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MEDIUM
ENGLISH
Biology
Proteins comprise of ___________% of the total dry weight of a cell?
A
40%
Option A
B
50%
Option B
C
60%
Option C
D
70%
Option D
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MEDIUM
ENGLISH
Biology
Adult birds normally possess only one functional____________?
A
Ureter
Option A
B
Ovary
Option B
C
Lung
Option C
D
Testis
Option D
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MEDIUM
ENGLISH
Biology
“lubb” sound is produced due to___________________?
A
Opening of inlet valve
Option A
B
Closure of inlet valve
Option B
C
Opening of outlet valve
Option C
D
Closure of outlet valve
Option D
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MEDIUM
ENGLISH
Biology
In condition of high temperature, following does not occur or occurs at low level__________?
A
Vasodilation
Option A
B
Activation of sweat glands
Option B
C
Thermogenesis
Option C
D
Evaporative cooling
Option D
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MEDIUM
ENGLISH
Biology
Who first observed and thus hypothesized that new cells are formed from previously existing living cell?
A
Theodor Schwann and Schleiden
Option A
B
Rudolph Virchows
Option B
C
Louis Pasteur
Option C
D
Both b and c
Option D
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MEDIUM
ENGLISH
Biology
In Hardy-Weinberg formula P2 represents frequency of_____________?
A
Recessive allele
Option A
B
Dominant allele
Option B
C
Homozygous dominant individual
Option C
D
Homozygous recessive individual
Option D
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MEDIUM
ENGLISH
Biology
_____________ supported theory of special creation?
A
Linnaeus
Option A
B
Aristotle
Option B
C
Mendel
Option C
D
Lamarck
Option D
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MEDIUM
ENGLISH
Biology
Percentage of proteins in cell membrane is____________?
A
20-40%
Option A
B
40-50%
Option B
C
60-80%
Option C
D
80-100%
Option D
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MEDIUM
ENGLISH
Biology
Which of the following is most constant abiotic component of ecosystem___________?
A
Air
Option A
B
Water
Option B
C
Land
Option C
D
Gravity
Option D
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MEDIUM
ENGLISH
Biology
Ecosystem not found in Pakistan is_____________?
A
Tropical rain forest
Option A
B
Temperate deciduous forest
Option B
C
Grassland
Option C
D
Tundra
Option D
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MEDIUM
ENGLISH
Biology
Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________?
A
Active transport
Option A
B
Passive transport
Option B
C
Co-transport
Option C
D
Counter transport
Option D
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MEDIUM
ENGLISH
Biology
The productivity of aquatic ecosystem is basically determined by light and____________?
A
CO2
Option A
B
O2
Option B
C
Water
Option C
D
Nutrients
Option D
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MEDIUM
ENGLISH
Biology
The first layer of cell wall which is formed is___________?
A
Primary wall
Option A
B
Secondary wall
Option B
C
Middle lamella
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Biology
Annual rainfall in grassland is about_____________?
A
More than 2500 mm
Option A
B
750-1500 mm
Option B
C
250-750 mm
Option C
D
Less than 250 mm
Option D
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MEDIUM
ENGLISH
Biology
Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due_____________?
A
Rhizobium
Option A
B
Nitrosomonas
Option B
C
Nitrobacter
Option C
D
Pseudomonas
Option D
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MEDIUM
ENGLISH
Biology
Cellulose is the major component of__________?
A
Primary wall
Option A
B
Secondary wall
Option B
C
Middle lamella
Option C
D
all of the above
Option D
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MEDIUM
ENGLISH
Biology
Humming bird is an example of________________?
A
Cold blooded animal
Option A
B
Ectotherm
Option B
C
Endotherm
Option C
D
Heterotherm
Option D
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MEDIUM
ENGLISH
Biology
Number of cervical vertebrae is_____________?
A
5
Option A
B
7
Option B
C
9
Option C
D
12
Option D
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MEDIUM
ENGLISH
Biology
Autophagosomes are____________?
A
Those lysosomes which eat parts of their own cells to generate energy.
Option A
B
Those lysosomes which eat old and worn out cellular organelles.
Option B
C
Lysosomes which help in extracellular digestion
Option C
D
Both a and b
Option D
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MEDIUM
ENGLISH
Biology
Sapwood is formed from_____________?
A
Primary xylem
Option A
B
Secondary xylem
Option B
C
Primary phloem
Option C
D
Secondary phloem
Option D
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