Code:755700
F"Y.B.Sc
Q.P,
Botany Paper II
Dated: 2+-LL'20L6
Model Answer Key for the Examiners
Q.1 (A) Choose correct options (1 mark each)
Answers:'
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(a) Calcium Pectate
(b) Light
(c) Animal cells
[d) 1:2:1
(e) Phenotype determines genotype
(f) TT x tt
(g) Succulent xeroPhYtes
(h) e:3:4
(i) Food chain
fi)
100/o
Q.1 (B) Answer in one sentence (2 marks
i.
each)
10 M
Ecosystem: Basic fundamental unit of studying ecology comprising of biotic and
abiotic components.
ii. 2"d Law of thermodynamics:
Non random ener$/ (chemical, mechanical and
radiant energy) cannot be transferred without degradation into heat energy.
Energy transfer is never t00o/o efficient
iii. Two functions of chloroplast Light and dark reactions of photosynthesis
carried out in stroma and grana.
iv. Structural proteins: Back-bone
v.
Heterozygote: IndMdual with 2 different alleles for a given character.
Q.2 Answer the
a)
of all cell membranes'
following
Cellwalt
o Structure & chemical composition (6 M)
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o
.
Function [2M)
Labelled diagram (2M)
b) Proteins and lipids associated with plasma
o
o
Lipids (5M)
cell
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Description (7M)
Labelled diagram (3M)
d) Bilipid layer model of plasma
.
o
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Proteins (5M)
c) Plant
o
o
membrane
membrane
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Description (7M)
Labelled diagram (3M)
Q.3 Answer the
following
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Forestecosystem
o Definition and concept (3M)
o Description of components (7M)
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b) Odum's Enerry flow model
o Definition and concePt (3M)
o Description of model with diagram (7M)
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c) Ecosystemandestuarineecosystem
o Definition of ecosystem (2M)
o Estuarine ecosystem - Definition, concep! description, example (8M)
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d) Energy pyramid with successive trophic levels
o Definition of energy pyramid (2M)
o Successive trophic levels - explanation with the help of diagram (BM)
a)
Q.4 Answer the
following
a) Dominant epistasis with
o
.
example
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Definition (2M)
Example with Fl and F2 crosses and ratio (8M)
b) Codominance and intermediate inheritance with examples
o Codominance - Definition, explanation with example (5M)
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o
Intermediate inheritance
c) Multiple alleles and ABO blood
- Definition, explanation with example [SM)
group
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o Definition (2M)
o Description of ABo brood group giving genotypes and phenotypes (gM)
d) Problembasedongeneinteraction
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o Data writing (2M)
. (i) - Crosses with progeny, ratio, genotype and phenotypes (4M)
o (ii) - Crosses with progeny, ratio, genotype and phenotypes (4M)
Q.5
Shortnotes (anyfour - SM
i. Eukaryotic cell
o
.
ii.
each)
Description - 3M,
Examples
- 2M
Component of endoplasmic reticulum
o
o
Description
- 3M
Diagram - 2M
iii. Abiotic components
o
o
Definition
-
2M,
Description - 3M,
iv. Food chain
o
o
Description - 3M,
Diagrammatic representation _ 2M
v. Complementarygenes
o
o
in sweetpea
Type of epistatic interaction, explanation _ 3M,
Modified FZ ratio - 2M
vi. Monohybrid ratio
o
o
Definition
- 1M
Example with F1 and F2 crosses and ratio _ 4M
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