Answer: 1)b) Oxygen is not produced as a result of cellular respiration. Apart from Oxygen, all other items listed are produced as end-products of cellular respiration whereas on the other hand Oxygen is used as the terminal electron acceptor in case of aerobic respiration which by accepting electrons gives rise to water.. 2)a) A controlled experiment can have only one variable. In any controlled experiment all the factors which are to be taken into account while performing a particular experiment should remain constant throughout the experiment. For any controlled experiment there will be a dependent and another independent variable which varies during the experiment but remaining all other factors should remain constant otherwise proper results can never be obtained. 3)b) The standard to which the outcome of a test is compared is known as the control. In any experiment, the results obtained both qualitatively and quantitatively are always compared with a control experiment set up to serve as a reference for the actual experiment. 4) a) Light reactions take place in the thyllakoid membrane (thyllakoids are coin like structures located in the chloroplasts stacked one upon the other and constitutes the grana of the chloroplasts) . Chlorophyll present in the thyllakoids captures the light essential for this reaction. It gives rise to oxygen as a by-product obtained as a result of photolysis of water (Hill reaction) and involves transfer of electrons between the two photosystems as well as reduction of NADP to NADPH. 6) d) Steroid is not a carbohydrate it belongs to the category of derieved lipids. It does not possess any pyranose or furanose ring structures found in carbohydrates rather it is composed of a steroid nucleus in its structure (cyclopentanoperhydrophenanthrene ring sysytem). 8) The smallest classification category is Species. According to principles of Linnean hierarchy followed in establishing taxonomic positions of an organism, species lies at the bottom of the table and may be considered as the smallest classification category. Identical organisms having same characteristic attributes are grouped together as one species. 9) a) By definition, matter is considered to be anything that has mass and takes up space (has a volume). 10) d) Ion is not a subatomic particle. Apart from ion, all other options listed comes under the bracket of sub-atomic particles because they constitute atoms- the smallest particle of an element. An ion on the other hand is also an atom but it is not electrically neutral, it has a charge due to non-identical number of protons and electrons in that atom. Solution Answer: 1)b) Oxygen is not produced as a result of cellular respiration. Apart from Oxygen, all other items listed are produced as end-products of cellular respiration whereas on the other hand Oxygen is used as the terminal electron acceptor in case of aerobic respiration which by accepting electrons gives rise to water.. 2)a) A controlled experimen.

1. Answer:
1)b) Oxygen is not produced as a result of cellular respiration.
Apart from Oxygen, all other items listed are produced as end-products of cellular respiration
whereas on the other hand Oxygen is used as the terminal electron acceptor in case of aerobic
respiration which by accepting electrons gives rise to water..
2)a) A controlled experiment can have only one variable.
In any controlled experiment all the factors which are to be taken into account while performing
a particular experiment should remain constant throughout the experiment. For any controlled
experiment there will be a dependent and another independent variable which varies during the
experiment but remaining all other factors should remain constant otherwise proper results can
never be obtained.
3)b) The standard to which the outcome of a test is compared is known as the control.
In any experiment, the results obtained both qualitatively and quantitatively are always compared
with a control experiment set up to serve as a reference for the actual experiment.
4) a) Light reactions take place in the thyllakoid membrane (thyllakoids are coin like structures
located in the chloroplasts stacked one upon the other and constitutes the grana of the
chloroplasts) . Chlorophyll present in the thyllakoids captures the light essential for this reaction.
It gives rise to oxygen as a by-product obtained as a result of photolysis of water (Hill reaction)
and involves transfer of electrons between the two photosystems as well as reduction of NADP
to NADPH.
6) d) Steroid is not a carbohydrate it belongs to the category of derieved lipids. It does not
possess any pyranose or furanose ring structures found in carbohydrates rather it is composed of
a steroid nucleus in its structure (cyclopentanoperhydrophenanthrene ring sysytem).
8) The smallest classification category is Species.
According to principles of Linnean hierarchy followed in establishing taxonomic positions of an
organism, species lies at the bottom of the table and may be considered as the smallest
classification category. Identical organisms having same characteristic attributes are grouped
together as one species.
9) a) By definition, matter is considered to be anything that has mass and takes up space (has a
volume).
10) d) Ion is not a subatomic particle. Apart from ion, all other options listed comes under the
bracket of sub-atomic particles because they constitute atoms- the smallest particle of an
element. An ion on the other hand is also an atom but it is not electrically neutral, it has a charge
due to non-identical number of protons and electrons in that atom.

2. Solution
Answer:
1)b) Oxygen is not produced as a result of cellular respiration.
Apart from Oxygen, all other items listed are produced as end-products of cellular respiration
whereas on the other hand Oxygen is used as the terminal electron acceptor in case of aerobic
respiration which by accepting electrons gives rise to water..
2)a) A controlled experiment can have only one variable.
In any controlled experiment all the factors which are to be taken into account while performing
a particular experiment should remain constant throughout the experiment. For any controlled
experiment there will be a dependent and another independent variable which varies during the
experiment but remaining all other factors should remain constant otherwise proper results can
never be obtained.
3)b) The standard to which the outcome of a test is compared is known as the control.
In any experiment, the results obtained both qualitatively and quantitatively are always compared
with a control experiment set up to serve as a reference for the actual experiment.
4) a) Light reactions take place in the thyllakoid membrane (thyllakoids are coin like structures
located in the chloroplasts stacked one upon the other and constitutes the grana of the
chloroplasts) . Chlorophyll present in the thyllakoids captures the light essential for this reaction.
It gives rise to oxygen as a by-product obtained as a result of photolysis of water (Hill reaction)
and involves transfer of electrons between the two photosystems as well as reduction of NADP
to NADPH.
6) d) Steroid is not a carbohydrate it belongs to the category of derieved lipids. It does not
possess any pyranose or furanose ring structures found in carbohydrates rather it is composed of
a steroid nucleus in its structure (cyclopentanoperhydrophenanthrene ring sysytem).
8) The smallest classification category is Species.
According to principles of Linnean hierarchy followed in establishing taxonomic positions of an
organism, species lies at the bottom of the table and may be considered as the smallest
classification category. Identical organisms having same characteristic attributes are grouped
together as one species.
9) a) By definition, matter is considered to be anything that has mass and takes up space (has a
volume).
10) d) Ion is not a subatomic particle. Apart from ion, all other options listed comes under the
bracket of sub-atomic particles because they constitute atoms- the smallest particle of an
element. An ion on the other hand is also an atom but it is not electrically neutral, it has a charge
due to non-identical number of protons and electrons in that atom.