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Biochemestry test

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CHAPTER 14 & 15

Question 1 of 10

1

Which is the only carbohydrate that we can not synthesize?

Select one or more of the following:

  • Starch

  • Vitamine C

  • Chitin

  • Sugar

  • Glucose

Explanation

Question 2 of 10

1

Which of these carbohydrates have in general a crystalline structure and a sweet flavor?

Select one or more of the following:

  • Monosaccharides

  • Homopolysaccharides

  • Heteropolysaccharides

  • Polyhydroxyaldehides

  • Polyhydroxyketones

Explanation

Question 3 of 10

1

Which of these is the precursor of the synthesis of some aromatic rings?

Select one or more of the following:

  • D-Glyceraldehide

  • D-Erythrose

  • D-Ribose

  • D-Galactose

  • D-Ribulose

Explanation

Question 4 of 10

1

Select the one/s which is/are present in glycolysis

Select one of the following:

  • D-Glyceraldehyde

  • D-Galactose

  • D-Glyceraldehide and D-Galactose

  • D-Glyceraldehide and dihydroxyacetone

  • Dihydroxyacetone and D-Galactose

Explanation

Question 5 of 10

1

Glucose can cycle leading to the formation of a new asymmetric carbon atom. How many carbon atoms have the beta-D-glucopyranose and where is pointing its hydroxyl group?

Select one or more of the following:

  • 6 Carbon atoms and it is pointing up

  • 6 Carbon atoms and it is pointing down

  • 5 Carbon atoms and it is pointing up

  • 5 Carbon atoms and it is pointing down

  • Any of these

Explanation

Question 6 of 10

1

Sorbitol is a sugar which is inside the group of...

Select one or more of the following:

  • Deoxysugars

  • Amino sugars

  • Acid sugars

  • Ester sugars

  • Any of these

Explanation

Question 7 of 10

1

Which of this is not true?

Select one or more of the following:

  • Sucrose does not have a reducing power and it is a oligosaccharide.

  • Polysaccharides are chains of 10 or more monosaccharides.

  • Starch and chitin are constituted only by alfa-Glucose that is linked by alfa (1-4) bonds.

  • Starch have a lot of non-reducing ends it its ramifications and only one reducing end.

  • Starch is only present in vegetables and if amylose and amylopectin is present they associate together forming helicoidal structures.

Explanation

Question 8 of 10

1

Which of these carbohydrates has more ramifications and how many?

Select one or more of the following:

  • Starch and has a ramification per 8-12 residues.

  • Glycogen and has a ramification per 8-12 residues.

  • Glycogen and has a ramification per 24-30 residues.

  • Starch and has a ramification per 24-30 residues.

  • Any of these

Explanation

Question 9 of 10

1

Which of these is responsible of fever?

Select one or more of the following:

  • Heterosides

  • Peptidoglycans

  • Proteoglycans

  • Glycoproteins

  • Lipopolysaccharides

Explanation

Question 10 of 10

1

Which of these is not true?

Select one or more of the following:

  • Glut 1 is important because it is the transporter that is present in red blood cells and in the brain

  • Glut 2 is present in the liver

  • Glut 3 is present in the brain

  • Glut 4 is the glucose transporter that is present in muscle and adipose tissue and it is sensible to insulin

  • In the intestine the amylase of the pancreatic fluid will break beta (1-4) bonds of carbohydrates

Explanation

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