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Total number of pages-8

26T BIOL (BOT-ZOO) (N)

2016

BIOLOGY

(Theory)

Full Marks : 70

Pass Marks : 21

Time : Three hours

The figures in the margin indicate full marks for the questions

PART-I (BOTANY)

MARKS - 35

Page No. 1 - 4

PART-II (ZOOLOGY)

MARKS - 35

Page No. 5 - 7

Use separate Answer scripts for Part-I (Botany)

and Part-II (Zoology)

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Contd.

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Assam Board Class 12 Biology Previous Year Question Paper 2016

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8. , Name two antibiotics that are produced from bacteria along with the namts(·" of concerned bacteria. 1 + 1 =2 � ·J C<ic*f.hn<l � '©�� �� �!0t1S1N<f$<l � � c}J�c<i1<M c,� � c<ic*Rm� � � 1

Or/W�

Name the microbes used for production of Acetic acid and Lactic acid.1+1=2

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9. How light influences the growth and development in plants? @rntt<i � � msP'l� C� C<f.Cr-ltfC<l � �?

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What are the special characteristics of parasitic plant ?. � � � 0F1'e>i�� � �?

2

2

10. Write note on : (any one)

� �rr g (fil � iJJ�) 2

y (Ji) Food Chain '°'ii (b) Tropic level

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("<I) C911IB<f. � I

11. Write the scientific names with their utility of the following plants.(½+½)x3=3

(a} Chinchona lbr-lC<f.f'TI

(b} Neem �

(c} Rauwolfia

'19(� Or/W�

Write the scientific �ames and their families of three important timber yieldingplants of Assam.

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(½+½) x3=3 = R Hl4� �rn1157-i'liQ <f.T3 -@�� � �@31H1i � '511� c� � 1 '5Pi�� C'"""' �

26T BIOL (BOT-ZOO) (N) [ 3 l Contd.

Part-II (Zoology)

(N��'5f�g��)

1. Fill in the blanks : (any two)Jx2==2

2.

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(a) Silkworms belong to the order 1:!f; aof t__"""'--"'­

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{b) The milk of 'Rosie', the first transgenic cow, contains human alpha

. ----....-.. � .. i � ti L I t ·, }ll 'i ) ' �� cn<tl�-fl� �' �m' 5if� � i5JW{<tit �.,� I

(c) The structure which provides connection between developing foetus and

uterus of the mother is called ----

��cq� � w�fif\5 �'R � ���� � ____ � 1

(d) Acrosome of sperm is formed from ___ _

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Answer any two :

NC<PfCitt � m mr � (a) Express the genotype of AB blood group.

AB <'1'8>qi;i<'l � �9f � f%M�9f � � I /

(b) What is algal bloom?/�"i;i't'ifC'f � RS ?

�Ix2=2

(c) Write the equation of 'Species-Area' relationship in a logarithmic scale.G1�� � '�-�' � �"f �� I

(d) Write scientific name of water hyacinth.� �IS31H15 � m1

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/ 3. Write answer of any four of the following :\!>iii\!> Nm �C<fSfc,r/ '/5/� m �� �

(a) Explain the chromosomal theory of inheritance.��xt� ��� � �</Jl � I

(b) What is Leydig cell ? State its function.�'If��?���� �I

26T BIOL (BOT-ZOO) (N) rs 1 Contd.

j

Or/��

Jjlriat are the consequences of loss of biodiversity?

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7. Write the Mendles laws of inheritance.

C�M� •R•t� >J_Jl>i�� m I

3

3

Or I��Explain incomplete dominance with example. 3

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8. How a healthy person aquires pneumonia? What are the causative organismsof the disease? State the symptoms of pneumonia. 1 + 1 +3=5

�� � � � C<llCiN<:il �� �5'f J'f�ffi �? �� �5'f 1m<fS� �� �?�'ml �'i'R ��I

Or/i5f�

Discuss the various means of prevention and control of drugs and alcohol abuse.

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9. Discuss the methodologies involved in the Human genome project. 5 � �� � c'f� � <fil<T�� � '51"l1ftilti--ll � I

Or/i5f�

Discuss the process of translation of genetic code.

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--x __

26T BIOL (BOT-ZOO) (N) [ 7 l

5

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