ANSC 3010 EXAM 3 QUESTIONS WITH VERIFIED SOLUTIONS LATEST UPDATE 2026

ANSC 3010 EXAM 3 QUESTIONS WITH VERIFIED SOLUTIONS LATEST UPDATE 2026 What do the initials GRAs stand for? - Answers Generally recognized as safe What establishes the FDA as the regulatory agency governing commercial animal feeds? - Answers Food, Drug, and Cosmetic Act Which agency, as part of the Food and Drug Administration provides a forum for the membership and industry representation to safeguard the health of animals and humans. - Answers Association of American Feed Control Officials In the guaranteed analysis on the feed label, which of the following is not required? - Answers Minimum % ash Ionophores are commonly used feed additives in beef and diary cattle diets. We discussed many benefits of ionophores! a) In the rumen ionophores i. Favor the production of which volatile fatty acid? ii. Decrease the production of which gas? b) In addition to the 2 benefits above, list 2 other benefits of ionophores c) Why is a VFD statement not necessary when using ionophores in animal feed? - Answers a) i. Propionic acid ii. Methane b) Increase FE and decreased chance on ketosis c) No human counterpart One of the ionophores discussed in class is approved for calves and heifers, while another ionophore discussed in class is approved for lactating diary cows as well as young cattle.. Which ionophore is approved for both lactating and non-lactating dairy cattle? - Answers Rumensin Paylean and Optaflexx are beta adrenergic agonists that are legal for finishing swine and beef cattle, respectively. What is the actual repartitioning agent in these products? - Answers Ractopamine Zilmax is also a beta agonist used in beef cattle. It was a topic of controversy a few years ago, and Tyson and Cargill would not accept cattle that were fed Zilmax. What is the repartitioning agent in Zilmax? - Answers Zilpaterol hydrochloride Repartitioning agents repartition nutrients from _________ to __________ synthesis. - Answers Fat to protein As a "rule of thumb", a feed additive should return a minimum of __________ dollars or more for each dollar invested. - Answers $2 A direct feed microbial that consists of a live culture of a fungi and the media on which it was grown and dried. - Answers Yeast culture The only hormone-like product permitted as feed additive in U.S. is - Answers Mclengesterol acetate Polaxalene is added to feed to prevent - Answers Bloat Feed additives that may benefit the host animal by improving its gastrointestinal microbial balance and are often called a "Natural alternative to antibiotics" - Answers Probiotic What is meant by the term "ad libitum"? - Answers Animal can eat/drink as much as it wants Since feed ingredients in rations may vary widely in moisture content, we typically balance rations on a __________ basis. - Answers Dry matter What is generally recognized as the most authoritative source of nutrient requirement information for animals fed in the United States? - Answers National Research Council (NRC) Name two "steps" that are required when balancing a ration. (In other words, what 2 major pieces of information do we need before we can start doing the math; remember the picture of the "balance" in the notes) - Answers - Nutrient concentration - Amount of nutrients required by an animal daily You sent 2 samples of corn silage to Cumberland Valley analytical lab for nutrient analysis. They sent your results back in 2 different envelopes. Sample 1 came back with a value of 9% CP and was listed on a Dry Matter basis. Sample 2 came back 4% CP, but for some reason the lab technician reported this one on an as fed basis. Both samples are 70% moisture. Which sample has more CP, sample 1 or sample 2? Show your work. - Answers You are making a supplement that is 15% CP using wheat and soybean meal. The wheat is 90% DM, 10% CP on a DM basis. The soybean meal is 90% DM, 50% CP on a DM basis. Indicate how much wheat and SBM you will ACTUALLT USE to make 100 pounds of this diet. This diet is for a pig, so you can do this one on an as fed basis. - Answers Of course, when making a diet you must leave some "slack space" to add vitamins, minerals, and salt. For the diet in the previous question, we would like to leave 2.5% slack space. What would be the % CP in the mixture of wheat and SBM you would? (In other words, what would be the % CP to put in the middle of the "square"?) Don't work the entire problem again, just show how you would get the % CP in the wheat/SBM mix when leaving slack space. - Answers A 55 kg finishing lamb has the following daily nutrient requirements: CP: 200 g/day and TDN 1,300 g/day. Your feedstuffs available are steam rolled corn (9% CP and 88% TDN) and ryegrass hay (18% CP and 64% TDN). Set up the simultaneous equations you need to balance this ration. If you solved it you would end up with grams of corn and hay, but you don't have to solve the equations - just show me how you would set them up! - Answers CP: 0.09x + 0.18y = 200 TDN: 0.88x + 0.64y = 1,300 Use the feed label on the last page to answer the following: a) The ingredients list on this tag indicates several "collective terms". For each collective term below, list a possible feedstuff that the company may be using in this feed. i. Plant protein sources ii. Grain products b) In addition to the active drug in this calf starter, what other feed additive is included? - Answers a) i. Soybean ii. Wheat b) ? not anticoccidial