KENDRIYA VIDYALAYA SANGATHAN [GUWAHATI REGION] SESSION ENDING EXAMINATION 2016 SUBJECT : BIOLOGY CLASS-XI (SOLVED PAPER)

Time: 3 Hours 30 Min. OTBA

Max. Marks: 70

General Instructions:

The question paper comprises of five sections A, B, C, D, E & F.

All questions are compulsory.

There is no overall choice however; internal choice has been provided in one question of 2 marks, one question of 3 marks and all the questions of five marks category. Only one option in such question is to be attempted.

Questions 1 to 4 in Section A are very short questions of one mark each. These are to be answered in one sentence each.

Questions 5 to 9 in Section B are short questions of two marks each. These are to be answered in approximately 20-30 words each.

Questions 10 to 18 in Section C are questions of three marks each. These are to be answered in approximately 30-50 words each.

Question 19 in Section D is Value based question and is of 4 marks.

Questions 20 to 22 in Section E are questions of five marks each. These are to be answered in approximately 80-120 words each.

Questions 23 to 24 in section F is based on OTBA of 10 marks.

SECTION - A

What do you mean by epipetalous?

Name two types of parenchyma present in leaf. 1 1 1

1. What is Glycosidic Bond?

Mention two significance of Mitosis.

SECTION - B

1. Differentiate <math>G_1</math> and <math>G_2</math> phase of cell cycle.

Define the term isotonic solution. 2 2 2 2 2 What are uricotelic animals? Give two examples.

Write the floral formula for the family Fabaceae.

1. Differentiate between apoplast and symplast pathway.

OR

What is water potential? What is the relationship between water potential with Solute potential and Pressure potential?

SECTION - C

Draw the diagram of V.S of maize seed and label six parts.

RNA and DNA are the basic genetic materials of living beings. Write three points of difference between them.

1. In certain plants growing in temperate region suffer from photorespiratory loss. How do they overcome it? Mention the anatomical adaptation. Mention the first stable CO₂ fixation product and the enzyme responsible for

it. 3 3 What is non-symbiotic N₂ fixation? Give examples of some microorganism.

What is non-cyclic photophosphorylation? Describe the process. Why is the process referred to as non-cyclic? OR What is cyclic photophosphorylation? Describe the process using a flow diagram. Why is the process referred to as cyclic?

Draw a sketch of human ear and label various parts. 3

OR

Draw a labeled diagram of human eye and label various parts.

1. How many ATP are produced during cellular respiration during - Glycolysis, Oxidative decarboxylation and

Kreb's Cycle? What is the net production of ATP? Define Respiratory Quotient. 3 3 What is placentation? Mention the types. Describe any one with typical diagram.

3 Differentiate between

1. Early wood and late wood
2. Heart wood and sap wood

SECTION - D

In a class seminar Ashok described about the role, distribution and characteristics of vascular bundle in monocot and dicot plants. Arun was under impression that the vascular bundle distribution is same in both monocot and dicot. To explain, it Ashok showed the T.S. of monocot and dicot stem to Arun under microscope.

1. What character did Ashok demonstrate?
2. What is vascular bundle according to you?
3. What is the difference between the distribution of vascular bundle in monocot and dicot stem? 4

SECTION - E

1. Compare the characters of Chordates and Non-chordates. 5

OR Classify sub-phylum Vertebrata using flow diagram.

Draw a labelled diagram of Alimentary canal of cockroach.

What is the function of crop and gizzard in the digestive system of cockroach? 5 OR Draw a labelled diagram of male reproductive system of cockroach.

What is the function of testes in the reproductive system of cockroach?

Explain the process of urine formation in Human being. Explain briefly the various steps. 5 OR

1. Mention the function of the following in regulation of kidney function
2. ADH, (ii) ANF, (iii) Renin

1. How is the heart activity regulated in human body?

SECTION - F (OTBA)

Read the section after the Text material provided under OTBA

1. What is air pollution? Mention some primary and secondary air pollutants. Mention the effect of air pollution on health. 5
2. What is Pneumoconiosis? Mention its types. Write briefly how it can be prevented and controlled? 5

SOLUTIONS

SECTION - A

Epipetalous – When stamens are fused with petals, the condition is called epipetalous. Eg. Solanum, Petunia.

1. Palisade parenchyma
2. Spongy parenchyma

54 + 55

1. Glycosidic Bond - It is a bond formed during the condensation of monosaccharides for the formation of oligosaccharides and polysaccharides. Eg. Cellulose. 1
2. Two significances of Mitosis:

Mitosis is essential for growth and development of multicellular organisms.

1/2 + 1/2

Mitosis is the method of multiplication of unicellular organisms.

SECTION - B

1. Differentiation between G₁ and G₂ phase is as follows:

1. <math>G_1</math> <math>G_{\Sigma}</math> No.
2. This stage starts from the birth of the daughter This stage starts from the end of S-phase

cell and ends upto the time when the cell upto the beginning of M-phase.

begins to synthesise DNA.

1. RNA and proteins are synthesized. In G₂ phase synthesis of DNA stops. Formation of RNA and protein continue.

<math>1 + 1</math>