ANSC 3010 EXAM 3 QUESTIONS WITH VERIFIED
ANSWERS
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
ANSWERS
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
