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BIOCHEMISTRY - 1st Year 1st Sem Comprehensive Exam > OWEL EVALS PRELIMS (2022) > Flashcards

OWEL EVALS PRELIMS (2022) Flashcards

1
Q

What is true about pH?

A

Negative log of Hydrogen

ion concentration

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2
Q

What is true about bases?

A

dissociates completely even

at high PH

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3
Q

Possible isomers of glycoside with 5

chiral carbon?

A

32

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4
Q

Etiology of metabolic acidosis

A

Diarrhea

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5
Q

Water is an

A

excellent nucleophile

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6
Q

What is true about

glycosaminoglycan?

A

Attached to protein
molecule from
proteoglycan

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7
Q

Angle of water

A

105 degrees

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8
Q

What is the primary compensation of

respiratory acidosis?

A

metabolic alkalosis
(increase pH, increase
HCO3)

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9
Q

What is the primary compensation of

metabolic acidosis?

A

respiratory alkalosis

decrease CO2

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10
Q

Which has molybdenum and
plays important role in converting
purine to uric acid?

A

Xanthine oxidase

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11
Q

What is the dielectric constant

of water?

A

78.5

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12
Q

What is the prosthetic group of

glutathione peroxidase?

A

Selenium

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13
Q

wo glucose molecules (alpha

1,1)

A

Trehalose

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14
Q

Coulomb’s Law

A

soul searching nalng sa book daw

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15
Q

Entire complement of sugar of

an organism

A

Glycome

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16
Q

Same molecular formula as

glucose with keto group position 2?

A

Fructose

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17
Q

Which of the ff has low GI

A

Vegetable

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18
Q

Which is true about glycolysis?

A

Irreversible step

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19
Q

Which is the greatest
quantitative source in aerobic
organisms?

A

Oxidative phosphorylation

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20
Q

Which helps/works with

invertebrate muscle

A

Arginine phosphate

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21
Q

Which of the ff is true about

acids?

A

Proton donors

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22
Q

What do you call glucose

epimer at carbon 2?

A

D-mannose

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23
Q

Glucose epimer at Carbon 4?

A

D-galactose

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24
Q

Uses hydrogen as an electron

donor and acceptor

A

Catalase

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25
Q

Catalyze the removal of H ion
from substrate using oxygen as
hydrogen acceptor?

A

Oxidases

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26
Q

Under most conditions in Vivo,

the activity seems to be favored?

A

Catalase

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27
Q

Proteins that bind specific

glycosyl residues

A

Lectins

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28
Q

Which is true about entropy?

A

Max as equilibrium is

approached

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29
Q 
Superoxidase dismutase
removes/protects
organisms against
superoxide.
 T or F?
A

Throw

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30
Q

First law of thermodynamics

A

Energy of a system can only
be
transferred/transformed

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31
Q

Intermediate is acetyl coa

A

Leucine

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32
Q

Ketogenic a.a

A

Leucine

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33
Q

Driving force for proton

A

enters ATP synthase to

produce atp

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34
Q

Fi has ___beta and ___ alpha

A

3 beta and 3 alpha

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35
Q

Vit for succinate

dehydrogenase:

A

Niacin

36
Q

Non essential a.a produced by

body by

A

transamination

37
Q

Essential a.a can be acq thru

A

Diet

38
Q

If there is dec in insulin,
lipgenesis and gluconeogenesis will
inc

A

False

39
Q

Uncouplers are:

A

brown adipose tissue that
functions to generate body
heat

40
Q

Physical metabolic act increases

metaboloc rate by

A

40-50%

41
Q

Breakdown of tag to fatty acid

A

Lipoprotein lipase

42
Q

True of chylomicrons

A

cannot be taken up by liver

43
Q

When fatty acid is hydrolyzed it
is directly taken up by the brain or
erythrocytes

A

False

44
Q

What enzyme catalyzes
anaplerotic reaction from pyruvate to
oxaloacetate

A

Pyruvate carboxylase

45
Q

how many atps will be
produced of the reducing eq in 1cycle
of atp up to respiratory chain

A

9 ATP

46
Q

intermediates of Acetyl COA

and gluconeogenesis are the ff except:

A

Threonine

47
Q

Total number of atp produced

in the matrix

A

25 ATP

48
Q

inhibits oxidative
phosphorylation by inhibiting thetransporter of ADP into and ATP out
of the mitochondrion

A

Atractyloside

49
Q

Direct reduction of
Ubiquinone(Q) by succinate
dehydrogenase

A

complex 2

50
Q

Substrate that combines with
Acetyl CoA for citric acid cycle to
proceed

A

Oxaloacetate

51
Q

Co factors of alpha

ketoglutarate

A

aota (COA, NAD thiamine

diphosphate etc)

52
Q

Oxidation of one QH2

A

coupled to the reduction of
two molecules of
cytochrome c

53
Q

activates glycogen

phosphorylase

A

Glucagon

54
Q

Availability of ADP ONLY

State 4

A

Resting state

55
Q

Flavin nucleotides

A

Complex 1&2

56
Q

Malate dehydrogenase

requirement

A

Niacin

57
Q

What does not occur in

erythrocytes

A

B-oxidation of FA

58
Q

Creatine phosphate shuttle

A

transport of high energy

phosphate

59
Q

Inhibited by
Malonate/Malonate will accumulate
this enzyme

A

Succinate dehydrogenase

60
Q

cannot be synthesized by
body thus must be supplied
in the diet

A

Essential amino acids

61
Q

can be synthesized by the

body

A

Non-essential amino acids

62
Q

Total ATP in the mitochondrial

matrix

A

25

63
Q

Amino acid that will produce

acetyl CoA only/purely ketogenic

A

Lysine/Leucine

64
Q

Oxidation of reducing equivalents will give a total ATP in

citric acid cycle of

A

Resting state
Availability of ADP only
(State 4)

65
Q

Physical activity increases basal

metabolic rate by

A

40-50%

66
Q

Erythrocytes are purely

dependent on

A

PPP

67
Q

Uses Acetyl COA as substrate

A

Citrate synthase

68
Q

Protein metabolism in fasting

state

A

0.2/20%

69
Q

Vitamin needed for electron

acceptor of malate dehydrogenase

A

Niacin

70
Q

True of uncouplers

A

Found in brown adipose

tissue

71
Q

Which doesn’t occur in RBCs

A

betaoxidation

72
Q

True of glucagon

A

vactivates glycogen

phosphorylase in the liver

73
Q

True of succinate

dehydrogenase

A

contains FAD and Fe-S

74
Q

Lack of insulin leads to
gluconeogenesis
true or false

A

Throw

75
Q

True of creatinine phosphate

shuttle

A

transfer of high energy
phosphate from
mitochondria

76
Q

Proton motive force:

A

drives ATP synthesis

77
Q

True of Acetyl-Coa from betaoxidation

A

can be used to synthesize

acetone and acetoacetate

78
Q

True of chylomicrons

A

not directly taken up by the

liver

79
Q

Key enzyme that catalyzes net
transfer out of TCA into
gluconeogenesis

A

phosphoenolpyruvate

carboxykinase

80
Q

Enzyme that directly reduces

ubiquinone

A

succinate dehydrogenase

81
Q

True of Fe-S proteins

A

found in complexes I, II and

III

82
Q

NAD as electron acceptor

A

Malate dehydrogenase

83
Q

T or F: Fatty acids from lipolysis
are directly taken up by the brain and
rbc

A

falls

84
Q

Sites of regulation for TCA

A

citrate synthase and

pyruvate dehydrogenase

85
Q

Mechanism of ATP synthase

A

F1 has 3 alpha and 3 beta

subunits that do not rotate

BIOCHEMISTRY - 1st Year 1st Sem Comprehensive Exam (16 decks)

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