Chlorophyll mystery.
 

[QUOTE=SADIA SHAFIQ;408636]Yes, it is. Before answering answer my one question. What is bacteria?[/QUOTE]

Chlorophyll is a green pigment found in cyanobacteria and the chloroplasts of algae and plants. It absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water.

Formula: C55H72O5N4Mg.

[QUOTE=NADEEMANJUM92;407917]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. Schezophrenia is a
Mental desease

50. Which of the following are founded in the nucleus?
a) lysosomes
b) |chromosomes
c) ribosomes
d) none of these[/QUOTE]

Question no 36 is very confusing...bcoz all these three options are the part of DNA...Can anyone elaborate it...

chlorophyll is not a cell

hahaha miss saadia made me laughed chlophyll is a cell!!! ans shakir mehmood answer is dTMP

[QUOTE=transition;547740]hahaha miss saadia made me laughed chlophyll is a cell!!! ans shakir mehmood answer is dTMP[/QUOTE]

dear other two are also the part of DNA:):)

no as as far as im remembring..there are total three bonds between base,sugar and phosphate molecule,,no another bond can be made.....so it can only be deoxyribosemonophosphate,,,,,not di or tri phosphate!!!! Got it!!!

[QUOTE=transition;547838]no as as far as im remembring..there are total three bonds between base,sugar and phosphate molecule,,no another bond can be made.....so it can only be deoxyribosemonophosphate,,,,,not di or tri phosphate!!!! Got it!!![/QUOTE]

then dGTP is correct bhai..which is Deoxyguanosine triphosphate is component of DNA. it is one of 4 nitrogenous basis used for DNA synthesis.the other three are adenine,thymine,cytosine.these four bases+deoxyribose sugar and phosphate group join to form DNA double helix.kia khayal ha

its so simple,,,,im amazed....dTMP,,,,because subunit of dna is nucleotide n nucleotide is made up of sugar,base and a phosphate molecule

ocean tides.
 

WHAT CAUSES THE TIDES?
Tides are periodic rises and falls of large bodies of water. Tides are caused by the gravitational interaction between the Earth and the Moon. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Since the earth is rotating while this is happening, two tides occur each day. Isaac Newton was the first person to explain tides scientifically.



The Sun's Interaction with the Tides

Spring Tides
Spring tides are especially strong tides (they do not have anything to do with the season Spring). They occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.


Proxigean tide
The eccentricity of the orbit of the moon in this illustration is greatly exaggerated.
The Proxigean Spring Tide is a rare, unusually high tide. This very high tide occurs when the moon is both unusually close to the Earth (at its closest perigee, called the proxigee) and in the New Moon phase (when the Moon is between the Sun and the Earth). The proxigean spring tide occurs at most once every 1.5 years.


you could also go through this links ,for images. [url]http://www.enchantedlearning.com/subjects/ocean/Tides.shtml[/url]

bacteria is a prokaryote that causes diseases both in plants and humans.