PART: I
[BOTANY]
Group A (5 x 1 = 5)
Circle the correct answer from the given alternatives.
1. There
are many types of chromosomal disorders in organisms, among them euploidy is
very common in the population. Which one of the following conditions is true
for euploidy?
a. Addition or deletion of one or more chromosome in diploid chromosome
b. Addition of one or more chromosome in diploid chromosome
c. Deletion of one or more chromosome in diploid chromosome
d. Addition or deletion of one set or more than one set of chromosomes in
diploid chromosome.
2. The
formation of two male gametes is a peculiar feature in angiosperm. If the first
male gamete is fused to oosphere, in which part does the second male gamete
fuse?
a. Synergids
b. Egg cell
c. Polar nuclei
d. Antipodal cell
3. The
given vascular bundle is highly specialised by centripetal protoxylem. What is
it called?
a. Exarch
b. Endarch
c. Mesarch
d. Centrach
4. Which
of the following plants is used as bio fertilizer?
a. Ko/vox
b. Funaria
c. Azolla
d. Rhizopus
5. When
a plant cell is placed in hypertonic solution, it gets plasmolysed as shown in
the diagram. Which of the following occupies the space between the cell wall
and the shrunken protoplast in such plasmolysed cell?
a. Water
b. Hypertonic solution
c. Isotonic solution
d. Hypotonic solution
Group B (4 x 4 = 16)
Give short answers to the following questions.
1. The
anatomical structure of vascular plant is given. Study the given diagram and
answer the following questions. (1+3=4)
(a) Write the main characteristics of the given layer Y.
(b) Draw the given diagram and label the tissues which is responsible for
secondary growth. Elaborate the activities of this tissue up to the formation
of cambial ring.
2. Write
the salient features of a monocot embryo in reference to its development
pattern with diagrams. (3+1=4)
3. “Micropropagation
is an analytical and conventional bulk breeding technique for rapid cloning of
desirable stock”. Justify the statement by describing it briefly with the
various stages of micropropagation technique in plants. (4)
4. What
is genetic material? Describe the structure and functions of RNA. (1+2+1=4)
OR
What are plant growth hormones? Write the physiological
functions of auxin. Mention its shortcoming of hyper use in crops.
GROUP ‘C’ (2 x 8 = 16)
Give long answers to the following questions.
5. One
of the Mendelian inheritances states that ’The alleles of different traits can
be segregated during gametogenesis and passed independently’. State and explain
the essential pattern of inheritance verifying the statement with examples
showing cross up to second filial generation with chart and ratio. (1+ 3+2+2=
8)
OR
In Drosophila, an eye colour is X-linked. Explain. If white
eye female Drosophila is crossed to red-eye male Drosophila, what result do you
expect? Analyse briefly with the help of crosses.
6. How
are the Glycolysis and Krebs (TCA) cycle linked? Draw a detailed flow chart of
the Krebs cycle? (4+ 4= 8)
PART: II
[Zoology]
Group ‘A’ (6 x 1 = 6)
Circle the correct answer from the given alternatives.
1. The
parasympathetic nervous system releases a hormone acetylcholine. Which one of
the following is activated by this hormone?
a. Regulate the involuntary response
b. Decrease the rate of heart beat
c. Increase blood pressure
d. Increase myocardial contractility.
2. After
the release of mature ovum from the ovary, the Graffian follicle changes into
corpus luteum which is the source of female sex hormones. In the woman, what
would be the condition of corpus luteum in absence of pregnancy?
a. Secretes FSH and LH continuously
b. Secretes oxytocin and relaxin
c. Automatically degenerates after sometime
d. Remains intact and active.
3. Which
of the following statement is more appropriate for early an amniocentesis test?
a. It takes place between 15 and 20 weeks of pregnancy
b. It may cause fetal injury and lethality
c. It helps to detect fetal complications
d. It may cause infertility.
4. What
are the main processes involved in gastrulation of a frog?
a. Epiboly, involution, cleavage
b. Epiboly, invagination, Involution
c. Involution, epiboly, invagination
d. Involution, invagination, cleavage.
5. Blood
cells are formed in the bone marrow. What is the process of formation of blood
called?
a. Haemopoiesis
b. Haemolysis
c. Lymphopoiesis
d. Erythroblastosis.
6. A
person suddenly falls down and becomes unconscious. A doctor checked and said
that it is due to inadequate blood supply to the brain. What would be the type
of disorder?
a. Asthma
b. Syncope
c. Heart attack
d. Oedema.
Group ‘B’ (4
x 4 = 16)
Give short answers to the following questions.
1. Compare
and contrast areolar tissue and adipose tissue. 2+2=4
2. Describe
the process of fertilization of an egg with reference a frog. 4
OR
Describe the various steps applied in poultry farming. 4
3. Study
the given diagram and answer the following questions. 1+3=4
(a) Label A and B.
(b) Write any three differences between A and B.
4. Overpopulation
is a major issue in the development of the nation. Highlight the socio-economic
problems caused by overpopulation and mention how to solve such problems. 2+2=4
Group ‘C’ (2
x 8 = 16)
5. Mention
the causative agent, mode of transmission, symptoms and control measures of
tuberculosis in the community. (1+2+3+ 2 =8)
6. Draw
a labelled diagram of the alimentary canal of a human being. Explain the
mechanism of the digestion of foods that a person under takes. What would
happen in digestion when the pancreas is removed? (3+4+1)
OR
Draw a labelled drawing of respiratory system of a human being. Why and how
oxygen and carbon dioxide are exchanged rapidly in the lungs? What would happen
if a person moves to high altitude? Write your views on how to solve it. (2 +4+
1+1 =8)