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Biochemistry > Lecture 24 - Carbohydrates > Flashcards

Lecture 24 - Carbohydrates Flashcards

1
Q

A natural sweetener; comprised of a glucose and fructose disachharide A. sucrose B. dietary fiber C. starch D. lactose

A

A. sucrose

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2
Q

Both insoluble and soluble; assists in water retention/GI motility (depending on the type) A. sucrose B. dietary fiber C. starch D. lactose

A

B. dietary fiber

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3
Q

Disaccharide of glucose and galactose; major dietary carbohydrates of animal origin A. sucrose B. dietary fiber C. starch D. lactose

A

D. lactose

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4
Q

A nutritional reservoir for plants. It is a polysaccharide of glucose A. Sucrose B. dietary fiber C. starch D. lactose

A

B. dietary fiber

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5
Q
A

Fructose

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6
Q
A

Glucose

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7
Q
A

Fructose

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8
Q
A

Ribose

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9
Q
A

Sucrose

alpha-1,6 linkage of ____ & fructose.

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10
Q

Long chain polysaccharides are attached to a ____ residue on the core protein and are connected by a ____ linkage.

A. Threonine; Gly-Xyl-Xyl

B. Ser; Xyl-Gal-Gal

C. Threonine; Xyl-Gal-Gal

D. Ser- Gly-Xyl-Xyl

A

B. Ser; Xyl-Gal-Gal

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11
Q
A

Dihydroxyacetone

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12
Q
A

Glyceraldehyde

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13
Q
A

Ribose

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14
Q
A

Fructose

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15
Q
A

Glucose

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16
Q
A

Mannose

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17
Q
A

Galactose

18
Q
A

Sucrose (A-1, B-2)

19
Q
A

Lactose (B-1, B-4)

20
Q
A

Maltose (alpha 1,4)

a glucose disaccharide

21
Q
A

alpha 1,4 on chains

beta 1,6 on branch

22
Q

Type of isomer?

A

Anomer

23
Q

Type of isomer?

A

Diastereomer (not a mirror image)

24
Q

Type of isomer?

A

epimer (several changes at chiral carbons)

25
Q

Type of isomer?

A

Enantiomer (non superimposable)

26
Q

What is the structure of ‘A?’

The structure of ‘B?’

A

A. Ketose

B. Aldose

27
Q

These modified sugars are important as modified saccharides. They are used as food additives and are important in lipid synthesis.

A. Sugar alcohols

B. Sugar esters

C. Acidic sugars

D. Acetylated amino sugars

E. Deoxaldose

A

A. Sugar alcohols

28
Q

These modified sugars are important as modified saccharides. Used in cell signalling, adhesion, and immune response

A. Sugar alcohols

B. Sugar esters

C. Acidic sugars

D. Acetylated amino sugars

E. Deoxaldose

A

D. Acetylated amino sugars (glycoproteins/glycolipids)

29
Q

These modified sugars are important as modified saccharides. Important in DNA synthesis

A. Sugar alcohols

B. Sugar esters

C. Acidic sugars

D. Acetylated amino sugars

E. Deoxaldose

A

E. Deoxyaldose

30
Q

These modified sugars are important as modified saccharides. Important in plasma membrane and cellular matrix formation

A. Sugar alcohols

B. Sugar esters

C. Acidic sugars

D. Acetylated amino sugars

E. Deoxaldose

A

C. Acidic sugars

31
Q

These modified sugars are important as modified saccharides. Important in formation of CNS gangliosides

A. Sugar alcohols

B. Sugar esters

C. Acidic sugars

D. Acetylated amino sugars

E. Deoxaldose

A

B. Sugar esters

32
Q

The core protein Serine and Xyl-Gal-Gal trisaccharide are joined by a(n) ____ linkage.

A. N-linkage

B. Phosphate ester

C. O-linkage

D. Hydrogen-bond

A

C. O-linkage

33
Q

GlcNAc residues are linked to Asn by _____ linkages.

A. O-linkages

B. Phosphodiester

C. Hydrogen bond

D. N-linkages

A

D. N-linked

34
Q

GlcNAc residues are linked to Ser by _____ linkages.

A. O-linkages

B. Phosphodiester

C. Hydrogen bond

D. N-linkages

A

A. O-linked

35
Q
A
36
Q
A
37
Q
A
38
Q

Is fructose an aldose/ketose?

A

Aldose

39
Q

Is ribose and aldose or ketose?

A

Aldose

40
Q

Is glucose and aldose or ketose?

A

Aldose

41
Q

Is mannose an aldose or ketose?

A

Aldose

42
Q

Is galactose and aldose or ketose?

A

Aldose

Biochemistry (43 decks)

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