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NBDE Biochem > Biological compounds > Flashcards

Biological compounds Flashcards

1
Q

a-amylase cleaves

A

a 1,4 linkages

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2
Q

b-amylase cleaves

A

a 1,4 linkages

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3
Q

y-amylase (glucamylase) cleaves

A

a 1,4 and a 1,6 linkages

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4
Q

hydrolysis products of a-amylase

A

maltose + dextrins

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5
Q

hydrolysis products of b-amylase

A

maltose

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6
Q

hydrolysis products of y-amylase (glucamylase)

A

glucose

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7
Q

starch linked by _____ bonds

A

a 1,4 glycosidic

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8
Q

glycogen linked by ______ bonds

A

a 1,6 glycosidic

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9
Q

glycogen phosphorylase cleaves

A

a 1,4 linkages

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10
Q

glucantransferase

A

exposes a 1,6 branch points

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11
Q

amylo-a1,6 glucosidase cleaves

A

a 1,6 linkages

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12
Q

starch contains _____ and ______

A

amylase and amylopectin

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13
Q

amylopectin is (branched/unbranched)

A

branched a1,6

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14
Q

amylase is (branched/unbranched)

A

helical, unbranched

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15
Q

used to determine GFR

A

inulin - homopolymer of fructose

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16
Q

most abundant GAG

A

chondroitin sulfate

17
Q

homopolymer of b-d-glucopyranose

A

cellulose

18
Q

from where are glycolipids derived

A

ceramide

19
Q

location of von ebner’s glands

A

circumvallate papillae of tongue

serous secretion

20
Q

parotid gland secretion

A

serous

21
Q

sublingual gland secretion

A

mucous

22
Q

submandibular gland secretion

A

mixed

23
Q

Vitamine C is needed for

A

lysine and proline hydroxylation for collagen formation

24
Q

tropocollagen

A

endopeptidases cleave N and C terminal ends on procollagen&raquo_space; tropocollagen

molecules cross link to make collagen fibrils

25
Q

what part of collagen synthesis occurs in rER

A

a- chain synthesis

proline + lysine hydroxylation > hydroxyproline + hydroxylysine

26
Q

what part of collagen synthesis occurs in golgi?

A

a-chain glycosylation > procollagen

27
Q

longest known protein

A

tropocollagen

28
Q

where is tropocollagen found?

A

all collagen and reticular fibers except thymus

29
Q

T/F? Hydroxyproline and hydroxylysine are found in most proteins

A

false; making them a good estimate of collagen content

30
Q

desmosine

A

cross links fibers of tropoelastin

31
Q

4 lipid types

A

eicosanoids
triglycerides
phospholipids
steroids

32
Q

betaine

A

used by kidney to control water balance

33
Q

betaine precursor

A

choline

NBDE Biochem (1 decks)

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