DAYAPURAM RESIDENTIAL SCHOOL
ANNUAL EXAMINATION-2014
BIOLOGY
CLASS: XI
TIME: 3 ½ HR
MARKS: 60+10(OTBA)
General instructions
i)
ii)
All questions are compulsory.
This question paper consists of four sections A, B, C and D. Section A contains
7questions of one mark each, Section B is of 8 questions of two marks each,
Section C is of 9 questions of three marks each and Section D is of 2 questions of
five marks each.
There is no overall choice. However, an internal choice has been provided in one
question of 2 marks, one question of 3 marks and all the three questions of 5
marks weightage. A student has to attempt only one of the alternatives in such
questions.
Wherever necessary, the diagrams drawn should be neat and properly labeled.
OTBA questions are attached with the main question paper,which consists of two
five mark questions
iii)
iv)
v)
Section A
1) Balanoglossus is an example for the phylum---------------------.
2) The organisms of the sub phylum ----------------have notochord in the tail of their larval stage
3)
4)
5)
6)
7)
only.
The thin layer of flattened epithelial cells with irregular boundaries is called --------------epithelium.
Adipose and areolar tissues are the examples of ------------connective tissue.
What is family
Write about the cell wall in Diatoms
Name CO2 acceptors in C4 plants
Section B
8) Name the following: a) the salivary glands present below the tongue. b) The duct
which collect bile from liver. c) The cells inside the stomach which secrete
pepsinogen.
d) Intestinal juice.
9) Briefly explain the transport of CO2 in the form bicarbonates.
10) Explain photorespiration
11) Briefly explain heterospory
Or
What is double fertilization?
12) Write about any two classes of enzyme with example
13) Explain arithmetic growth with graph
14) What are the different roles of Ethylene in plant growth?
15) Explain the following
a) Actinomorphy b) Epigynous flower
Section C
16) What are the following?
a) Purkinje fibres. b) Systemic circulation. c)
Atherosclerosis.
17) How are hypothalamus, JGA cells and heart regulate the function of kidney?
18) Write very short notes on the following: a) three types of joints b) red and white
muscle fibres. c) Myasthenia gravis and muscular dystrophy.
19) What is the mechanism behind hearing? Draw a neat labeled diagram of human
eye.
OR
Explain a) reflex action and reflex arc. b) Mechanism of vision.
Draw a neat labeled diagram of human eye.
20) Explain the following
a) Reductive amination b) Transamination
21) Explain Cohesion –Tension transpiration pull model of water transport
22) Give the structural details of any one of the semiautonomous cell organelle
23) Explain secondary thickening in Dicot stem
24) What is oxidative phosphorylation?
Section D
25) Explain the endocrine function of pancreas and gonads in human beings. Write a
note on hyper thyroidism.
OR
How do hormones act on target organs to make biochemical and physiological changes?
Write a note on the types of hormones.
26) Write a note on cell cycle
Or
What are the different steps of EMP Pathway (3).What are the significances of
Photolysis of water in light reaction (2)