ANNUAL EXAM. – 2024
XI Science Biology (56) Max. Marks: 70
Date: /03/2024 (6 Pages) Time:
3 Hrs.
General
Instructions:
1.
Question paper consists of 31
questions divided into FOUR sections,
namely A, B, C and D.
(1) Section A: Q. No. 1 contains 10 multiple choice
type questions carrying
one mark each.
Q.
No. 2 contains 8 very short answer type questions carrying
one mark each.
(2) Section B: Q No. 3 to Q. No. 14 are 12 short
answer –I type questions
carrying two marks each.
Attempt
any eight questions.
(3) Section C: Q. No. 15 to Q. No. 26 are 12
short answer – II type questions
carrying three marks each.
Attempt
any eight questions.
(4) Section D: Q. No. 27 to Q. No. 31 are 5 long
answer type
questions carrying four
marks each.
Attempt
any three questions.
2.
Figures to the right indicate full marks.
3.
Start each section on new page.
4.
Evaluation of each MCQ would be done for the first attempt only.
5. Draw neat, labelled diagrams wherever necessary.
SECTION –A
Q.
1. Select and write the correct answer: (10)
(i) Which is not a property of living
being?
a) Reproduction
b) Growth
c) Metabolism
d) Decay
(ii) Anaerobic
bacteria helping in curdling of milk is ...................
a)
Azotobacter
b)
Streptomyces
c)
Lactobacilli
d)
Nostoc
(iii) Find the odd one out.
a) Thyroid gland
b) Pituitary gland
c) Adrenal gland
d) Salivary gland
(iv)
Enzyme pepsin secreted in ............... shows highest activity at an
optimum pH
...........
a) stomach; 2
b) buccal cavity; 2
c) duodenum; 2
d) duodenum; 9.5
(v) A
tissue made up of immature, young, living cells showing ability to
divide is called ...................
a)
Parenchyma tissue
b)
Collenchyma tissue
c)
Meristematic tissue
d)
Sclerenchyma tissue
(vi) In potato and brinjal, leaves are
arranged in ………………………… .
a) alternate phyllotaxy
b) opposite decussate
phyllotaxy
c) whorled phyllotaxy
d) opposite superposed
phyllotaxy
(vii) A cell that lacks chloroplast does
not .....................
a) evolve carbon dioxide
b) liberate oxygen
c) require water
d) utilize carbohydrates
(viii) Respiratory quotient for proteins
is ..........
a) 0.7
b) 0.9
c) 1
d) 1.7
(ix) Find the odd one out.
a)
Salivary amylase
b) Pepsinogen
c) Mucus
d) Pancreatic
amylase
to relax.
It remains in a state of contraction called ………………..
a) Summation
b) Tetanus
c) Muscular dystrophy
d) Rigor mortis
Q.
2. Answer the following questions: (08)
(i) Here collections of preserved plant
and animal specimens are kept.
Identify the place.
(ii) Why do Dicots show secondary growth
while Monocot’s don’t?
(iii) What surrounds the stomatal pore?
(iv) Why species name americana is
given to cockroach?
(v) What is the role of Rubisco in
photosynthesis?
(vi) How much is the net gain of ATP
during formation of Acetyl-Co-A
from Pyruvate?
(vii) Complete the analogy:
Kwashiorkor = Oedema of lower legs and face.
Marasmus
= .....................
(viii) Sprain is more painful than fracture. Why?
SECTION – B
Attempt
Any Eight of the following questions: (16)
Q. 3. Does reproduction can be considered as all inclusive property of life?
Explain with examples.
Q.
4. Enlist the different criteria for
classification of secondary metabolites.
Q.
5. Match column ‘A’ with column ‘B’ and rewrite
your answer.
|
Column ‘A’ |
Column ‘B’ |
|
1.
M – phase |
a.
2-5 hours |
|
2.
G1 – phase |
b.
1-3 hours |
|
3.
S – phase |
c.
8 hours or more |
|
4.
G2 – phase |
d.
6-8 hours |
Q.
6. What is the difference between mitosis and
meiosis?
Q.
7. a. Draw a labelled diagram of a tissue having
uneven thickening in their
cell walls.
b. Write at least one function of it.
Q. 8. What is syngenesious condition and synandrous condition?
Give an example of each.
Q.
9. Define parthenocarpy. Give two examples of
such fruits.
Q.
10. Draw a labeled diagram of transverse section
of proventriculus of
cockroach.
Q.
11. a. Name the term used for leaf anatomy in C4
plants.
b. Which is the first stable product
of CO2 fixation in C4 plants?
Q.
12. Draw a neat, labelled diagram showing histology
of the gastrointestinal
tract.
Q. 13. Why is a kidney called retroperitoneal? How it is advantageous to
be
retroperitoneal?
Q.
14. All locomotions are movements but all
movements are not locomotion.
Justify.
SECTION – C
Attempt Any Eight of the following questions: (24)
Q. 15. Explain types of algae considering the following points.
a. Cell wall.
b. Accessory photosynthetic
pigments.
Q.
16. Prepare a tree diagram to show classification
of following animals having
jaws.
Scoliodon, Labeo rohita, Rana, Naja naja,
Passer and
Rattus.
Q.
17. Enlist the postulates of cell theory.
Q.
18. Match column ‘A’ with column ‘B’ and rewrite
your answer.
|
Column ‘A’ |
Column ‘B’ |
|
1.
Squamous epithelium |
a.
Nose |
|
2.
Cuboidal epithelium |
b.
Trachea |
|
3.
Columnar epithelium |
c.
Blood vessels |
|
4.
Ciliated epithelium |
d.
Ovary |
|
5.
Sensory epithelium |
e.
Gastric glands |
|
6.
Germinal epithelium |
f.
Salivary duct |
Q. 19. Explain the properties of catalytic proteins.
Q. 20. Observe the diagram and answer questions given below.
a. Identify the type of cell division.
b. Identify the phases.
c. Label ‘A’ and ‘B’.
Q.
21. Amit observed a permanent slide of dicot root
in laboratory and try to
understand the anatomy. His teacher
asks few questions to him. Can you
predict the answers of Amit for them?
a.
What is the innermost layer of the cortex called?
b.
What are Casparian strips?
c.
What are passage cells?
Q.
22. Identify the types and give one example of
each.
[Write scientific
name of plant]
a. A root swollen in the middle and
tapering towards both ends.
b. A root broad at its morphological
base and narrow down towards the
apex.
c. A base of root is highly swollen, almost
spherical in shape and
abruptly
narrows down towards its apex.
Q.
23. Match column ‘A’ with column ‘B’ and rewrite
your answer.
Column ‘A’ | Column ‘B’ |
1.
Oxaloacetate ------> Citrate | a.
Aconitase |
2.
Citrate ------>cis-Aconitate | b.
Fumarase |
3.
Isocitrate ------> Oxalosuccinate | c.
Succinate dehydrogenase |
4.
Succinyl-Co-A ------> Succinate | d.
Citrate synthetase |
5.
Succinate ------> Fumarate | e.
Succinyl-Co-A synthetase |
6.
Fumarate ------> Malate | f.
Isocitrate dehydrogenase |
Q. 24. a. What do you understand by phosphorylation?
b. Explain the types of
phosphorylation occurring during respiration in
plants.
Q. 25. a. Explain different types of renal calculi.
b. Enlist symptoms of having renal
calculi.
Q. 26. Amphibian tadpole can
afford to be ammonotelic. Justify your answer.
SECTION –D
Attempt
Any Three of the following questions: (12)
Q. 27. a. What is inflorescence?
b. Differentiate racemose and cymose
inflorescence using given
criteria
i.
Growth of peduncle
ii.
Arrangement of flower on peduncle
iii.
Order of opening of flower
Q.
28. a. Why body cavity of cockroach is called as
haemocoel?
b. How haemocoel is divided into
three sinuses?
c. Write about haemolymph of
cockroach.
Q.
29. a. Draw a graphic representation showing
photophosphorylation in
which PS
-II is not involved.
b. Distinguish between the two types
of photophosphorylation.
Q.
30. a. What is the dental formula of an adult human?
b. Explain why human dentition is
considered as thecodont, diphyodont
and
heterodont?
Q. 31. Justify the
structure of atlas and axis vertebrae with respect to their
position
and function.
***
