AHSEC| CLASS 11| BIOLOGY| QUESTION PAPER - 2024| H.S.1ST YEAR
2024
BIOLOGY
Full
Marks: 70
Pass
Marks: 21
Time:
3 hours
The
figures in the margin indicate full marks for the questions
Use
separate Answer-scripts for Part-I (Botany) and Part-II (Zoology)
PART-I
(Botany)
(Marks: 35)
1. Write the answers of the following briefly: 1x5=5
(a) Define species.
(b) Name one famous botanical garden
of India.
(c) What are lichens?
(d) What is cell theory?
(e) What is plasmolysis?
2.
Write short answers of the following: 2x5=10
(a) Write the four characteristics of
fungi.
(b) Write the characteristics of
bacterial cell.
(c) Mention the two functions of
calyx.
(d) Name the various parts of a
flower.
(e) What are micronutrients?
3.
Write about the various modification of leaf. 3
4.
Describe the structure and function of Golgi body. 3
5.
Draw and describe the structure of monocotyledon seed. 4
6.
Distinguish between the following (any two): 3x2=6
(a) Corolla and Calyx
(b) Xylem and Phloem
(c) Diffusion and Osmosis.
7. Write
short notes on the following (any two): 2x2=4
(a) Nucleus
(b) Plant growth regulators
(c) Gibberellin
PART-II
(Zoology)
(Marks: 35)
1.
Fill in the blanks (any five: 1x5=5
(a) ADH is secreted by ______.
(b) The average cell cycle span for a
mammalian cell is ________.
(c) The bony fish have ________pairs
of gills.
(d) Biomolecules are called
________metabolites.
(e) Non-protein part of enzyme is
called ________.
(f) ________is known as pacemaker of
heart.
2.
Give very short answers of the following (any four): 1x4=4
(a) What is dendrite?
(b) Define cell cycle.
(c) What are ureotelic animals?
(d) How is CO2 carried in the blood?
(e) What are protein-splitting
enzymes?
3.
Write the differences between the following (any two): 2x2=4
(a) Axon and Dendrite
(b) Proteolytic enzyme and Lipolytic
enzyme
(c) Columnar epithelium and Cuboidal
epithelium
(d) Nucleoside and Nucleotide
4.
Answer the following in brief (any three): 2x3=6
(a) Write the characteristics of
cardiac muscle.
(b) Write about cytoskeleton.
(c) Write about bilateral body
symmetry.
(d) Mention few biological
significances of proteins.
(e) Write four general characteristics
of arthropods.
5. Write
short notes on the following (any two): 3x2=6
(a) Oxygen-haemoglobin dissociation
curve
(b) Coenzyme
(c) Cell envelop
(d) Reflex action
(e) Significance of meiosis
6.
Describe the digestive system of human with diagram. 4+1=5
Or
Describe the factors affecting the
enzyme activity. 5
7.
What is excretion? Describe the functions of kidney tubules. 1+4=5
Or
What is chemical coordination? What are
the hormones secreted by pituitary gland? 1+4=5
***
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