F.Y"B.Sc
Botany Paper ll
Q.p. Code:755703
Dated: 22-11-2016
Model Answer Kev for the Examiners
O.1 (A) Choose correct options (1 mark each)
Answers:-
10M
(a) grana
(b) Cellwall
(c) Ca-pectate
(d) Tansley
(e) aquatic
(f)
10o/o
(g) back cross
(h) 2
(i) 15:1
0) 50%
(l.1 (B) Answer in one sentence (2 marks
each)
10 M
i.
Endoplasmic reticulum: protein folding & transport
ii.
Heredity: transmission of Characters from parents to next generation
iii. Trophic level:
iv.
v.
any class of organisms that occupy the same position in a food
chain, as primary consumers, secondary consumers, and tertiary consumers.
Mitosis : a type of cell division that results in two daughter cells each having the
same number and kind of chromosomes as the parent nucleus occurs in somatic cell,
typical of ordinary tissue growth.
Producer: An autotrophic organism that serves as a source of food for other
organisms in
a food chain.
Producers include green plants, which produce food
through photosynthesis, and certain bacteria that are capable of photosynthesis,
vi.
Q.2 Answer the following
a) Fluid mosaic model of Plasma membrane
10M
. Description (6M)
. Labelled diagram (4M)
b) Chloroplast
10M
.
.
.
Description (4 M)
Function at least 6 (3M)
Labelled diagram (3M)
c) Plant Gell
.
.
d) Cell
.
.
Structure
10M
&
cell organells (7 M)
Labelled diagram (3M)
memb.
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Description of any
l model (7M)
Labelled diagram (3M)
Q.3 Answer the following
a) Esturine
.
o
.
Ecosystem
Definition and location (3M)
colTrponents (75M)
significance (5M)
b) Ecological
.
.
Pyramid
Description of 3 type with diagrams (7M)
thermodynamics
1d law
2nd
10M
with explaination wrt ecosystem (5M)
law with explaination wrt ecosystem (5M)
d) Food chain and
.
.
10M
Definition and concept (2M)
c) Laws of
.
.
10M
types
10M
Definition and concept (3M)
Types with schematic representation and description (7M)
Q.4 Answer the following
a) Epistatis, recessive epistasis with
o
o
Definition (2M)
Exarnple with F1 and F2 crosses and ratio (8M)
b) Independent assortment
10M
.
example
Law (2M)
10M
o
Example with F1 and F2 crosses and ratio (8M)
c) gene interaction with example comb pattern
"
o
Definition (2M)
Example with F1 and F2 crosses and ratio (8M)
d) Problem based on epistasis
.
.
o
(i) - Crosses with progeny, ratio, genotype and phenotypes (4M)
(ii) - Crosses with progeny, ratio, genotype and phenotypes (4M)
Plasmodesmata & function
.
.
il
10M
Data writing (2M)
Q.5 Short notes (any four - 5M each)
i.
10M
Description
functions
- 3M,
- 2M
Phagocytosis
.
Description
o
Diagram
- 3M,
-2M
ill Forest ecosystem
. Description - 3M,
o €X?mple - 2M
iv. Upright energy flow model
.
.
Description
Diagram
- 3M,
-2M
v. Codominance
r
o
Description
Example
- 3M,
- 2M
Vi. lntermediate inheritance
.
o
Description
Example
- 3M,
- 2M
***********************
20M