its total income is derived from a single enterprise (e.g., only wheat production, only dairy, or only poultry). This system focuses on maximizing the efficiency of one specific product.
2. **Diversified Farming**: This is the opposite of specialized farming. A farm is diversified when no single enterprise contributes 50% or more to the total income. It spreads risk across multiple enterprises.
3. **Mixed Farming**: This specifically refers to the integration of crop production and livestock rearing on the same farm. While mixed farming is a form of diversification, the term 'diversified' is the broader economic classification regarding income percentages.
4. **Intensive Farming**: This refers to the input level (high capital, labor, and fertilizer per unit area) rather than the source of income distribution.
Therefore, since the question specifies that 50% or more of the income comes from a single enterprise, it is defined as Specialized Farming.