Time 3hrs
mm70
General instructions :- 1.all questions are compulsory.
2 the question paper consists of five sections A,B,C,D and E.sectionA consists of 5 questions of 1 mark each.sectionb is of 5 questions of 3 marks each,section C is of 1 questions of 3 marks whereas section D is of d questions of 5 marks each.section E is OTBA of 10marks (2 questions of 5 marks each) .
3.question number 20 is value based question.4.there is no overall choice.however,an internal choice has been provided in one question of 2 marks,one question of 3 marks and all the three questions of 5 marks weightage. A student has to attempt only one of the alternatives in such questions. 5.wherever necessary the diagrams drawn should be neat and properly labelled
Section A
1.the cell wall of cells of a plant tissue shows the presence of hemicellulose and pectin.name the tissue.
2.name the scientist who proposed binomial nomenclature for organisms
3.the flow of impulses in a nerve is unidirectiona.give one reason.
4.state the function of heterocyst in nostoc
5.how is RNA differ from DNA in terms of nitrogenous base?
section B
6.give the schematic representation of the steps of glycolysis/
7.what is the source of vasopressin hormone? Where is it stored?name the target organ of this hormone.state its function
8 given below are the pairs animals and their phylum from which they belong.which out of these is not a matching pair and why ?
Unio -mollusca,culex - arthropoda ,pheretima - aschelminthes,fasciola - platyhelminthes
9.write names of four classes of fungi and the nature of mycelia present in them or both gymnosperms and angiosperms bear seeds,yet they are classified separatetely.give reason.
10.bile lacks enzymes yet it is essential for digestion.why?
section c
11.what is symbiotic nitrogen fixation? Explain the role of leghaemoglobin and enzyme nitrogenase in atmospheric fixation
Answer the following :
1.name the stress hormone found in plants.2.write cause of bakane disease of rice.
13. A transverse section of a stem of a tree shows concentric rings.how are these rings formed? State the significance of ther rings
14. Describe the following as asked against each. 1.gizzard in cockroach : function 2.open vascular system : one example 3.heart name of tissue
15. Draw the basic structure of neural synapse and label the following parts in it : pre synaptic membrane, post synaptic membrane ,synaptic vesicles,neurotransmitter,
A.explain the role of loop of henle in urine formation in humans.
B. Draw the labelled diagram of nephron /
section E (OTBA)
24. The stress of modern day living is causing an enormous burden on health care globally.comment upon the problem arising due to this stress and suggest possible solutions
25.can one lead a healthy life without compromising his contribution towards growth and development of the organization and the nation at large ? Explain.
BY: ASHWANI KUMAR @VIGYAN TUTOTIARLS. PATEL NAGAR OPP ANOOP HOSPITAL PHAGWARA 9646388266
mm70
General instructions :- 1.all questions are compulsory.
2 the question paper consists of five sections A,B,C,D and E.sectionA consists of 5 questions of 1 mark each.sectionb is of 5 questions of 3 marks each,section C is of 1 questions of 3 marks whereas section D is of d questions of 5 marks each.section E is OTBA of 10marks (2 questions of 5 marks each) .
3.question number 20 is value based question.4.there is no overall choice.however,an internal choice has been provided in one question of 2 marks,one question of 3 marks and all the three questions of 5 marks weightage. A student has to attempt only one of the alternatives in such questions. 5.wherever necessary the diagrams drawn should be neat and properly labelled
Section A
1.the cell wall of cells of a plant tissue shows the presence of hemicellulose and pectin.name the tissue.
2.name the scientist who proposed binomial nomenclature for organisms
3.the flow of impulses in a nerve is unidirectiona.give one reason.
4.state the function of heterocyst in nostoc
5.how is RNA differ from DNA in terms of nitrogenous base?
section B
6.give the schematic representation of the steps of glycolysis/
7.what is the source of vasopressin hormone? Where is it stored?name the target organ of this hormone.state its function
8 given below are the pairs animals and their phylum from which they belong.which out of these is not a matching pair and why ?
Unio -mollusca,culex - arthropoda ,pheretima - aschelminthes,fasciola - platyhelminthes
9.write names of four classes of fungi and the nature of mycelia present in them or both gymnosperms and angiosperms bear seeds,yet they are classified separatetely.give reason.
10.bile lacks enzymes yet it is essential for digestion.why?
section c
11.what is symbiotic nitrogen fixation? Explain the role of leghaemoglobin and enzyme nitrogenase in atmospheric fixation
Answer the following :
1.name the stress hormone found in plants.2.write cause of bakane disease of rice.
13. A transverse section of a stem of a tree shows concentric rings.how are these rings formed? State the significance of ther rings
14. Describe the following as asked against each. 1.gizzard in cockroach : function 2.open vascular system : one example 3.heart name of tissue
15. Draw the basic structure of neural synapse and label the following parts in it : pre synaptic membrane, post synaptic membrane ,synaptic vesicles,neurotransmitter,
16.explain the
mechanism of muscle contraction
17.why is mitosis called equational
division? State any four points of difference between mitosis and
meiosis.
18. Classify the plastids on the basis of type of pigments
present in them and give their functions or give the scientific terms
for the following processes a.loss of water from leaves through stomata
in the form of water vapours.c.water absorbed by solids causing them to
enormously increases in volume.
19.explain the mechanism of ascent of
sap
.20.mohit, a 15 years old student thinks that smoking makes him more
energetic.hence he tries to smoke when he is with his peer group.his
friend rahul advises him to avoid smoking. A.which respiratory disorder
is caused by cigarette smoking? B.Give adverse effect of this
disorder.c.write any two values used by rahul in counselling his
friend.
21.how are proteins formed? Describe the primary,secondary and
tertiary structure of proteins/
or
a. Which cell organelle is also called
as power house of cell. b.describe its structure with labelled
diagram.c.how do these cell organelles reproduce?
22. A.what is
photophosphorylation?
B.where do this mechanism occur in plant cells ?
C.explain the process of cyclic photophosphorylation
or
A. Where does
electron transport system operative in mitochondria? Explain the system
giving the role of oxygen.
B.what is oxidative phosphorylation ?
23.how
do arteries and veins differ in regard to 1.presence of semilunar valves
2.presence of blood. B.explain the different segments in a standard
ECG
A.explain the role of loop of henle in urine formation in humans.
B. Draw the labelled diagram of nephron /
section E (OTBA)
24. The stress of modern day living is causing an enormous burden on health care globally.comment upon the problem arising due to this stress and suggest possible solutions
25.can one lead a healthy life without compromising his contribution towards growth and development of the organization and the nation at large ? Explain.
BY: ASHWANI KUMAR @VIGYAN TUTOTIARLS. PATEL NAGAR OPP ANOOP HOSPITAL PHAGWARA 9646388266
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