2020 MARCH (+2)
PART B: ZOOLOGY
Answer any 3 questions from 1 - 5. Each carries 1 score.
1.
From the following, find out the
symbol used in the human pedigree analysis representing male.
2.
Name the technique of transferring
embryos up to 8 blastomeres into the fallopian tube.
a.
GIFT
b.
ZIFT
c.
ICSI
d.
IUI
3.
Microbe which help in the production
of Biogas.
a.
Aspergillus
niger
b.
Trichoderma
polysporum
c.
Saccharomvces
cerevisiae
d.
Methanobacterium
4.
Which of the following human
ancestor is more 'ape' like?
a.
Homo habilis
b.
Dryopithecus
c.
Australopithecines
d.
Homo erectus
5.
Select the cause of extinction of
Cichlid fish in Lake Victoria of East Africa.
a.
Habitat loss and fragmentation
b.
Over-exploitation
c.
Alien species invasions
d.
Co-extinctions
Answer any 9 questions from 6 - 16.
Each carries 2 scores. (9 x 2 = 18)
6.
Some examples of microbes in human
welfare are given. Classify them under the headings given below.
[Egs:
Rhizobium, Propionibacterium sharmanii, Azaspirillum, Lactic acid bacteria, Anabaena,
Azotobacter, Aspergillus niger Saccharomyces cerevisiae...]
|
Microbes
in Household Products |
Microbes
as Bio-fertilizers |
|
|
|
7.
Observe the figure given below
showing Mendel's experiment using pea plants.
a.
Identify the cross.
b.
Which are the laws proposed by
Mendel based on these observations?
8.
"All copulations lead to
fertilization and pregnancy". Do you agree with this statement? Justify
your answer.
9.
Fill the blanks in Column A and B
using appropriate terms.
|
Theory |
Scientists |
|
(a)
Theory of natural selection |
A |
|
(b)
Use and disuse of organs |
B |
|
(c)
Theory of mutation |
C |
|
(d)
Theory of spontaneous generation |
D |
10.
One of the salient features of
genetic code is "Universal".
a.
Write any other two salient features
of Genetic code.
b.
Which is the initiator codon? And
name the amino acid it codes.
11.
Amniocentesis for sex determination
is legally banned now.
a.
What is amniocentesis?
b.
Why it is banned?
12.
Name any two protozoan diseases, its
causative organism and any two symptoms.
13.
Tropical Amazonian rainforest in
South America has the greatest biodiversity on earth. Do you agree with this?
Explain.
14.
Complete the illustration chart
given below.
15.
Correct the following statements, if
there is any mistake:
a.
Haemophilia is an autosome linked
recessive disease.
b.
Turner's syndrome is due to the
presence of an additional copy of X chromosome.
16.
p2 + 2pq + q2
= 1 denotes an evolutionary principle.
a.
Name the principle.
b.
Mention any three factors affecting
this.
Answer any 3 questions from 17 - 20.
Each carries 3 score. (3 x 3 = 9)
17.
Observe the figure given below:
a.
Identify the process in the picture.
b.
Name any two enzymes needed for this
process.
c.
Write the peculiarities of the newly
synthesized daughter strands.
18.
Explain the measures useful for
prevention and control of alcohol and drugs abuse among adolescents.
19.
The graph given below shows the
level of the ovarian hormones in a normally menstruating woman during the
follicular phase.
a.
Name 'A' and 'B'.
b.
Reconstruct the graph showing the
level of hormones in luteal phase.
c.
Name the hormone secreted by Corpus
Luteum and mention its function.
20.
A DNA sequence is provided below.
5' -
ATGCATGCATGCATGCATGCATGCAT - 3'
a.
Write down the sequence of its
complementary strand.
b.
Name the enzyme involved in
transcription of DNA.
c. What would happen if both the strands of the DNA act as templates for transcription?