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  #21  
Old Thursday, March 01, 2012
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11. what is the correct sequence of inner planets of our solar system
a.jupiter, saturn, uranus, neptune
b. wrong sequence
c.mercury, venus, earth, mars
d.none of the above

13. sun is a
a. Blue giant
b. white dwarf
c.supernova
d. none of the above

14. galileo was persecuted for saying
sigh...a hodgepodge of sun stationary, earth revolves, center of universe etc

15. Newton and some other dude are considered father of
a.calculus
b.general relativity
c.

(hehe,,i bet you can tell i got loads of mcqs wrong..at least 15 )

16. the energy and matter in a closed system
a. conserved
b.changed from one form to another
c. both a and b
d.none of the above

17. father transfers y chromosome to
a. son b. daughter. c. pata nai aur kia ho sakta hai

18. an ovum is
a. diploid b. haploid d none of the above

19. prokaryotic cell contains
a. nucleaus b.ribosomes c.some other organelle

20.which one of these is infectious
a. baldness
b. deafness
c. blindness
d.none of the above
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  #22  
Old Thursday, March 01, 2012
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[QUOTE=Wali Ahad;408863]11. what is the correct sequence of inner planets of our solar system
a.jupiter, saturn, uranus, neptune
b. wrong sequence
c.mercury, venus, earth, mars
d.none of the above
Answer:C Mercury, Venus, Earth and Mars
13. sun is a
a. Blue giant
b. white dwarf
c.supernova
d. none of the above

14. galileo was persecuted for saying
sigh...a hodgepodge of sun stationary, earth revolves, center of universe etc
For saying: "Sun is the center of the universe"

15. Newton and some other dude are considered father of
a.calculus
b.general relativity
c.
Answer: Classical mechanics, I guess.

(hehe,,i bet you can tell i got loads of mcqs wrong..at least 15 )

16. the energy and matter in a closed system
a. conserved
b.changed from one form to another
c. both a and b
d.none of the above
Both, A and B.
17. father transfers y chromosome to
a. son b. daughter. c. pata nai aur kia ho sakta hai

Answer: A..Son, son main XY hota hai, daughter k liay X transfer krta hai..female= XX.
18. an ovum is
a. diploid b. haploid d none of the above
Answer: A
19. prokaryotic cell contains
a. nucleaus b.ribosomes c.some other organelle
Membrane bound nucleus nahin hota..
20.which one of these is infectious
a. baldness
b. deafness
c. blindness
d.none of the above
Answer: D, I guess.
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  #23  
Old Thursday, March 01, 2012
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hehe..thanks candidguy..now no one would spare me a second look, and you would become an overnight sensation

jk..
good job

though i think ovum is haploid, no?
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  #24  
Old Thursday, March 01, 2012
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Yes. You're right. Ovum is a haploid. Sorry!
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  #25  
Old Thursday, March 01, 2012
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Chlorophyll is the molecule that traps this 'most elusive of all powers' - and is called a photoreceptor. It is found in the chloroplasts of green plants, and is what makes green plants, green. The basic structure of a chlorophyll molecule is a porphyrin ring, co-ordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, except that in heme the central atom is iron, whereas in chlorophyll it is magnesium.

There are actually 2 main types of chlorophyll, named a and b. They differ only slightly, in the composition of a sidechain (in a it is -CH3, in b it is CHO). Both of these two chlorophylls are very effective photoreceptors because they contain a network of alternating single and double bonds, and the orbitals can delocalise stabilising the structure. Such delocalised polyenes have very strong absorption bands in the visible regions of the spectrum, allowing the plant to absorb the energy from sunlight.

The different sidegroups in the 2 chlorophylls 'tune' the absorption spectrum to slightly different wavelengths, so that light that is not significantly absorbed by chlorophyll a, at, say, 460nm, will instead be captured by chlorophyll b, which absorbs strongly at that wavelength. Thus these two kinds of chlorophyll complement each other in absorbing sunlight. Plants can obtain all their energy requirements from the blue and red parts of the spectrum, however, there is still a large spectral region, between 500-600nm, where very little light is absorbed. This light is in the green region of the spectrum, and since it is reflected, this is the reason plants appear green. Chlorophyll absorbs so strongly that it can mask other less intense colours. Some of these more delicate colours (from molecules such as carotene and quercetin) are revealed when the chlorophyll molecule decays in the Autumn, and the woodlands turn red, orange, and golden brown. Chlorophyll can also be damaged when vegetation is cooked, since the central Mg atom is replaced by hydrogen ions. This affects the energy levels within the molecule, causing its absorbance spectrum to alter. Thus cooked leaves change colour - often becoming a paler, insipid yellowy green.
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  #26  
Old Wednesday, March 14, 2012
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especially for sadia who needs a book by a foreign publisher.
everyday science by pearson.
recommended by mr. mirza niamat baig, a friend of mine.
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  #27  
Old Saturday, March 31, 2012
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Every day science css-2012 objective
EVERY DAY SCIENCE CSS-2012 OBJECTIVE
MARKS 50 TIME 80 MINS
1) A SCIENTIFIC METHOD WILL SEEK TO EXPLAIN NATURAL EVENTS AND MAKE USEFUL PREDICTION IN
A) A HAPHAZARD MANNER
B) A MANNER DESIGN TO FIT THE THEORIST,S OR EXPERIMENTER,S BIAS
C) A CONSISTENTLY REPRODUCIBLE MANNER
D) NONE OF THESE
2) “TRUTH IS THE SOUGHT FOR ITS OWN SAKE. AND THOSE WHO ARE ENGAGED UPON THE QUEST FOR ANYTHING FOR ITS OWN SAKE ARE NOTINTERESTED IN OTHER THINGS. FINDING THE TRUTH IS DIFFICULT AND THE ROAD TO IT IS ROUGH.” THIS WAS STATED BY WHICH KEY FIGURE IN THE DEVELOPMENT OF SCIENTIFIC METHOD IN THE 11TH CENTURY?
A) ARISTOTLE
B) IBN AL HAYTHAM
C) PLATO `
D) NONE OF THESE
3) ABU ABDULLAH MUHAMMAD BIN MUSA AL-KHWARIZMI IS FAMOUS FOR WRITING THE “KITAB AL JABER WAL MUQABLA” IN WHICH HE
A) PRESENTED THE FIRST SYSTEMATIC SOLUTION OF LINEAR AND QUADRATIC EQUATIONS
B) DELINEATED METHODS OF OPPRESSION & COMPETITION
C) C) WROTE THE LAWS OF OPTICS
D) NONE OF THESE
4) GALLIEO GALLIES WAS PERESCUTED BY THE CATHOLIC CHURCH FOR SUSPICON OF HOLDING THE VIEW THAT:
A) OBJECTS OF DIFFERENT MASSES FELL AT THE SAME VELOCITY
B) THE SUN REVOLVES AROUNDS THE MOON
C) THE EARTH WAS PROBABLY NOT THE CENTRE OF THE UNIVERSE
D) NONE OF THESE
5) THE PROLIFERATION OF EDUCATION AND DISSEMINATION OF KNOWLEDGE IN THE LAST TWO CENTURIES HAS LED TO A FAITH IN SCIENCE THAT:
A) CAUSES HUMAN BEINGS TO TURN ON OTHER HUMAN BEINGS
B) IS THE MAIN CAUSE OF POVERTY AND WAR
C) LEADS TO OPPRESSION OF EDUCATION
D) NONE OF THESE
6) SCIENCE ATTEMPTS TO:
A) EXPLAINS HOW THE UNIVERSE WORKS BY DICOVERING THE LAWS REGULATING EVERYTHING AROUND US
B) USE DICOVERED LAWS TO ENGINEER NEW DEVICES
C) BOTH A & B
D) NONE OF THESE
7) IBN ZUHR, THE AUTHOR OF AL TAISIR, IS KNOWN AS:
A) THE FATHER OF EXPERIMENTAL SURGERY
B) THE FOUNDER OF CALCULUS
C) A BIOGRAPHER OF PROVINCIAL GOVERNORS
D) NONE OF THESE
8) IBN KHALDUN’S MUQQADIMAH IS REGARDED BY MANY AS:
A) THE FIRST WORK DEALING WITH A PHILOSOPHY OF HISTORY
B) A MINOR FOOTNOTE IN HIS WRITINGS
C) A WELL DOCUMENTED TALE OF HIS TRIAL
D) NONE OF THESE
9) A PHYSICAL, MATHEMATICAL OR LOGICAL REPRESENTATION OF A NATURAL PHENOMENON IS CALLED
A) PHENOMENAL
B) A SCIENTIFIC MODEL
C) A THEORATICAL POSTULATE
D) NONE OF THESE
10) ISSAC NEWTON AND GOTTFRIED LEIBNIZ WORKING INDEPENDENTLY IN THE 17TH CENURY LAID THE FOUNDATION OF CLASSICAL PHYSICS AND ARE KNOWN AS FATHERS OF
A) ASTROLOGY
B) RELATIVISTIC THEORY
C) INTEGRAL & DIFFERENTIAL CALCULUS
D) NONE OF THESE
11) A LIGHT YEAR IS
A) A YEAR DEVOID OF HEAVY RAINFALL
B) THE TIME TAKEN BY LIGHT TO BE GENERATED & PROPAGATED FROM THE CENTRE OF THE SUN TO OUR EARTH
C) THE DISTANCE COVERED BY LIGHT IN ONE OF OUR SOLAR YEARS
D) NONE OF THESE
12) OUR SUN IS CLASSIFIED AS
A) A BLUE GIANT
B) A YELLOW DWARF
C) SUPERNOVA
D) NONE OF THESE
13) THE SUN PRODUCES MOST OF ITS ENERGY BY:
A) NUCLEAR FUSION WHICH INVOLVES CONVERTING “H” TO “He”
B) NUCLEAR FISSION INVOLVING THE BURNING OF URANIUM & PLUTONIUM
C) NUCLEAR FISSION INVOLVING THE COMBINING OF URANIUM AND PALLADIUM
D) NONE OF THESE
14) WHICH OF THE FOLLOWING IS THE CORRECT ORDERING OF THE INNER PLANETS ACCORDING TO THEIR ROXIMITY TO THE SUN
A) JUPITER,SATURN,URANUS,NEPTUNE
B) PHOBOS,DEIMES,EUROPE,TIAS
C) MERCURY,VENUS,EARTH,MARS
D) NONE OF THESE
15) HOW LONG DOES OUR EARTH TAKES TO TURN ABOUT ITS AXIS
A) ONE HOUR
B) 23 HOURS
C) 24 HOURS
D) NONE OF THESE
16) TIDES ARE GENERATED BY
A) THE MOVEMENTS OF SHIPS IN THE OCEANS

B) THE GRAVITATIONAL EFFECT OF MOON ANA SUN ON OUR EARTH
C) THE MOVEMENTS OF THE EARTH AROUND THE SUN
D) NONE OF THESE
17) SEASONS ARE GENERATED BY
A) THE MOVEMENT OF SUN AROUND COABES OF THE MILKY WAY
B) THE MOVEMENT OF THE EARTH AROUND THE SUN
C) RELATIVISTIC QUANTIUM -------------------------
D) NONE OF THESE
18) ALTHOUGH THE MASS OF A MAN ON MOON REMAINS SAME AS ON THE EARTH,HE WILL
A) BE MUCH HAPPIER THERE
B) WEIGH ONE SIXTH AS MUCH
C) WEIGH TWICE AS MUCH
D) NONE OF THESE
19) IF WE ARE AT SEE LEVEL OUR ATMOSPHERE PRESSES DOWN ON US WITH A PRESSURE OF:
A) 1 FPS
B) 14.3 FPS
C) 35.8 FPS
D) NONE OF THESE
20) THE EFFICIENCY OF A MACHINE IS
A) ALWAYS GREATER TANH 100%
B) ALWAYS LESS THAN 100%
C) ALWAYS 100%
D) NONE OF THESE
21) A MATERIAL WITH HIGH ELASTICITY
A) DOES NOT RETURNS TO ITS ORIGIONAL SHAPE UPON BEING STRETCHED AND THEN RELEASED
B) RETURNS AS CLOSE AS POSSIBLE TO ITS ORIGIONAL SHAPE UPON BEING STRETCHED AND THEN RELEASED
C) CAN BE STRETCHEDTO INFINITE DISTANCES
D) NONE OF THESE
22) MATTER AND ENERGY
A) CAN BE CONVERTED FROM ONE TO THE OTHER
B) WHEN TAKEN TOGETHER , CONVERTED IN ALL PROCESSESS IN A CLOSED SYSTEM
C) BOTH A & B
D) NONE OF THESE
23) ELECTRIC CURRENT
A) FLOWS FROM A HIGHER POTENTIAL TO LOWER POTENTIAL
B) IS CAUSED BY FLOW OF ELECTRONS
C) BOTH A & B
D) NONE OF THESE
24) ELECTRICITY AND MAGNETISM ARE
A) TWO FACETS OF SAME FORCE
B) ALWAYS OPPOSED TO EACH OTHER
C) BOTH A & B
D) NONE OF THESE
25) BALL BEARING HELP WHEELS AND OTHER ROTATING OBJECTS
A) MOVE WITHOUT CONSUMING ANY ENERGY
B) ROTATE MORE EASILY AND WITH LESS FRICTION
C) BOTH A & B
D) NONE OF THESE
26) PHOTOGRAPHY WORKS BY
A) CAPTURING THE SOULS OF THE OBJECTS BEING PHOTOGRAPHED
B) CAPTURING LIGHT REFLECTED FROM THE OBJECT BEING PHOTOGRAPHED
C) BOTH A & B
D) NONE OF THESE
27) ARTHUR C.CLARKE, THE FAMOUS SCIENCE FICTION AUTHOR, WHILE WORKING AS A RADIO OPERATOR IN THE BRITISH ARMY IN WORLD WAR-II
A) PROPOSED BULIDING A SPACE ELEVATOR FROM CARBON MONO-FILAMENTS
B) POSTULATED THE EXISTENCE OF EXTRA-TERRESTRIAL ARTIFACTS ON THE MOON
C) PROPOSED THAT A NETWORK OF SATELLITES IN STATIONARY ORBIT AT VERY HIGH ALTITUDES AROUNDS THE EARTH BE USED TO BOUNCE COMMUNICATION SIGNALS ALL OVER THE WORLD
D) NONE OF THESE
28) THE SINO PAKISTANI JF-17 THUNDER AIRCRAFT:
A) IS A COMMERCIAL TRANSPORT AIRCRAFT
B) IS NEITHER BUILT NOR ASSEMBLED IN PAKISTAN
C) HAS NO STEATH FEATURES IN ITS ENGINE INLETS OR ELSEWHERE
D) NONE OF THESE
29) COMMUNICATION SATELLITES ARE IN
A) GEOSTATIONARY ORBIT
B) GEOSYNCHRONOUS ORBIT
C) SEMISYNCHRONOUS ORBIT
D) NONE OF THESE
30) RAM OF A COMPUTER IS REFERS TO :
A) READ ACCESS MEMORY
B) RIGHT ACCESS MEMORY
C) RANDOM ACCESS MEMORY
D) NONE OF THESE
31) WHICH OF THE FOLLOWING IS RESPONSIBLE FOR TRANSPORTING OXYGEN IN THE BLOOD
A) WHITE BLOOD CELLS-------WBC
B) NEUTROPHILLS
C) RED BLOOD CELLS---------RBC
D) NONE OF THESE
32) WHICH OF THE FOLLOWING IS TRUE FOR HORMONES?
A) ALL PROTEINS ARE HORMONES
B) ALL HORMONES ARE PROTEINS
C) ALL HORMONES ARE AMINO ACIDS
D) NONE OF THESE
33) PROKARYOTES HAVE WHICH OF THE FOLLOWING STRUCTURES?
A) NUCLEUS
B) MITOCHUNDRIA
C) CHLOROPLAST
D) NONE OF THESE
34) DIVERSITY IN WHICH OF THE FOLLOWING GROUPS IS NOT DUE TO ARTIFICIAL SLECTION?
A) WHEAT
B) DOGS
C) --------------------------
D) NONE OF THESE
35) ARACHNOPHOBIA IS REFER TO A FEAR OF
A) SPIDERS
B) SNAKES
C) BATS
D) NONE OF THESE
36) WHICH OF THE FOLLOWING IS A PART OF DNA?
A) dGTP
B) dADP
C) dTMP
D) NONE OF THESE
37) IN HUMANS THE “Y” CHROMOSOME IS PASSED TO THE NEXT GENERATION FROM
A) FATHER TO SON
B) MOTHER TO SON
C) FATHER TO DAUGHTER
D) NONE OF THESE
38) WHICH OF THE FOLLOWING IS A MAMMAL?
A) BLUE TUNA
B) SWORD FISH
C) WHALE
D) NONE OF THESE
39) FEMALE OVA ARE:
A) HAPLOID
B) DIPLOID
C) TRIPLOID
D) NONE OF THESE
40) WHICH OF THE FOLLOWING IS NOT A PART OF DNA?
A) THYMINE
B) ADENINE
C) RIBOSE
D) NONE OF THESE
41) WHICH OF THE FOLLOWING IS A LABELED AS “GOOD CHOLESTEROL” FOR HUMANS?
A) HIGH-DENSITY LIPOPROTEIN--------------HDL
B) LOW DENSITY LIPOPROTEIN--------------- LDL
C) VERY LOW DENSITY LIPOPROTEIN ------VLDL
D) NONE OF THESE
42) WHICH OF THE FOLLOWING IS A INFECTIOUS DISEASE
A) DEAFNESS
B) BLINDNESS
C) BALDNESS
D) NONE OF THESE
43) WHICH OF THE FOLLOWING IS A NON ESSENTIAL AMINO ACID?
A) ALMINE
B) METHENAMINE
C) TYROSINE
D) NONE OF THESE
44) STARTING FROM HIGHER CHOOSE THE CORRECT SEQUENCE OF MOLECULES IN ORDER OF ENERGY YEILDING
A) SUGAR,FATS,PROTEIN
B) PROTEIN,SUGAR,FATS
C) FATS,SUGAR,PROTEIN
D) NONE OF THESE
45) WHICH OF THE FOLLOWING IS NOT A PART OF PROTEIN?
A) GLUTAMIC ACID
B) SULPHURIC ACID
C) ASPARTIC ACID
D) NONE OF THESE
46) THE HIGHEST SOURCE OF OMEGA-3 FATTY ACID IS
A) FISH OIL
B) CORN OIL
C) SUNFLOWER OIL
D) NONE OF THESE
47) WHICH OF THE FOLLOWING GAS IS ESSENTIAL FOR HUMAN
A) CARBON DIOXIDE
B) NITROGEN
C) OXYGEN
D) NONE OF THESE
48) PROTEINS ARE MADE UP OF
A) POLYNUCLEOTIDE
B) POLYPEPTIDE
C) POLYACETYLENE
D) NONE OF THESE
49) -------------------------------------------------------DONOT REMEMBER
50) ------------------------------------------------------- DONOT REMEMBER
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  #28  
Old Sunday, April 01, 2012
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[QUOTE=Raja Bahar;418103]Every day science css-2012 objective
EVERY DAY SCIENCE CSS-2012 OBJECTIVE
MARKS 50 TIME 80 MINS
1) A SCIENTIFIC METHOD WILL SEEK TO EXPLAIN NATURAL EVENTS AND MAKE USEFUL PREDICTION IN
A) A HAPHAZARD MANNER
B) A MANNER DESIGN TO FIT THE THEORIST,S OR EXPERIMENTER,S BIAS
C) A CONSISTENTLY REPRODUCIBLE MANNER
D) NONE OF THESE

4) GALLIEO GALLIES WAS PERESCUTED BY THE CATHOLIC CHURCH FOR SUSPICON OF HOLDING THE VIEW THAT:
A) OBJECTS OF DIFFERENT MASSES FELL AT THE SAME VELOCITY
B) THE SUN REVOLVES AROUNDS THE MOON
C) THE EARTH WAS PROBABLY NOT THE CENTRE OF THE UNIVERSE
D) NONE OF THESE

10) ISSAC NEWTON AND GOTTFRIED LEIBNIZ WORKING INDEPENDENTLY IN THE 17TH CENURY LAID THE FOUNDATION OF CLASSICAL PHYSICS AND ARE KNOWN AS FATHERS OF
A) ASTROLOGY
B) RELATIVISTIC THEORY
[B]C) INTEGRAL & DIFFERENTIAL CALCULUS
[B]D) NONE OF THESE

16) TIDES ARE GENERATED BY
A) THE MOVEMENTS OF SHIPS IN THE OCEANS
B) THE GRAVITATIONAL EFFECT OF MOON ANA SUN ON OUR EARTH
C) THE MOVEMENTS OF THE EARTH AROUND THE SUN
D) NONE OF THESE

18) ALTHOUGH THE MASS OF A MAN ON MOON REMAINS SAME AS ON THE EARTH,HE WILL
A) BE MUCH HAPPIER THERE
B) WEIGH ONE SIXTH AS MUCH
C) WEIGH TWICE AS MUCH
D) NONE OF THESE

21) A MATERIAL WITH HIGH ELASTICITY
A) DOES NOT RETURNS TO ITS ORIGIONAL SHAPE UPON BEING STRETCHED AND THEN RELEASED
B) RETURNS AS CLOSE AS POSSIBLE TO ITS ORIGIONAL SHAPE UPON BEING STRETCHED AND THEN RELEASED
C) CAN BE STRETCHEDTO INFINITE DISTANCES
D) NONE OF THESE

26) PHOTOGRAPHY WORKS BY
A) CAPTURING THE SOULS OF THE OBJECTS BEING PHOTOGRAPHED
B) CAPTURING LIGHT REFLECTED FROM THE OBJECT BEING PHOTOGRAPHED
C) BOTH A & B
D) NONE OF THESE

35) ARACHNOPHOBIA IS REFER TO A FEAR OF
A) SPIDERS
B) SNAKES
C) BATS
D) NONE OF THESE

41) WHICH OF THE FOLLOWING IS A LABELED AS “GOOD CHOLESTEROL” FOR HUMANS?
A) HIGH-DENSITY LIPOPROTEIN--------------HDL
B) LOW DENSITY LIPOPROTEIN--------------- LDL
C) VERY LOW DENSITY LIPOPROTEIN ------VLDL
D) NONE OF THESE

HDL (Good) Cholesterol
About one-fourth to one-third of blood cholesterol is carried by high-density lipoprotein (HDL). HDL cholesterol is known as "good" cholesterol, because high levels of HDL seem to protect against heart attack.


43) WHICH OF THE FOLLOWING IS A NON ESSENTIAL AMINO ACID?
A) ALANINE
B) METHENAMINE]
C) TYROSINE
D) NONE OF THESE

44) STARTING FROM HIGHER CHOOSE THE CORRECT SEQUENCE OF MOLECULES IN ORDER OF ENERGY YEILDING
A) SUGAR,FATS,PROTEIN
B) PROTEIN,SUGAR,FATS
C) FATS,SUGAR,PROTEIN
D) NONE OF THESE

48) PROTEINS ARE MADE UP OF
A) POLYNUCLEOTIDE
B) POLYPEPTIDE
C) POLYACETYLENE
D) NONE OF THESE
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  #29  
Old Monday, April 02, 2012
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[QUOTE=alimallah;418312]
Quote:
Originally Posted by Raja Bahar View Post
Every day science css-2012 objective

43) WHICH OF THE FOLLOWING IS A NON ESSENTIAL AMINO ACID?
A) ALANINE
B) METHENAMINE]
C) TYROSINE
D) NONE OF THESE

Dear correct answer is Tyrosine

http://en.wikipedia.org/wiki/Essential_amino_acid
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Old Monday, April 02, 2012
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[QUOTE=Arslan Shaukat;418505]
Quote:
Originally Posted by alimallah View Post


Dear correct answer is Tyrosine

http://en.wikipedia.org/wiki/Essential_amino_acid
Brother tyrosine is sometimes essential you can see from the table you have quoted. Alanine tops the list of non-essential amino acids.
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