ICAR AIEEA (PG): Master's entrance, Veterinary Science and Animal Sciences · India · NTA for ICAR
Original practice questions written to the published syllabus · not past papersWhat feed is made of and how its value is measured: proximate analysis, energy partition, protein quality, minerals, vitamins, anti-nutritional factors and feed processing.
In the exams: ICAR AICE-JRF core group 05; ICAR AIEEA-PG 14 (Animal Nutrition); TNPSC Nutrition 20; RPSC (feeds of Rajasthan); EGEL Plus nutrition 13; ASRB NET (numerical problems, per coaching sources)
ICAR AIEEA (PG), Code 14 Animal Sciences (Animal Nutrition)
Weende fractions and their faults, Van Soest fibres, energy partition terms, TDN equation and the 2.25 factor, BV and NPU definitions, RDP/UDP, deficiency diseases by mineral and vitamin, anti-nutritional factors with their feeds, feed classes, and short calculations (digestibility, DCP, Pearson square).
How our questions for ICAR AIEEA spread across the units of Principles of Animal Nutrition & Feed Technology. Difficulty: 13 easy, 39 medium, 6 hard.
| Energy partition: GE, DE, ME and NE | 11 | |
| Proximate principles and Weende analysis | 6 | |
| Rumen-degradable and undegradable protein | 6 | |
| Principles of feed formulation | 6 | |
| Measures of protein quality: BV, NPU, CP and DCP | 5 | |
| Vitamins | 4 | |
| Feed additives | 4 | |
| Anti-nutritional factors | 4 | |
| Minerals | 3 | |
| Feed processing: grinding, chaffing, pelleting and feed blocks | 3 | |
| Classification of feeds | 2 | |
| Unconventional feeds | 2 | |
| Water | 1 | |
| The feed industry | 1 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
A straw has NDF 62%, ADF 38% and ADL 6% (DM basis, ash ignored). Its hemicellulose and cellulose contents are, respectively:
D. 24% and 32%
Hemicellulose = NDF - ADF = 62 - 38 = 24%. Cellulose = ADF - ADL = 38 - 6 = 32%. Taking all of ADF as cellulose (38%) forgets that ADF also contains lignin, and 56% (NDF - ADL) is hemicellulose plus cellulose together.
Further reading: Van Soest, Nutritional Ecology of the Ruminant, 2nd ed.
A calf consumes 120 g N; faecal N is 36 g, of which 12 g is metabolic faecal N. The true digestibility of nitrogen is:
D. 80.0%
True DC = [120 - (36 - 12)] / 120 x 100 = 80.0%. 70.0% is apparent digestibility; subtracting MFN as an extra loss (60.0%) goes in the wrong direction; 90.0% subtracts only the 12 g MFN from intake.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
In the ideal protein concept used in pig and poultry diets, each essential amino acid is expressed relative to:
A. Lysine set at 100
Lysine is the reference because it is usually first limiting in pig diets and its requirement is well defined.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
In a nitrogen balance study a pig eats 20 g N a day, excreting 5 g in faeces and 6 g in urine. The apparent biological value of the protein is:
B. 60.0%
Absorbed = 20 - 5 = 15 g; retained = 15 - 6 = 9 g. BV = 9/15 x 100 = 60.0%. 45.0% is NPU (retained/intake); 75.0% is apparent N digestibility; 40.0% is the share of absorbed N lost in urine (6/15).
Further reading: McDonald et al., Animal Nutrition, 7th ed.
Metabolisable protein supplied to a dairy cow is made up of:
B. Digestible microbial true protein plus digestible undegradable dietary protein
MP is the amino acid supply absorbed from the small intestine: microbial protein and UDP that are digested there. CP minus faecal N is DCP, the older measure.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
In ruminants, cobalt deficiency produces wasting and anaemia (pine, enzootic marasmus) because cobalt is needed:
D. By rumen microbes to synthesise vitamin B12
Cobalt is incorporated into vitamin B12 by rumen microbes. Iodine is needed for thyroxine and selenium for glutathione peroxidase.
Further reading: Suttle, Mineral Nutrition of Livestock, 4th ed.
The dietary Ca:P ratio generally recommended for most growing livestock (except laying hens) is about:
D. 1:1 to 2:1
A ratio of about 1:1 to 2:1 is widely advised; laying hens need far more calcium for eggshell. Reversed ratios with excess phosphorus lead to secondary hyperparathyroidism.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
The European Union banned antibiotic growth promoters in animal feed with effect from:
C. 1 January 2006
The EU ban took effect on 1 January 2006 under Regulation (EC) No 1831/2003, because of the risk of antimicrobial resistance.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
Under the international feed classification of Harris adopted by NRC, silages belong to class:
D. 3
Class 1 dry forages and roughages; 2 pasture and green forages; 3 silages; 4 energy feeds; 5 protein supplements.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
Mimosine, which causes hair loss and goitre when fed in excess, is found in:
B. Leucaena leucocephala
Mimosine and its goitrogenic metabolite DHP occur in Leucaena. Rumen bacteria that degrade DHP protect adapted ruminants.
Further reading: McDonald et al., Animal Nutrition, 7th ed.
Ten here, 58 in the app. The Laisha app has every practice question we have written to ICAR AIEEA in this subject, marked as you go, with timed papers, a jump-to-unanswered list and a certificate when you pass at 70 per cent.
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