Here are important 2 marks questions for 10th Class / SSC public exams
in Telangana and AP. The questions are from Physical Sciences subject
for English medium students.
Q: Why does we get dew on the surface of cold soft drink bottle kept
in open air?
A: It is because of condensation of water molecules in the air on the
surface of cold drink bottle. When the water molecules in air, during
their motion strike the surface of cold soft drink bottle, they loose
their kinetic energy. When the water molecules loose their energy
their temperature falls down and so they condense as water droplets on
the surface of the bottle.
Q: What is baking powder? How does it make the cake soft and spongy?
A: Baking powder is a mixture of baking soda and tartaric acid.
When baking powder is heated it releases CO2 gas due to which the cake
rises and becomes soft and spongy.
Q: Why is the angle of reflection equal to the angle of incidence when
a light ray gets reflected from a surface?
A: Light selects a path which takes least time to travel.
This principle was first given by Fermat an amateur mathematician. It
is also applicable to reflection of light. When light gets reflected
from a surface, it selects the path that takes the least time. This is
why the angle of incidence is equal to the angle of reflection.
Q: What do you mean by corrosion? How do you prevent it?
A: Corrosion: When some metals are exposed to moisture, acids etc,
they tarnish due to the formation of respective metal oxide on their
surface. This process is called corrosion.
Corrosion can be prevented or at least minimised by shielding the
metal surface from oxygen and moisture. It can be prevented by
painting, oiling, greasing, galvanizing, chrome plating or making
alloys.
Q: Equal amounts of water are kept in a cup and a dish. Which will
evaporate faster? Why?
A: Water in the dish evaporates faster than that in the cup. The rate
of evaporation of a liquid depends upon its surface area exposed. As
more surface of water in a dish is exposed than in a cup, water
evaporates faster in the dish.
Q: Why does transfer of heat energy take place between objects? (1 Mark)
A: When two objects are placed in thermal contact, heat energy will be
transferred from the hotter body to the 'colder body'.
Transfer of heat energy take place between two objects due to
temperature difference in the objects.
Senior Inter Botany Imp Questions and Answers - Respiration in Plants
Following are important 4 marks questions for IPE exams from Senior
Inter Botany subject. The questions are useful for AP and Telangana
Intermediate students. The questions and answers are from Respiration
in Plants chapter.
Q: Explain various complexes involved in Electron Transport System of
respiration.
A: ETS involves 5 complexes.
1. Complex I = NADH dehydrogenase
2. Complex II = Succinic dehydrogenase
3. Complex III = Cytochrome C reductase
4. Complex IV = Cytochrome C oxidase
5. Complex V = ATP synthase
These are all present in inner membrane of mitochondrion.
Complex I receives e− from Mitochondrial NADH2 and conveys it to
complex III through UQ.
Complex II receives e− from FADH2 and conveys it to complex through UQ.
Complex III gives e− to complex IV through cyt C.
Complex IV gives e− to oxygen.
Complex V forms ATP by oxidative phosphorylation.
Q: Describe the structure of complex V and explain the process of
oxidative phosphorylation as explained by chemiosmotic hypothesis.
A: Complex V is chemically a proteinaceous enzyme called ATP synthase.
It has two parts. 1) F0, 2) F1. The enzyme is present in
the inner membrane of mitochondria. F0 is present towards
perimitochondrial space and F1 is protruded into the matrix.
F0 forms proton channel. Protons pass through F0 and fall into F1. It
is the head piece and rotates always. It is the site of protein
synthesis. Peter mitchel proposed chemi osmotic model. According
concentration gradient, H+ from perimitochondrial space pass through
F0 into F1. For every
3H+, 1 ATP is produced.
Q: What is the common pathway for aerobic and anaerobic respirations?
Where does it take place? (2 Marks)
A: The common pathway for aerobic and anaerobic respirations. It
occurs in cytosol where all the enzymes (10) required for it are
present.
Inter Botany subject. The questions are useful for AP and Telangana
Intermediate students. The questions and answers are from Respiration
in Plants chapter.
Q: Explain various complexes involved in Electron Transport System of
respiration.
A: ETS involves 5 complexes.
1. Complex I = NADH dehydrogenase
2. Complex II = Succinic dehydrogenase
3. Complex III = Cytochrome C reductase
4. Complex IV = Cytochrome C oxidase
5. Complex V = ATP synthase
These are all present in inner membrane of mitochondrion.
Complex I receives e− from Mitochondrial NADH2 and conveys it to
complex III through UQ.
Complex II receives e− from FADH2 and conveys it to complex through UQ.
Complex III gives e− to complex IV through cyt C.
Complex IV gives e− to oxygen.
Complex V forms ATP by oxidative phosphorylation.
Q: Describe the structure of complex V and explain the process of
oxidative phosphorylation as explained by chemiosmotic hypothesis.
A: Complex V is chemically a proteinaceous enzyme called ATP synthase.
It has two parts. 1) F0, 2) F1. The enzyme is present in
the inner membrane of mitochondria. F0 is present towards
perimitochondrial space and F1 is protruded into the matrix.
F0 forms proton channel. Protons pass through F0 and fall into F1. It
is the head piece and rotates always. It is the site of protein
synthesis. Peter mitchel proposed chemi osmotic model. According
concentration gradient, H+ from perimitochondrial space pass through
F0 into F1. For every
3H+, 1 ATP is produced.
Q: What is the common pathway for aerobic and anaerobic respirations?
Where does it take place? (2 Marks)
A: The common pathway for aerobic and anaerobic respirations. It
occurs in cytosol where all the enzymes (10) required for it are
present.
Senior Inter Botany Imp 2 Marks Questions - Respiration in Plants
Following are important questions and answers for IPE Exams in AP and
Telangana for Senior Intermediate. These are 2 marks questions from
the chapter - Respiration in Plants.
Q: What is the specific role of F0 - F1 particles in respiration?
A: F0 - F1 particles (Previously called Oxysomes or elementary
particles) are present in the inner membrane of mitochondria (or
thylakoid membranes of chloroplast). They are considered as Complex V
(ATP synthase). F0 is hydrophilic and present towards
perimitochondrial space. F1 is hydrophobic and present towards matrix.
F0 acts H+ channel. F1 is the smallest rotating machine and active
site of ATP synthesis.
Q: When does anaerobic respiration occur in man and yeast?
A: Anaerobic respiration occurs in muscle cells of man, and yeast when
oxygen is not available.
Q: What cellular organic substances are never used as respiratory substrates?
A: Pure proteins and fats are never used as respiratory substrates.
Q: Why is the RQ of fats less than that of carbohydrates?
A: When fats are used as substrates in respiration, less CO2 is
evolved for more O2 absorbed. So RQ is less than that of carbohydrates
(i.e. less than 1).
Q: What is meant by 'Amphibolic' pathway?
A: The respiratory pathway is an amphibolic pathway as it involves
both anabolism and catabolism. Basically it is catabolic pathway. But
the carbon skeleton produced during respiration is used as a precursor
for biosynthesis of other biomolecules.
Ex: á - Ketoglutaric acid is useful in the synthesis of an amino acid
called Glutamic acid.
Q: Name the mobile electron carriers of the respiratory electron
transport chain in the inner mitochondrial membrane.
A: Ubiquinone (UQ) is a mobile electron carrier between Complex I &
Complex III, Complex II and Complex III. Cyt C is a mobile electron
carrier between Complex III and Complex IV of the mitochondrial inner
membrane.
Q: What is the final acceptor of electrons in aerobic respiration?
From which complex does it receive electrons?
A: Oxygen is the final acceptor of electrons in aerobic respiration.
It receives electrons from Complex IV.
Q: Do you know of any step in Krebs Cycle where there is a substrate
level phosphorylation? Explain.
A: During the conversion of succinyl - CoA to succinic acid a molecule
of GTP is synthesised. This is a substrate level phosphorylation
(SLP). In a coupled reaction GTP is converted to GDP with simultaneous
synthesis of ATP from ADP.
Telangana for Senior Intermediate. These are 2 marks questions from
the chapter - Respiration in Plants.
Q: What is the specific role of F0 - F1 particles in respiration?
A: F0 - F1 particles (Previously called Oxysomes or elementary
particles) are present in the inner membrane of mitochondria (or
thylakoid membranes of chloroplast). They are considered as Complex V
(ATP synthase). F0 is hydrophilic and present towards
perimitochondrial space. F1 is hydrophobic and present towards matrix.
F0 acts H+ channel. F1 is the smallest rotating machine and active
site of ATP synthesis.
Q: When does anaerobic respiration occur in man and yeast?
A: Anaerobic respiration occurs in muscle cells of man, and yeast when
oxygen is not available.
Q: What cellular organic substances are never used as respiratory substrates?
A: Pure proteins and fats are never used as respiratory substrates.
Q: Why is the RQ of fats less than that of carbohydrates?
A: When fats are used as substrates in respiration, less CO2 is
evolved for more O2 absorbed. So RQ is less than that of carbohydrates
(i.e. less than 1).
Q: What is meant by 'Amphibolic' pathway?
A: The respiratory pathway is an amphibolic pathway as it involves
both anabolism and catabolism. Basically it is catabolic pathway. But
the carbon skeleton produced during respiration is used as a precursor
for biosynthesis of other biomolecules.
Ex: á - Ketoglutaric acid is useful in the synthesis of an amino acid
called Glutamic acid.
Q: Name the mobile electron carriers of the respiratory electron
transport chain in the inner mitochondrial membrane.
A: Ubiquinone (UQ) is a mobile electron carrier between Complex I &
Complex III, Complex II and Complex III. Cyt C is a mobile electron
carrier between Complex III and Complex IV of the mitochondrial inner
membrane.
Q: What is the final acceptor of electrons in aerobic respiration?
From which complex does it receive electrons?
A: Oxygen is the final acceptor of electrons in aerobic respiration.
It receives electrons from Complex IV.
Q: Do you know of any step in Krebs Cycle where there is a substrate
level phosphorylation? Explain.
A: During the conversion of succinyl - CoA to succinic acid a molecule
of GTP is synthesised. This is a substrate level phosphorylation
(SLP). In a coupled reaction GTP is converted to GDP with simultaneous
synthesis of ATP from ADP.
Subscribe to:
Comments (Atom)