CHAPTER WISE QUESTIONS BASED ON LAST FIVE
YEARS CBSE QUESTION PAPER.
CHAPTER
1. REPRODUCTION:
1.YEAR
: 2010-11
1. Mention the unique flower phenomenon
exhibited by Strobilanthus kunthiana?
(1)
2. a. State the difference between meiocyte and gamete
with respect to chromosome
Number?
(2)
b. Why is a
Whiptail lizard referred to as parthenogenesis?
(2)
2.YEAR
2011 -12
1. Define a clone?
(1)
2. Name the plant that produces flowers
once in 50 years?
3.
YEAR 2012 -13
1. A
male honey bee has 16 chromosome where its female has 32 chromosome. Give one
reason?
(1)
2. As a senior biology student you have been asked to
demonstrate to the students of secondary level in your school, the procedure(s)
that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would
suggest and provide reasons for each one of them?
(5)
4.YEAR 2013-2014
1. The cell division involved in gamete formation is not of
the same type in different organisms. Justify?
(2)
2. Distinguish estrous cycle from menstrual cycle? (1)
5.YEAR 2014-15
1. In a developing embryo, analyse the consequence if cell
division are not followed by cell differentiation?
(2)
CHAPTER:
2 REPRODUCTION IN FLOWERING PLANTS:
1.YEAR
: 2010-11
1. Where is sporopollenin present in
plants? State its significance with reference to its chemical nature?
(2)
2. How does the megaspore mother cell develop
in 7-celled, 8- nucleate embryo sac in
an angiosperm? Draw a labeled diagram of a mature embryo sac? (5)
2.YEAR
– 2011 -12
1. What is the advantage of vegetative
propogation?
(3)
2. Give the characteristics of wind
pollinated flowers?
(2)
3.
YEAR 2012 -13
1. Draw a neat labeled diagram of the
various stages in the development of a microspore?
(2)
2. Bring out the difference between
chasmogamous and cleistogamous flowers?
( 2)
4.YEAR
2013-14
1. Draw a diagram of a section of a megasporangium of an
angiosperm and label funiculus, micropyle, embryosac and nucellus.
(3)
2. Name the organic material exine of the
pollen grain is made up of. How is this
material advantageous to pollen grain? (2)
5.YEAR
2014-15
1. Still it is observed that it does not form a
continuous layer around the pollen grain.
Give reason.
(3)
2.How are ‘pollen banks’ useful?
3.
CHAPTER: 3 HUMAN REPRODUCTION
1.YEAR
2010- 11
1. Explain the ovarian events in human
female?
(5)
2.YEAR
2011-12
1. Write the location and function of the
sertoli cells in human. (1)
2. Explain outbreeding devices.
(2)
3.YEAR
2012-13
1. Write the function of each one of the
following:
(3)
a. Fimbriae
b. coleoptile
c. oxytocin
4.YEAR
2013-14
1. (a) Explain the
menstrual phase in a human female. State
the levels of ovarian and pituitary hormones during this phase.
(b) Why is follicular phase in the menstrual
cycle also referred as proliferative phase? Explain.
(5)
5.YEAR 2014-15
1.Explain the events that occur in a graffian follicle at the
time of ovulation and thereafter.
2.Draw a graffian follicle and label antrum
and secondary oocyte.
(3)
CHAPTER:
4 REPRODUCTIVE HEALTH
1.YEAR
2010-11
1. A couple is eager to know the sex of the
unborn child. What diagnostic technique
will you suggest? What social abuse is associated with the application of this
technique? (2)
2. Bring about the main differences between
CuT and LNG-20? (1)
2.YEAR
2011-12
1. Mention the problems that are taken care of by
Reproduction and Child Health Care programme. (3)
3.YEAR 2012-13
1. What is
amniocentesis and why there is statutory ban on it?
(3)
4.YEAR
2013-14
1. A large number of married couples the world over are
childless. It is shocking to know that
in India the female partner is often blamed for the couple being
childless.
(3)
5.YEAR 2014-15
1. Suggest and explain any three assisted reproductive
technologies to an infertile couples.
(3)
CHAPTER:
5 PRINCIPLES OF INHERITANCE:
1.YEAR
2010-2011
1. A garden pea plant produced inflated
yellow pod and another plant of the same species produced constricted green
pods. Identify the dominant traits. (1)
2. Name the cross which is having phenotype
and genotype ratio are similar. Work out the cross with suitable example(3)
2.YEAR
2011-12
1. What is the inheritance pattern observed
in the size of starch grains and seed shape of pisum sativum? Work out the
monohybrid cross showing the above traits. How does this pattern of inheritance
deviate from that of mendelian law of dominance? (5)
3.YEAR
2012-13
1. What is the sex and the condition of sex
chromosome in an individual with Turners syndrome?
(2)
2. Differentiate between dominance and co
dominance.
(2)
3. What is a test cross? How can it decipher the heterozygosity of
plant? (3)
4.YEAR
2013-13
1. The egg of an animal contains 10
chromosomes, of which one is X chromosome. How many autosomes would there be in
the karyotype of this animal. (1)
2. Explain the ABO blood group with
suitable examples
(3)
5.YEAR
2014-15
1. Why Mendel selected the pea plant in his
experiment?
(3)
2. Explain the sex determination in human?
How it different from birds. (3)
CHAPTER
: 6
MOLECULAR
BASIS OF INHERITANCE:
1.YEAR
2010-11
1. Draw neat labeled sketch of a
replicating fork of DNA
(2)
2. Following are the features of genetic
codes. What does each one indicate? (2)
Stop codon: Unambiguous codon; Degenerate
codon; Universal codon.
2.YEAR
2011-12
1. It is established that RNA is the first
genetic material. Explain giving reasons. (3)
3.YEAR
2012-13
1. a. Name the enzyme responsible for the
transcription of tRNA and the amino acid the initiator tRNA gets linked with.
b. Explain the role of initiator tRNA in
intiation of protein synthesis. (3)
4.YEAR
2013-14
1. Describe meselson and stahl’s experiment that was carried in
1958 on E.coli .
Write the conclusion they arrived at after the experiment.
(a) Describe the
process of transcription in bacteria. (5)
(b) Explain the
processing the hnRNA needs to undergo before becoming functional mRNA
in eukaryotes
5.YEAR 2014-15
1. How did Griffith explain the transformation principle with
example of virulent and non virulent bacteria.
(5)
CHAPTER:
7 EVOLUTION
1.YEAR
2010-11
1. Describe the Millers experiment with
labeled diagram?
(3)
2.Year
2011-12
1. Write the similarity between the wing of
a butterfly and the wing of a bat. What do you infer from the above with
reference to evolution.
(1)
2. State the theory of Biogenesis. How does
Miller experiment support this theory?
(3)
3.YEAR
2012-13
1.’’Sweat potato tubers and potato tubers
are the result of convergent evolution.”Justify the statement. (2)
2.DDT was known to be highly effective
insecticide in the past. Why did it not wipe out all mosquito population.
(3)
4.Year
2013-14
1. Write the two key concept of Darwin
theory?
(2)
2. What is convergent evolution? (1)
5.YEAR
2014-15
1. In England during the post
industrialised period the count of melanic moths increased in urban areas but
remained low in rural areas, Explain. (5)
CHAPTER8:
HUMAN HEALTH AND DISASES:
1.YEAR
2010-11
1. How does smoking tobacco in human lead
tooxygen deficiency in their body? (1)
2. a. High light the role of thymus asa
lymphoid organ.b. Name the cells that are released from the above mentioned
gland. Mention how they help in immunity . (2)
2.YEAR
2011-12
1.Name the plant source of the drug
popularly called smack. How does it effect the body of the abuser.
(2)
2. It is generally observed that the children who had
suffered from chicken-pox in their childhood may not contract the same disease
in their adulthood. Explain giving
reasons the basis of such an immunity in an individual. Name this kind of immunity. (3)
3. what are
interferons? Mention their role.
3.YEAR 2012-13
1 a. Name the protozoan parasite that
causes amoebic dysentery in human.
b.
Mention two diagnostic symptoms of the disease.
c. How is this disease transmitted to others.
(2)
4.YEAR
2013-14
1. Draw the flow chart of malarial parasite
life cycle and labell all the transmissions? (3)
5.YEAR
2014-15
1. Differentiate between two types of
cancer?
(2)
Write the diagnostic methods to detect cancer.
(3)
CHAPTER:
9 MICROBES IN HUMANWELFARE
1.YEAR
2010-11
1. Why is rhizobium categorized as a
symbiotic bacterium. How does it act as a biofertiliser?
(2) 2.
Name the microbe which is responsible for produce statin (1)
2.YEAR
2011-12
1. Name the two different categories of
microbes naturally occurring in sewage water. Explain their role in cleaning
sewage water into usable water. (3)
3.YEAR
2012-13
1.
Hoe does starter added to milk help it to set into curd?
(2)
2.
Name the methods of STP.
(1)
4.YEAR 2013-14
1.
What are flocs? When is Ganga Action plan started? (2)
2.
Give the significance of biofertilisers.
(2)
5.YEAR 2014-15
1.
Explain the role of bacculovirus as biological control agents. Mention their
importance in organic farming.
(3)
CHAPTER:
10. STRATEGIES IN FOOD PRODUCTION
1.YEAR
2010-11
1. Name the following:
a. The semi dwarf variety of wheat which is
high yielding and disease resistant.
b. Any one inter-specific hybrid
mammals.
(1)
2.Mention the role of ‘genetic mother’ in
MOET.
(1)
2.YEAR
2011-12
1. Mention two advantages of micro propagation. (3)
Give two
examples where it is commercially adopted. (3)
3.YEAR 2012-13
1.How do organic farmers control pests? Give two examples. (3)
2.State the difference in their approach from that of
conventional pest control methods. (2)
4.YEAR 2013-14
1. Enumerate in sequential order the 4 steps that a
plant breeder should follow to obtain a diease resistant crop
(3)
2. What is interspecific hybridization.
(2)
5.YEAR 2014-15
1. What is single cell protein?
What is the
significance of such a protein? (3)
CHAPTER
11. PRINCIPLE OF BIOTECHNOLOGY
1.YEAR
2010-11
1. Explain the work carried out by cohen
and boyer that contribute immensely in biotechnology?
(2)
2. Draw a schematic sketch of pBR 322
plasmid and label the following in it.
a. any two restriction site
b. ori and rop genes
c. an antibiotic resistant gene (3)
2.YEAR
2011-12
1. Suggest four important steps to produce
a disease resistant plant through conventional
Name
a genus of baculovirus. Why are they considered good biocontrol agents? (3)
2.
While doing a PCR denaturation step is missed, what will be its effect on the
process?(2)
3.YEAR 2012-13
1.
Diagrammatically represent the experimental steps in cloning and expressing a
human gene into bacterium like E.coli?
(5)
4.YEAR 2013-14
1.
For which variety of Indian rice patent was filed by a USA company? (1)
2.
Name the insect pest that is killed by the products of cryIAc gene? (2)
5.YEAR 2014-15
1.
What does competent refer to in competent cells used in transformation? (3)
2.
What is meant by gene cloning?
(1)
CHAPTER
12 BIOTECHNOLOGY APPLICATION
1.YEAR
2010-11
1. a. State the DNA ligase in
biotechnology.
(1)
b. what happens when meloidegyne incognitia
consumes cells with RNAi gene?
(2)
2.YEAR
2011-12
1. Name the genes responsible for making Bt
cotton plants resistant to bollworm attack.
2.How do such plants attain resistant
against bollworm attacks.explain (3)
3.YEAR
2012-13
1.What do ‘Y’ and ‘B’ stand for in ‘YAC’
and BAC’ used in Human Genome Project (HGP).
Mention
their role in the project. (3)
2. Expand ELSI. Write the main two methods od
HGP.
(3)
4.YEAR 2013-14
1.Write the percentage of the total human
genome that codes for proteins and the (3) percentage of discovered genes
whose functions are known as observed during HGP.
5.YEAR
2014-15
1. What is ADH. Explain treatment to cure
the deficiency?
(3)
2. How did Eli Lilly synthesise the human
insulin? (2)
CHAPTER:
13 ORGANISM AND POPULATION.
1.YEAR
2010-11
1. An orchid plant is growing on the branch
of mango tree. How do you describe this interaction between the orchid and the
mango tree? (2)
2. Why do predators avid eating Monarch
butterfly? How does the butterfly developthis protective feature?
(3)
2.YEAR
2011-12
1. What is Allens rule?
(1)
2. Nature hasa carring capacity for a
species. Explain (3)
3.YEAR
2012-13
1. Explain the three basic types of
interspecific interaction.
(3)
4.YEAR
2013-14
1. (a) Name the two growth models that represent population
growth and draw the respective growth curves they represent.
(b) State the basis for the difference in the
shape of these curves.
(c) Which one of the curves represent the human
population growth at present?
Do you think
such a curve is sustainable? Give reason in support of your answer. (5)
5.YEAR 2014-15
1.
Explain the exponential growth model of a population with diagram and
curve (3)
CHAPTER:
14 ECOSYSTEM
1.YEAR
2010-11
1. Lichens is considered a good example of
obligate mutualism. Explain. (3)
2.YEAR2011-12
1. a. Explain the significance of
ecological pyramids with the help of an example.
b. Why are the pyramids referred to as ‘upright or ‘inverted’. (5)
3.YEAR
2012-13
1. What is cry preservation? Give its one
reason?
(3)
YEAR 2013-14
2. Differentiate between primary and secondary succession. Provide one example of each.
(3)
4.YEAR
2013-14
1.Construct a grazing food chain and
detritus food chain usinh the following,with five links each:
Earthworm,bird,snake,vulture,grass,grasshopper,frog,decaying
plant matter (1)
2.a What is meant by ecological
succession?Explain how it occurs.
b.
what properties distinguish a pioneer community from climax community. (3)
5.YEAR 2014-15
1. Differentiate between two different types of
biomass with the help of one example of each
(3)
2. What is upright pyramid of biomass. (2)
CHAPTER:
15 BIODIVERSITY AND CONSERVATION.
1.YEAR
2010-11
1. Describe the process of decomposition of
detritus.
(5)
2.YEAR
2011-12
1. Under what condition woild a particular
stage in the process of succession revert back to an earlier stage?
(1)
2. Differentiate between insitunand exsitu
conservation.
(3)
3.YEAR2012-13
1. Differentiate between primary and secondary succession. Provide one example of each.
(3)
4.YEAR 2013-14
1. Name the alien fish species which is posing a
threat to the indigenous catfishes in our rivers.
(2)
2. What is hot spot. Give two examples.
(3)
5.YEAR 2014-15
1. What are sacred groves. Where are sacred groves
found in India. Name any four .
(3)
2. What is cryopreservation?
(1)
CHAPTER
:16 ENVIRONMENTAL ISSUES.
1.YEAR
2010-11
1. Explain biomagnification of DDT in an
aquatic food chain. How does it effect the bird population.
(3)
2.YEAR
2011-12
1. Describe electrostatic precipitator
along with a diagram? (5)
3.YEAR
2012-13
1. What is eutrophication?
(1)
2. Explain the relationship between CFC’s
and Ozone in the stratosphere (2)
4.YEAR
2013-14
1. Why is it desirable to use unleaded
petrol in vehicles fitted with catalytic converters?(2)
2. Expand BOD?
5.YEAR
2014-15
1. What is the rawmaterial of
polyblend?
(2)
2. Eutrophication is the natural aging of a
lake. Explain
(3)
EXTRA
ADDITIONAL QUESTIONS
1.Mention the role of ‘genetic mother’ in
MOET.
(1)
2.What is biopiracy?
(1)
3.Mention two advantages for preferring CNG
over diesel as an automobile fuel. (1)
4.Write the probable differences in eating
habits of Homo habilis and Homo erectus. (1)
5.A Single pea plant in your kitchen garden
produces pods with viable seeds, but the indivi
dual papaya plant does not. Explain. (2)
6.Following are the features of genetic
codes. What does each one indicate? (2)
Stop codon: Unambiguous codon; Degenerate
codon; Universal codon.
7.Suggest four important steps to produce a
disease resistant plant through conventional
Name a genus of baculovirus. Why are they
considered good biocontrol agents? (2)
8.Explain the relationship between CFC’s
and Ozone in the stratosphers (2)
9.Why are sacred highly protected? (2)
10.Name the organic material exine of the
pollen grain is made up of. How is this
material advantageous to pollen grain? (3)
11.Still it is observed that it does not form a
continuous layer around the pollen grain.
Give reason. (3)
12.How are ‘pollen banks’ useful? (3)
13.Mention the problems that are taken care of by
Reproduction and Child Health Care programme. (3)
14.What is amniocentesis and why there is statutory
ban on it? (3)
15.What is a test cross? How can it decipher the heterozygosity of
plant? (3)
16.What do ‘Y’ and ‘B’ stand for in ‘YAC’ and BAC’
used in Human Genome Project (HGP).
Mention their role in the project. (3)
17.Write the percentage of the total human genome that
codes for proteins and the (3)
percentage of discovered genes whose functions are known as observed during
HGP.
18.Differentiate between homology and analogy. Give the example of each. (3)
19.It is generally observed that the children who had
suffered from chicken-pox in their childhood may not contract the same disease
in their adulthood. Explain giving
reasons the basis of such an immunity in an individual. Name this kind of immunity. (3)
20.what are interferons? Mention their role.
21.Write the two limitations of traditional breeding
technique that led to promotion of micro propagation. (3)
22.Mention two advantages of micro propagation. (3)
23.Give two examples where it is commercially adopted. (3)
24.How do organic farmers control pests? Give two examples. (3)
25.State the difference in their approach from that of
conventional pestcontrol methods.(3)
26.Name the selectable markers in the cloning vector
pBR322?Mention the role they play.(3
27.Why is the coding sequence of an enzyme
B-galactosidase a preferred selectable to the ones named above? (3)
28.Why must a cell b made ‘competent’ in biotechnology
experiments? How does calcium ion help
in doing so? (3)
29.State the role of ‘biolistic gun’ in biotechnology
experiments. (3)
30.Explain enzyme-replacement therapy to treat
adenosine deaminase deficiency. Mention
two disadvantages of this procedure. (3)
31.Name and explain the type of interaction that
exists in mycorrhizae and between cattle egret and cattle. (3)
32.Differentiate between primary and secondary
succession. Provide one example of each.
(3)
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