Exam 3

Question 1

A structure derived from the surface coat of an emulsion that can be absorbed to enterocytes is:

Answer 1

Mixed micelle

Question 2

A lipolytic enzyme that completely hydrolyzes a triglyceride to a glycerol and three fatty acids is:

Answer 2

Intestinal lipase

Question 3

A type of lipid found in the core of an emulsion formed in the lumen of the GIT is:

Answer 3

Triglyceride

Question 4

A structure in an enterocyte where triglycerides are re-synthesized is:

Answer 4

Smooth Endoplasmic Reticulum

Question 5

LPL activity is increased by ____.

Answer 5

Insulin

Question 6

A lipoprotein mainly carrying cholesterol from non-hepatic peripheral tissues to the liver is:

Answer 6

HDL

Question 7

An enzyme responsible for fat loss (fat mobilization) in an animal body is:

Answer 7

Hormone sensitive lipase (HSL)

Question 8

Propionates are mainly used to synthesize glucose via ____

Answer 8

gluconeogenesis

Question 9

Beta-oxidation of LCFA generates ___

Answer 9

Acetyl-CoA

Question 10

Common benefits of lipid supplementation in animal feeds are

Answer 10

dust control, source of essential fatty acids, increased formula density.

Question 11

Supplementation of corn oil when supplementing lipids in animal feed benefits by:

Answer 11

increasing linoleic acid content in feeds where as reducing linolenic acid.

Question 12

What is the main cause of fatty liver?

Answer 12

Can’t form VLDL in the liver

Question 13

What is the main cause of ketosis?

Answer 13

Rapid buildup of acetyl-CoA in the liver.

Question 14

Which dietary modification would be beneficial for a dog with diabetes mellitus?

Answer 14

Increasing fiber content.

Question 15

To prevent ketosis in dairy cows during early lactation you should NOT

Answer 15

increase feeding of concentrates.

Question 16

Which is the major emulsifier secreted to the duodenum forming dietary fat to emulsions?

Answer 16

Bile acid

Question 17

Amino acids are:

Answer 17

the primary structure of a protein, zwitterions at pH 7, there are 20 of them naturally occuring.

Question 18

A group of essential amino acids is

Answer 18

Val, Leu

Question 19

An amino acid that is more hydrophilic than others is

Answer 19

Threonine

Question 20

Sulfure containing amino acids are

Answer 20

Cys and Met

Question 21

Amino acids that are essential only for poultry are

Answer 21

Pro and Gly

Question 22

An amino acid that is NOT abundant in collagen is

Answer 22

Tryptophan

Question 23

A type of protein with a function of immunological protection of an animal body is

Answer 23

Antibody

Question 24

An enzyme that activates typsinogen to trypsin is

Answer 24

Enterokinase

Question 25

Major limiting amino acids in corn and soybean meal based diets for animals are

Answer 25

Trp, Thr, Lys

Question 26

Animals have continuous protein turnover in the body. A main reason for this is:

Answer 26

Feasible regulation of concentrations of enzymes

Question 27

A set of 3 nucleotides found in mRNA containing genetic information copied from DNA is

Answer 27

Codon

Question 28

Transporters responsible for absorption of single amino acids in enterocytes are

Answer 28

System

Question 29

Dietary proteins with an amino acid ratio that matches to the animal's needs are called

Answer 29

ideal protein

Question 30

Nucleases are secreted from the ___ and hydrolyze ___ to ___.

Answer 30

Pancreas & small intestine; Nucleic acids to nucleotides.

Question 31

Rumen degradable protein fed to ruminants does what?

Answer 31

Becomes microbial protein.

Question 32

Which end product of rumen fermentation can be absorbed in the rumen?

Answer 32

Ammonia

Question 33

Which feedstuffs are excellent sources of RUP for ruminants?

Answer 33

Soybean meal dried at 266 and fish meal

Question 34

Both glucogenic and ketogenic amino acids are

Answer 34

Phe and Ile

Question 35

A correct sequence of the urea cycle is:

Answer 35

Orn-> Cit -> AS -> Arg - (Urea released) --> Orn ... and repeat

Question 36

Melatonin and serotonin are synthesized from

Answer 36

Trp

Question 37

Protein synthesis, phagocytic activity of macrophages, cytokine production by T-cells and antibody generation by B-Cell can be improved by

Answer 37

Gln

Question 38

What cellular system would be used to degrade a protein with a short half-life?

Answer 38

Proteasome

Question 39

Where does the translation in protein synthesis start on mRNA?

Answer 39

AUG