Protein chemistry

20

How many amino acids are there?

False

True or False. Older animals have higher protein requirements than younger animals.

N x 6.25

What is the formula to measure crude protein?

16%

What is the average % of Nitrogen content in protein?

Act as antibodies, transportation, tissue structure

What are the functions of proteins?

Collagen

What is connective tissue made up of?

Keratin

What are hair, wool, hooves made up of?

It’s on the website Sarah gave you

Study the essential amino acids

Non-essential

What amino acids are made by the body: essential or non-essential?

Essential

What amino acids are not made by the body: essential or non-essential?

Proline and Taurine

What are the 2 conditionally essential amino acids?

50:50

What is the ratio of essential and nonessential amino acids in pig and poultry rations?

Primary

What protein structure is a linear sequence of amino acids that are linked by peptide bonds?

Secondary

What protein structure is determined by the shape of the protein due to hydrogen bonding between carboxyl (C=O) and amino groups (N-H)?

Tertiary

What protein structure is the folding and coiling of protein (polypeptides) into globular 3D structure?

Quaternary

What protein structure is the alignment of several tertiary structures to form a single protein?

Simple (globular)

What classification of proteins is determined by those yielding only amino acids or their derivatives on hydrolysis; abundant in nature?

Fibrous

What classification of proteins constitute about 30% of total protein in animal body; connective tissue?

Conjugated

What classification of proteins are those in which simple proteins are combined with a nonprotein radical?

True protein

What type of protein is composed only of amino acids?

Limiting amino acid

What is the essential amino acid found in shortest supply relative to amounts needed for protein synthesis?

Complete protein

What is the protein containing all amino acids essential in animal and human nutrition in amounts adequate for physiological use?

Complementary protein

What are two or more proteins whose amino acid assortments complement each other so that missing essential amino acids in one are provided by the other(s)?

Reference protein

What are the egg protein, used by FAO/WHO as standard?

Urea

What is toxic to horses in a large amount and is derived from a certain type of feed?

Nonprotein nitrogen

What are compounds that are not true protein in nature but contain N and can be converted to protein by bacterial action?

Crude protein

What is protein composed of true protein and any other nitrogenous product?

Digestible protein

What is that portion of crude protein which the animal can digest; represented by the difference between what is present in the feed and what appears in the feces?

Protein quality

What refers to the amount and ratio of essential amino acids present in a protein?

Amino acid profile

What is the content of individual amino acids (on a digestible basis) is compared with that needed by the animal (“requirement”)?

Biological value

What is a measure of the relationship of protein (or N) retention to protein (or N) absorption?

Net protein utilization

What measures efficiency of growth by comparing body N content resulting from feeding a test protein with that resulting from feeding a comparable group of animals a protein-free diet from the same length of time?

Protein efficiency ratio

What procedure involving a feeding trial in which protein sources are compared in terms of gain in animal body weight per gram of protein or nitrogen?