Proteins Flashcards

1
Q

How many essential amino acid are there?

A

10

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2
Q

Is protein an essential or non- essential nutrient?

A

Essential

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3
Q

What is true protein?

A

Nitrogen only found in amino acids

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4
Q

What is crude protein?

A

True protein and NPN

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5
Q

Why do producers only want the specific amount of protein that maximizes productivity in their animals?

A

Because protein is one of the most costly nutrients found in feedstuff

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6
Q

Daily protein intake can be calculated by..

A

DM x (% protein/100)

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7
Q

Around what percentage of dry matter is protein?

A

50%

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8
Q

What is protein made of?

A

C, H, O, N (S and P)

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9
Q

What is the common unit of proteins?

A

Amino acids

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10
Q

What are amino acids linked by?

A

Peptide bonds

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11
Q

Does the percent of protein change over time?

A

No

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12
Q

What is an example of protein function in cell membrane?

A

The sodium- potassium pump for glucose absorption

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13
Q

Proteins are the principal what?

A

Organic chemical constituent

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14
Q

What are the 6 types of proteins we can find in the body?

A

Fibrous, motor, hormones, transport, immune, energy

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15
Q

Collagen and elastin are a what type of protein?

A

Fibrous

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16
Q

What are 2 motor or contractile proteins?

A

Actin and myosin

17
Q

Immune proteins…

A

Antibodies

18
Q

Why can proteins b considered an energy source?

A

Because they are usually the last dietary ingredient to be used for energy

19
Q

Why would we need protein on continuos supply?

A

Because of the metabolic turnover process

20
Q

What percentage is N in a protein molecule?

A

Approx.16%

21
Q

Which protein structures are linear and linked by peptide bonds?

A

Primary

22
Q

A structure with a chain twisting into coils and has H-bonds?

A

Secondary

23
Q

If secondary structures group and become globular, what is it called?

A

Tertiary

24
Q

The large protein complex that animals actually eat and that is denatured by enzymes is?

A

Quarternary

25
Q

Structure and essentiality are ways to what?

A

Classify proteins

26
Q

A chain ot more than 10 amino acids is considered a what?

A

Polypeptide

27
Q

A 4-10 chain of amino acids is an?

A

Oligopeptide

28
Q

The 3 types of amino acids are?

A

Non-essential, essential, conditionally essential

29
Q

An amino acid considered dispensable because the body can create it is considered?

A

Non-essential

30
Q

Indispensable amino acids are?

A

Essential

31
Q

What are the 10 essential amino acids?

A

PVT TIM HALL

32
Q

An amino acid that is usually non-essential but essential under certain conditions is?

A

Conditionally essential

33
Q

In terms of chemistry, what 3 things can amino acids be?

A

Neutral, basic, acid

34
Q

When comparing food proteins, what is an important concept to have in mind to understand now protein synthesis can be affected?

A

Limiting amino acids

35
Q

If there is an excess of essential amino acids, but one is short what happens to protein synthesis?

A

It stops completely