Entrance Test For Biotechnology Page 14
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2383.
W hich
o ne
o f
t he
f ollowing
d ispersions
d oes
n ot
h ave
l iquid
c ontinuous
p hase?
a) Nanosuspension
b) Microemulsion
c) Gel
d) Foam
84.
W hich
o f
t he
f ollowing
s equences
c orrectly
d escribes
t he
c hange
i n
d omain
s tructure
a s
m ore
o il
i s
a dded
t o
a
w ater-‐in-‐oil
e mulsion?
a) Bicontinuous,
s pherical,
c ylinder-‐like
b) Spherical,
c ylinder-‐like,
b icontinuous
c) Spherical,
b icontinuous,
c ylinder-‐like
d) Cylinder-‐like,
s pherical,
b icontinuous
85.
T he
s cattering
o f
l ight
b y
c oarse
a nd
c olloidal
d ispersed
s ystems
i s
k nown
a s?
a) Contrast
m atching
b) DLVO
t heory
c) Tyndall
e ffect
d) Creaming
86.
W hich
o f
t he
f ollowing
i s
n ot
a
m echanism
f or
t he
s eparation
o f
a
p hysically
u nstable
s uspension
o f
m agnesium
h ydroxide
i n
w ater?
a) Flocculation
b) Aggregation
c) Ostwald
r ipening
d) Hydrolysis
87.
W hat
m ust
b e
d one
t o
a
s pecimen
t o
i ncrease
t he
c ontrast
o f
t he
s tructures
b eing
v iewed?
a) Illuminated
b) Stained
c) Placed
u nder
a cover
s lip
d) Thinly
s liced
88.
T he
f ield
o f
v iew
o f
a
m icroscope
w ith
a
1 0X
o cular
a nd
a
4 X
o bjective
i s
5 mm.
W hat
i s
w ill
b e
t he
f ield
o f
v iew
w ith
a
1 0X
o bjective?
a) 3.14
m m
2
b) 20mm
c) 2mm
d) 2mm
2
89.
F or
w hich
o f
t he
f ollowing
s pecimens
w ould
y ou
u se
a
d issecting
m icroscope?
a) Human
s kin
c ells
b) E.coli
c) Insect
m outh
p arts
d) Virus
90.
W hich
o ne
o f
t he
f ollowing
i s
a
c haracteristic
o f
g amma
r adiation
p article?
a) Positively
c harged
b) Negatively
c harged
c) Has
n o
c harge
a nd
n o
m ass
d) Has
l ow
p enetrating
c apability
14
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