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Irene Gold Questions > Biochemistry 3 > Flashcards

Biochemistry 3 Flashcards

1
Q 
what is the role of KM?
measures substrate concentration 
measures energy of activation 
measures velocity of a reaction 
measures enzyme/substrate affinity
A

measures enzyme/substrate affinity

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2
Q 
what do competitive inhibitors do to KM?
alters vmax which indirectly alters KM
lowers it 
raises it
no effect
A

raises it

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3
Q 
a lack \_\_ enzyme means you will be unable to convert phenylalanine to \_\_\_.
tyrosine hydroxylase/tyrosine
phenylalanine hydroxylase/ tryptophan
phenylalanine hydroxylase/ tyrosine
tryptophan hydroxylase/ tryptophan
A

phenylalanine hydroxylase/ tyrosine

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4
Q 
a diet rich in cereal and grain will lead to a deficiency of which of the following vitamins except?
pyridoxine
folic acid 
cobalamine
thiamin
A

thiamin

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5
Q

what is the role of a kinase enzyme?

  • transfer of inorganic phosphate groups
  • transfer of hydroxyl groups
  • creation of polar bonds
  • DNA/RNA replication
A

transfer of inorganic phosphate groups

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6
Q 
which of the following is favorable in Gibbs free energy?
-0.5
0.5
0
3.2
A

0.5

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7
Q 
which of the following vitamins is Biotin?
B5
B12
B9
B7
A

B7

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8
Q 
which of the following is the structural component of CoA
B5
B12
B9
B6
A

B5

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9
Q 
what is a typical product of dehydrogenase enzyme
ATP
GTP
CO2
NADH
A

NADH

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10
Q 
what does tyrosine convert to in the body?
melatonin 
dopamine
phenylalanine
niacin
A

dopamine

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11
Q 
a deficiency of vitamin c will result in all of the following except \_\_\_.
delayed wound healing 
bleeding gums
poor iron absorption 
clotting deficiency
A

clotting deficiency

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12
Q 
which of the following causes xerophthalmia?
SLE
scleroderma
sjorgens
RA
A

sjorgens

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13
Q 
a diet high in fat needs a sufficient amount of \_\_\_ vitamin to aid in digestion.
A
D
E
K
A

E

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14
Q 
which of the following vitamins helps in the formation of collagen?
A
E
D3
C
A

C

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15
Q 
hyaluronic acid has an association with which of the following?
sphengolipids 
proteoglycans
nucleosides
sterols
A

sphengolipids

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16
Q 
vitamin D3 is activated in which of the following?
kidneys
liver
skin 
pancreas
A

kidneys

17
Q 
the designation Fe3 is which form of iron?
transferin bound
transported 
active
inactive
A

active

18
Q 
what is the most common role of triglycerols?
neurotransmitter synthesis
membrane synthesis 
hormone synthesis 
protein synthesis
A

membrane synthesis

19
Q 
which of the following is an example of a pentagon 
dehydroxyacetone
amylose 
ribose
glucose
A

ribose

20
Q 
what is the linkage of cellobiose?
A 1,4
A 1,6
B 1,6
B 1,4
A

B 1,4

Irene Gold Questions (19 decks)

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