Biology paper
class 10
 photosynthesis
MM30
1. name the followings.
A. green colour substance in plants.
B. structure containing thylakoids.
C. piles of thylakoids .
D.split of water molecules by light energy .
E.conversion of ADP into ATP.

2. select the most appropriate option. A.which one is not required for photosynthesis
a. carbon dioxide
b. oxygen
c. light
d.water
B.components of chlorophyll are
a. carbon
b.magnesium
c. nitrogen
d.all of these
C. glucose is synthesized in
a.light dependent phase
b. light independent phase
c. both of these phases
d. none of these
D. the main( primary) function of stomata is to
a. let the carbon dioxide enter
 Inside the leaf
b.to let oxygen released into the atmosphere
c.transpiration
d.all of these
E.which of the following is not an adaptation for photosynthesis
a. large surface area of leaves
b.transparent cuticle
c. numerous stomata
d. numerous chloroplasts on lower surface of leaves .
3.how will the following effect rate of photosynthesis
1.scarcity of water 2.rise in temperature 3.mineral deficiency
4.which is the location of the following structures mentioned in brackets
1.chlorophyll( thylakoids )
2.stomata( leaves )
5.explain why
1.chlorophyll appears green
2. grass grown in Shade turns yellow
6.term dark phase  is not appropriate for light independent phase
7. briefly explain
1.potassium ion concentration theory .
2.RuBP and Rubisco
8. given below is a diagrammatic representation of the internal structure of the organelle in plant cell study the same and answer the questions that follow
















1.identify the organelle.
 2.name the physiological process occurring in the organelle
3/. mention one way in which this processes beneficial to man.
4.name the phases of the process occurring in the part labelled as 1 and 2.
5. A chemical substance NADP plays an active part in one of the phases. Write the expanded form of NADP and state its role in above process.
6. Represent the physiological process mentioned in question 2 in the firm of chemical reaction.


7. The diagram below represent an experiment conducted to prove the importance of photosynthesis. study the same and answer the questions that follow.














1. name the factors being studied in the experiment .
2.why was the plant kept in a dark room before conducting the experiment
3.why was the experimental leaf then kept in a. boiling water b. methylated spirit
4. name the solution used to test for presence of starch in the leaf .
5.wat will we observe in the experimental leaf  at the end of the starch test .
6.give a balanced chemical equation to represent the process of photosynthesis.

Biology paper: Transpiration
MM 30.

A.name the followings
1. Openings on stem through which transpiration takes place .
2.a paper that turns pink when exposed to moisture
3.a plant in which stomata are sunken.
4..any two parts of leaf that allow transpiration.
5.A device used to Measure water intake by plant .

B.differentiate between the following on the basis of factors mentioned in the bracket
1.lenticel and stomata (opening and clothing)
2. transpiration and guttation (structure involved )
C.explain how
1. transpiration helps in bringing rain .
2.transpiration is a price paid for photosynthesis 3.transpiration helps to generate suction force .
D.how will the following factors influence the rate of photosynthesis?    1.decrease in atmospheric pressure 2.increase in humidity outside plant  3.increase in temperature
E.How are following structures useful to plant.
1. spines in cacti
2.shrunken stomata
F.given below is an apparatus used to study a particular phenomena in plants study the same and answer the questions that follows














1.Name the Apparatus
2.mention the limitations of this apparatus.
3. what is the function of the part marked reservoir .
4.which phenomena is studied with help of this apparatus.
5. What is the role of air bubble in the experiment?

G. Given below is an experimental set up to study a particular process.

• 
  

1. Name the process being studied.
2.Explain the process named in above question 1.
3.why is the pot covered with plastic sheet.
4.mention one way in which the process is beneficial to the plant.
5.suggest a suitable control for this experiment.

 Ashwani Kumar ,Biology teacher ,Patel Nagar,phagwara 9646388266

Biology paper.Absorption by roots.
 ICSE Class10.                            MM30
1.The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow :

A. What is the state of the cell Shown in figure.
B. name the structure that acts as a selectively permeable membrane.
C label the parts numbered 1to4 in the diagram .
D.how can the above cell be  brought back to its original condition ? mention the scientific term for the  recovery of the cell.
E. state any two features of the above plant cell which is not present in animal cells.

2. Choose the correct option from them four options given below
A. a plant cell may burst when
a. turgor pressure equalises  wall pressure.
b turgor pressure exceeds wall pressure.
c wall pressure exceeds turgor pressure d.none of the above

B. Marine  fish when placed in tap water bursts  due to
a.endosmosis b.exosmosis
c.diffusion  d.plasmolysis

C. The space between the the cell wall and plasma membrane in a plasmolysed Cell is filled with
a. isotonic solution
b. hypotonic solution
c.hypertonic solution 
d.water

D.which of the following  is a characteristic not related with the  suitability of the roots for absorbing water .
a. Tremendoys surface area
b.contains cell sap at a higher cincentration than the surrounding soil water.
c.root hairs have thin cell  wall.
d.grow downwards into the soil .

E. Absorption of  water by  plant cells by  surface attraction is called 
a.diffusion 
b.osmosis
c. imbibition 
d.none of these 

F.highest water potential in Osmosis is  that  of 
a.pure  water 
b.10% salt solution
c. 50% sugar solution 
d.honey

3. Differentiate between the following pairs  on the basis of what is mentioned within the brackets 
a.diffusion and osmosis( definition)
b. cell wall and cell membrane ( permeability c.transpiration and guttation ( structures involved )

4.give reasons
a. potato cubes when placed in water become firm and increase in size
b. drooping  of leaves of Mimosa pudica  on being touched

5. name the following
a. pressure of cell content on cell wall 
b.a process by which root hairs absorb  water from soil 
c.the process of uptake of mineral ions against the concentration gradient using energy from the cell .
d.membrane which allows the passage of molecules selectively 
e.a solution in which relative concentration of water molecules and solutes  on either side of cell membrane is same.

6 briefly explain the following terms
a. turgidity  
b.plasmolysis 
c.osmosis 
d.osmotic pressure

7. The figure given below is a diagrammatic representation of a  part of the transverse section of the root  in the root hair zone  .study the same and then answer the following questions 








a.name the parts indicated by  guidelines one to  4 

b.which is the process that enables the passage of water from the soil into the root hair.
c. name the pressure  that is responsible for the movement of water in the direction indicated by arrows 
d.due to excess of this pressure  sometimes drops of water are  found along the leaf margins  of some plants especially on in early morning. what is this phenomena  called? 
e.draw well labelled diagram of the root hair cell as it would appear if excess of fertilizer is added to the soil close to it

By:Ashwani Kumar,Biology teacher,Vigyan Tutorials,Guru Hargobind Nagar Road,patel nagar,Phagwara.9646388266.

Biology paper.Absorption by roots.
 ICSE Class10.                            MMr30
1.The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow :

A. What is the state of the cell Shown in figure.
B. name the structure that acts as a selectively permeable membrane.
C label the parts numbered 1to4 in the diagram .
D.how can the above cell be  brought back to its original condition ? mention the scientific term for the  recovery of the cell.
E. state any two features of the above plant cell which is not present in animal cells.

2. Choose the correct option from them four options given below
A. a plant cell may burst when
a. turgor pressure equalises  wall pressure.
b turgor pressure exceeds wall pressure.
c wall pressure exceeds turgor pressure d.none of the above
B. Marine  fish when placed in tap water bursts  due to
a.endosmosis b.exosmosis
c.diffusion  d.plasmolysis
C. The space between the the cell wall and plasma membrane in a plasmolysed Cell is filled with
a. isotonic solution
b. hypotonic solution
c.hypertonic solution
d.water
3.

Biology paper, GENETICS , ICSE Class10      MM30
1.a. state Mendels law of dominance.
  B.a pure tall plant TT, is crossed with pure dwarf plant tt,draw punnett square to show F2 generation
C.give the phenotype of F2 generation.
D.give the phenotype and genotype ratio of F1 and F2 generation.
E. Name any one X linked disease found in humans.

2. A homozygous plant having round R,and yellow (Y), seeds is crossed with plant having wrinkled (r) and green(y) seeds.
A.give the scientific  name of the planton which Mendel conducted experiments .
B.give the genotype of F1 generation.
C.give the dihybrid phenotypic ratio and phenotype of offsprings of F2 generation when two plants of F1 generation are crossed.
D.name and state the law which explains the dihybrid ratio.
E.give the possible combination of gametes that can be obtained from F1 hybrids.

3.explain the following terms
A.Mutation
B. Homologous chromosomes
  C. Alleles
D.monohybrid cross
E.phenotype.

4.given below are groups of terms. In each group the first pair indicates the relationship between the two terms.rewrite and complete the secondpair on a similar basis
A. Albinism : recessive : : polydactyly:
B.TT: homozygous dominant : : Tt :
C. X linked : haemophilia: : y linked:

5. Give technical term for the following
A.all genes present in an  organism .
B. Small differences among individuals .
C.alternative form of a character .
D. The allele of a gene which which express itself only in homozygous state.
E.arrangement  of chromosome photographs according to their shape and size.

6. In a homozygous pea plant ,axial flowers (A), are dominant over terminal flowers (a).draw a punnett square board to show the gametes and offsprings when both the parents are heterozygous for axial flowers.give phenotypic and genotypic ratio of this cross.

7. A colour blind  man got married to a carrier woman . is their possibility of the colour blind daughter.spupport your answer with punnett square .

8.explain term criss cross inheritance

Biology paper, ICSE, Class10

Biology practice paper ,class10.         MM30.
1.name the following
A. crossing over takes place.
B. a cell organelle (except nucleus)without  DNA.
C.a cell that do not divide
D.phase in which chromosomes get
arranged at equator .
E.A term for division of cytoplasm . 5.

2/choose the correct answer from each of four options below.
1.chromosomes reach at poles in
A.anaphase B.telophase
C.prophase  D .metaphase
2.meiosis occurs in
A. Testis B. Anthers
C. Ovaries D.all of these
3.chromosome number after meiosis is
A. 2n B. n
C.3n.  D.4n. 3

3. In each of set of terms given below, there is an odd one and cannot be grouped in the same category towhich other two belong.identify the odd term in each set and name the category to which remaining two catogories belong.
1.asters,furrow,cell plate
2.G1,S,anaphase
3.mitochondria,lysosome,chloroplasts 3.
4/complete the following paragraph by filling the blanks.
A. In interphase RNA and proteins are z synthesised in ..........phase.the cell may enter .......phase or enter in next .......phase for DNA synthesis.more DNA and proteins are synthesised in ........
Phase.                                                4.

5.A.draw a labelled diagram of an animal cell in late prophase
B. How is it different from prophase in plant cell.
C.name the phase next to prophase.3
6.give technical term for the folowing
A. The chromosomes received from mother
B.exchange of parts of chromatids between homologous chromosomes in meiosis
7.give reason
A.meiosis1 is a reductional division but not meiosis2
B. Number of chromosomes in cell formed by mitosis remains same. 2.
8/.state the exact location of the following structures
A.pole of spindle
B.equator of spindle. 2.
9.given below are 7 terms .of these 6 can be placed into 3 matching pairs.
Cytokinesis,equator ,metaphase,haploid,meiosis,G2,cell plate.     3
10.differentiate between the followi ng pairs on the basis of what is mentioned in the brackets
1. Mitosis and meiosis ( division of cytoplasm)
2/mitosis and meiosis ,,( variations).  2.

11.differentiate between chromosome and chromatid.  1/

Noise Pollution

Noise pollution is any disturbing sound that adversely affects the living organisms .technically the sound sound level above 30 decibel fall in the category of noise .sound frequency is measured in hertz. human hearing range is from 50 heartz to15000 Hertz .the sound waves having frequency below 50 hertz are called infrasonic and the sound waves having frequency above 15000 Hertz are called ultrasonic. power of sound per unit area is called sound intensity . Its unit is watt per metre squareW/m2. decibel is named after Graham Bell. General conversation producers 60 dB, loud conversation producers 70 dB ,scooter engine 80dB and truck engine produces about 90 dB, jet engine about 150 dB and rocket propulsion about 180 dB of noise.

sources of noise pollution: Industries vehicles ,loudspeakers, agriculture machinery ,crackers ,Dynamite blast at construction sites, domestic gadgets like mixture grinder ,vacuum cleaner television, radio army tanks,ammunition explosion etc are some common sources of pollution .

Effects: noise pollution adversely affects hearing ability of person .sound above 150 dB can permanently damage eardrum or dislocate ear ossicles .regular daytime exposure of sound above 80 decibel can reduce 15 dB hearing capacity in 10 years .person feels uncomfortable ,anxiety increases which in turn  can cause hypertension ,hormonal changes ,headache, digestion problem, increase in heartbeat ,Insomnia etc.exposure to high noise level can have bad effect on nervous system of developing baby .



effect on animals : high noise level have adverse affect on hearing ability, causes anxiety ,hormonal changes in animals .studies have shown that Exposure to high noise levels for longer. Studies have shown that exposure to high sound levels for longer periods in animals disturb  egg laying and hatching from eggs.

 control of noise pollution noise pollution :
laws should be implemented strictly .machines should be designed in such a way that they produce minimum noise. use of loudspeakers should be regulated strictly by law .use of crackers should be minimum .noiseless cracker or low sound crackers should be used .big cities should be divided into four zones .silence zone ,it is near hospitals and educational Institutes . there is residential zone, commercial zone and industrial zone .in Silence zone use of loudspeakers ,use of horns is not allowed .building should be designed in such a way that minimum noise enters the building from outside. green muffler or green belt can also reduce the noise level  .vegetation absorbs sound waves, therefore it is called green muffler .green muffler should be maintained on either side of road and railway tracks. it not only reduces noise but also reduces air pollution and dispersal of dust generated by moving vehicles. wide tree belts should be grown around industrial areas .we can use ear plugs and muffs to protect our ears from high noise levels .they block the entry of noise in ears.