Entrance Test For Biotechnology Page 13
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2376. In
t he
b enzyloxycarbonyl
m ethod
f or
t he
s ynthesis
o f
p eptides,
o ne
o f
t he
following
i s
n ot
f ormed:
a) Toluene
b) Carbon
d ioxide
c) Carbon
m onoxide
d) Unreacted
a mino
a cid.
77. One
o f
t he
f ollowing
r eagents
i s
n ot
u seful
t o
b ind
t he
f ree
s ulfhydryl
g roups
i n
proteins:
a) Ellman
r eagent
b) Parachloromercury
b enzoate
c) Iodo
a cetamide
d) Ethylchloroformate.
7 8.
In
w hich
t ype
o f
n ewly
r eplicated
D NA,
D NA
s equences
a re
i nvisible
t o
a
r estriction
e nzyme.
a) mutated
b) single-‐stranded
c) modified
d) hemimethylated
7 9.
Infections
t hat
a re
a cquired
d uring
a
s tay
i n
a
h ospital
a re
c alled:
a) clinical
b) nosocomial
c) gnotobiotic
d) resistant
8 0.
A
b ond
w ith
m aximum
c ovalent
c haracter
b etween
n on-‐metallic
e lements
i s
f ound
b etween-‐
a) Atoms
o f
s ame
s ize
b) Chemically
s imilar
a toms
c) Identical
a toms
d) Atoms
o f
w idely
d iffering
e lectronegativities
8 1.
A
h emolysis
r eaction
( on
a
b lood
a gar
p late)
w ith
a n
u nidentified
c olony
t hat
r esults
i n
a
g reen
z one
d ue
t o
o xidized
i ron
i n
n onlysed
r ed
b lood
c ells
w ould
b e
c alled:
a) beta-‐hemolytic
b) nonhemolytic
c) gamma-‐hemolytic
d) alpha-‐hemolytic
8 2.
What
i s
t he
b est
d escription
o f
b lood?
a) Sol
b) Foam
c) Solution
d) Aerosol
13
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