ANSC 4405 Exam 4 UPDATED Exam
Questions and CORRECT Answers
Why Implant finishing cattle in the US? - CORRECT ANSWER - Since we castrate males
in order to improve meat quality(Marbling Tenderness Flavor), Safety, and behavior we need to
hormone replace to have better efficiency and ADG.
Be able to characterize the effects of implanting on cattle growth performance - CORRECT
ANSWER - Implants-Improve ADG 20%, Feed efficiency +10-15%, Hot carcass weight +
20 to 60 lb,
Response to implants- steers best, then heifers, then bulls
. Be able to characterize and exemplify major misconceptions beef consumers have regarding
estrogen levels in beef from implanted animals - CORRECT ANSWER - Estrogen in 3 oz
of implanted cattle = 1.9
Estrogen in soybean oil= 908,000 nanograms/lb
Estrogen in cabbage= 10,896
Be able to characterize consequences of improper sanitation and technique of implanting -
CORRECT ANSWER -
Be able to describe the classes of steroid implants and B-adrenergic agonists - CORRECT
ANSWER - Estrogenic: Natural-estradiol (E2) Synthetic-diesthylbestrol(DES) Estrogen
like-zeranol
Androgenic: Natural-testorone propionate synthetic-Trenbolone Acetate(TBA)
Progesterone(Pregnancy hormone): Natural-progesterone synthetic- melengestrol acetate(MGA)
Be able to differentiate modes of action between steroid implants and B-adrenergic agonists -
CORRECT ANSWER - Enhance lean accretion, reduce fat deposition β‐AA elicit
response by binding to β‐AR (Receptor) less adipose more protein tissue
, Whereas steroidal implants tend to increase muscle mass by increasing the accumulation of DNA
in muscle, beta-adrenergic agonists (β-AA) increase muscle mass by increasing the ratio of
protein to DNA
Be able to exemplify current commercially available B-adrenergic agonists dose, duration, and
withdraw period - CORRECT ANSWER - Ractopamine-HCl :Approved dosage 70 ‐430
mg/hd daily (90% DM) Commonly fed at 200 ‐300 mg/hd daily Duration 28 ‐42 d (before
harvesting) No withdrawal
Zilpaterol-HCl _ FDA approved but not on market since Aug/2013 Approved dosage 60 ‐90
mg/hd daily (90% DM) Duration: 20 ‐40 d (before harvesting) 3 d withdrawal period
Be able to explain the effects of the combination of implants and B-adrenergic agonists on beef
cattle growth performance II Hedging live cattle us - CORRECT ANSWER - Implants and
β‐AA modulate growth via separate mechanisms; when used in combination should achieve
additive response
Be able to define who are the futures market participants - CORRECT ANSWER - floor
brokers, professional speculators, scalpers, pit traders, floor traders
Be able to simply exemplify why and how can we use hedging as a management risk tool -
CORRECT ANSWER - protection against adverse price changes by taking a futures
position (expected price) opposite to cash position (actual price).
C. Be able to characterize the differences between live and feeder cattle contract specifications -
CORRECT ANSWER - live-70% choice; 30% select; YG 3; steer or heifer; born and
raised exclusively in the U.S.; steer[1050-1600] heifer 1050-1350) 40,000lb
feeder-(700-899 lb, steers, medium large # 1-2) 50,000lb
Be able to define and explain the terms "margin, basis, strike price, options, premium" on futures
market - CORRECT ANSWER - trader deposit margin with every new trade $/contract
basis=local cash price-futures price
options-producer has right to buy or sell at actual cash prizes taking advantage of actual cash
price fluctations you have to pay a premium for this right.
Questions and CORRECT Answers
Why Implant finishing cattle in the US? - CORRECT ANSWER - Since we castrate males
in order to improve meat quality(Marbling Tenderness Flavor), Safety, and behavior we need to
hormone replace to have better efficiency and ADG.
Be able to characterize the effects of implanting on cattle growth performance - CORRECT
ANSWER - Implants-Improve ADG 20%, Feed efficiency +10-15%, Hot carcass weight +
20 to 60 lb,
Response to implants- steers best, then heifers, then bulls
. Be able to characterize and exemplify major misconceptions beef consumers have regarding
estrogen levels in beef from implanted animals - CORRECT ANSWER - Estrogen in 3 oz
of implanted cattle = 1.9
Estrogen in soybean oil= 908,000 nanograms/lb
Estrogen in cabbage= 10,896
Be able to characterize consequences of improper sanitation and technique of implanting -
CORRECT ANSWER -
Be able to describe the classes of steroid implants and B-adrenergic agonists - CORRECT
ANSWER - Estrogenic: Natural-estradiol (E2) Synthetic-diesthylbestrol(DES) Estrogen
like-zeranol
Androgenic: Natural-testorone propionate synthetic-Trenbolone Acetate(TBA)
Progesterone(Pregnancy hormone): Natural-progesterone synthetic- melengestrol acetate(MGA)
Be able to differentiate modes of action between steroid implants and B-adrenergic agonists -
CORRECT ANSWER - Enhance lean accretion, reduce fat deposition β‐AA elicit
response by binding to β‐AR (Receptor) less adipose more protein tissue
, Whereas steroidal implants tend to increase muscle mass by increasing the accumulation of DNA
in muscle, beta-adrenergic agonists (β-AA) increase muscle mass by increasing the ratio of
protein to DNA
Be able to exemplify current commercially available B-adrenergic agonists dose, duration, and
withdraw period - CORRECT ANSWER - Ractopamine-HCl :Approved dosage 70 ‐430
mg/hd daily (90% DM) Commonly fed at 200 ‐300 mg/hd daily Duration 28 ‐42 d (before
harvesting) No withdrawal
Zilpaterol-HCl _ FDA approved but not on market since Aug/2013 Approved dosage 60 ‐90
mg/hd daily (90% DM) Duration: 20 ‐40 d (before harvesting) 3 d withdrawal period
Be able to explain the effects of the combination of implants and B-adrenergic agonists on beef
cattle growth performance II Hedging live cattle us - CORRECT ANSWER - Implants and
β‐AA modulate growth via separate mechanisms; when used in combination should achieve
additive response
Be able to define who are the futures market participants - CORRECT ANSWER - floor
brokers, professional speculators, scalpers, pit traders, floor traders
Be able to simply exemplify why and how can we use hedging as a management risk tool -
CORRECT ANSWER - protection against adverse price changes by taking a futures
position (expected price) opposite to cash position (actual price).
C. Be able to characterize the differences between live and feeder cattle contract specifications -
CORRECT ANSWER - live-70% choice; 30% select; YG 3; steer or heifer; born and
raised exclusively in the U.S.; steer[1050-1600] heifer 1050-1350) 40,000lb
feeder-(700-899 lb, steers, medium large # 1-2) 50,000lb
Be able to define and explain the terms "margin, basis, strike price, options, premium" on futures
market - CORRECT ANSWER - trader deposit margin with every new trade $/contract
basis=local cash price-futures price
options-producer has right to buy or sell at actual cash prizes taking advantage of actual cash
price fluctations you have to pay a premium for this right.
