g. c. e a/l examination november - 2015 conducted by field
TRANSCRIPT
Grade:- 13 (2016) - November - 2015 1 Biology - II B
B. Essay
Answer only FOUR questions
05. a. Describe the aerobic respiration of glucose including important events, end products and places
where they occur.
b. Briefly describe the utilization of substrates other than glucose in respiration.
06. a. Explain the location, gross structure and functions of human stomach.
b. Briefly explain the role of endocrine system in the digestion of human.
07. a. Briefly explain the resting potential of a neuron.
b. Explain how the action potential takes place in a neuron.
c. Briefly explain how the reflex action process takes place in human.
08. Briefly describe the sarcomere of skeletal muscle and describe the gliding slide mechanism
of skeletal muscle.
09. a. Describe the structure of human placenta and its function.
b. Give the benefits of breast feeding.
10. Write short notes for the followings:
a. Significances of mitosis
b. Affects of cigarette smoking
c. Micro propagation
G. C. E A/L Examination November - 2015
Conducted by Field Work Centre, Thondaimanaru
In Collaboration with
Zonal Department of Education, Jaffna.
Grade: - 13 (2016) Biology - II
FWC
Grade:- 13 (2016) - November - 2015 1 Biology - II A
A. Structured Essay
Answer all questions in this paper itself.
01. A. i). Give the six important elements that constitute the living matter among the naturally
occurring 92 elements.
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ii). Indicate the elemental composition of the following biological molecules.
a. Ribulose ................................................................................................................
b. Chitin ................................................................................................................
c. Chlorophyll ................................................................................................................
iii). If the amount of cytosine in a DNA molecule is four times more, that of adinine. What
is the number of guanine bases in the molecules with 12000 nitrogen bases.
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iv). Indicate that in which structure the following organelles arise?
a. Peroxisome ................................................................................................................
b. Lysosome ................................................................................................................
v). Indicate the organelles for the following functions in plants.
a. Synthesis of lipids ……………………………………………………………………………………………………
b. Convert fat into carbohydrate …………………………………………………………………………………
c. Maintain osmotic balance into the cell ……………………………………………………………………
vi). Give the tissues that found in the following parts of the human
a. Epiglottis .........................................................................................................
b. Hypo dermis .........................................................................................................
c. Symphysis Pubis .........................................................................................................
G. C. E A/L Examination November - 2015
Conducted by Field Work Centre, Thondaimanaru
In Collaboration with
Zonal Department of Education Jaffna.
Time: - Three hours Grade: - 13 (2016) Biology - II
FWC
Grade:- 13 (2016) - November - 2015 2 Biology - II A
B. i). a. What is an enzyme?
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b. What is meant by an active site of an enzyme?
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ii). a. What is the name of the non protein components that is needed for many enzyme
functions?
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b. Give three types of the above component and give example for each.
Component Example
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iii). Give the types of enzyme inhibitors and give one example for each.
Inhibitor Example
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C. i). What is meant by classification of organisms?
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ii). Give three advantages of classifying organisms systematically.
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iii). Some structures found among animals are given below.
a. Three pairs of legs in thorax
b. Papillae
c. Aristotle’s lantern
d. Tentacle
e. Malphigion tubule
Indicate the structure/ structures found in the following animals
(i). Millipede .........................................................................................................
(ii). Sea Urchin .........................................................................................................
(iii). Grass hopper .........................................................................................................
(iv). Nereis .........................................................................................................
Grade:- 13 (2016) - November - 2015 3 Biology - II A
02. A i). What is respiratory surface?
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ii). Indicate the respiratory structure of the given animals.
a. Flat worm ................................................................................................................
b. Arenicola ................................................................................................................
c. Centipede ................................................................................................................
iii). a. What is the epithelial tissue found in the respiratory tract?
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b. Indicate a cell type found among the above epithelial tissue cells and give the
function.
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iv). What is vital capacity of an adult healthy human and give its value?
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v). Indicate the mode of transmission of conduction of CO2 in Blood.
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vi). Give the blood cell involved in the conduction of CO2 and indicate an enzyme found in
that cell for the transmissionof CO2.
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B. The following diagram show the cells found in the conduction tissue.
i). Name the followings.
A. .......................................................... B. ............................................................
C. .......................................................... F. ............................................................
G. .......................................................... H. ............................................................
Grade:- 13 (2016) - November - 2015 4 Biology - II A
ii). What is the substance the found in É’?
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iii). In which path/s water and minerals transported through ‘F’”.
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iv). How the water and minerals move in ‘H’?
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v). What are the important factors contribute to the movement of water and minerals in
‘H’’?
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vi). What are plant growth substances that transported through ‘H’?
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C. i). What is homeostasis?
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ii). Negative feedback is an important phenomenon in the maintenance of homeostasis.
What are the essential components of negative feedback?
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iii). What is the byproduct of muscle contraction used in homeostasis?
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iv). What is the normal value of glucose in the human blood stream?
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v). Name the hormones that increase the blood glucose level.
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3. A. i). Why the excretion is essential for living beings?
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ii). Name the basic excretory structural unit of the following.
a. Mollusca ................................................................................................................
b. Crustacea ................................................................................................................
c. Reptilia ................................................................................................................
Grade:- 13 (2016) - November - 2015 5 Biology - II A
iii). Indicate two disadvantages of urea as an excretory product in animals.
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iv). What are the components specific to proximal convoluted tubule in the human
nephron?
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v). Indicate four functions of human kidney other than excretory function?
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B. i). What is meant by endo skeleton?
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ii). Name two tissues that make the endo skeleton.
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iii). Which of the animal group having only exoskeleton?
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iv). What are the disadvantages of exoskeleton.
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v). Name a protista which having both endo and exoskeleton.
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C. Answer the questions i-v regarding the following diagram of human skull.
i). Name the bones indicated as a-e in the
above diagram.
a. ...........................................................
b. ..........................................................
c. ...........................................................
d. ..........................................................
e. ..........................................................
Grade:- 13 (2016) - November - 2015 6 Biology - II A
ii). Name the fontanelle found between c and d & d and e.
c - d .................................................................................................................................
d - e .................................................................................................................................
iii). Name the fontanelles found in the human skull other than you mentioned above(Cii).
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iv). Indicate two important functions of fontanelles.
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v). What are the single bones found in the cranium of the human, indicated in the above
diagram.
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vi). What is movement?
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vii). To which purposes the movement occurs in animals?
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4. A. i). What is meant by menstrual cycle?
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ii). Name the hormones that regulate the ovarian events in the menstrual cycle.
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iii). Indicate two functions of each hormones mentioned above.
Hormone ………………………
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Hormone …………………………
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Grade:- 13 (2016) - November - 2015 7 Biology - II A
iv). Indicate the life expectancy of human sperm and ovum.
Sperm ...............................................................................................................................
ovum ...............................................................................................................................
v). In which ways contraceptives are made in Depo provera?
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B. i). The following diagram shows the life cycle of a terrestrial plant.
Spores
a) ....................................... b) .......................................
Sporophyte; Anthridia Archaegonia
c) ....................................... d)..................................
e) .......................................
Zygote
i). Name the plant which shows the above life cycle.
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ii). Name a - e
a. ........................................................... b. .............................................................
c. ........................................................... d. .............................................................
e. ..........................................................
iii). Which structures are formed from mitosis in the above life cycle?
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Grade:- 13 (2016) - November - 2015 8 Biology - II A
iv). What is the special structure found in the C for the external fertilization?
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v). In which structure is formed by the ‘a’’?
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C. i). The followings are reproductive structures seen in gymnosperms. Name the
corresponding structure for each of them in an anthophyte flower.
* Microsporophyll ............................................................................................................
* Megasporophyll ............................................................................................................
ii). State three unique features seen in the life cycle of anigiosperms which canbe
considered as evolutionary adaptations for land habitat except double fertilization.
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iii). What is double fertilization?
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iv). What is a seed?
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v). Give three features of seeds have enabled seed plants to colonize in land.
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