KENDRIYA VIDYALAYA SANGATHAN [AGRA REGION] SESSION ENDING EXAMINATION 2017 SUBJECT : BIOLOGY CLASS-XI (SOLVED PAPER)

Time: 3 Hours

Max. Marks: 90

General Instructions:

1. Answers to questions carrying 1 mark may be answered in one word to one sentence.
2. Answers to questions carrying 3 marks may be answered in about 50-75 words.
3. Answer to questions carrying 4 marks may be answered in about 150 words.
4. Answers to questions carrying 6 marks may be answered in about 200 words.
5. Attempt all parts of a question together.

What is the nature of the cell wall? 1

1. Name the substance that fixes the brown algae to the substrate. 1
2. Name the site of synthesis of glycoproteins and glycolipids in a cell. 1
3. How many types of amino acids found to occur in proteins? 1
4. What is the value of water potential of pure water? 1
5. Bring out the differences between chlorophyceae and phaeophyceae. 2
6. Give the location of hepatic caecae in a cockroach. What is their function? 2
7. What are kinetochores? What is their function? 2
8. 'Omnis cellula-e-cellula'. Who gave this statement and what does it mean? 2

OR Describe the role of haemoglobin in the transport of respiratory gases. 2

Write differences between arithmetic and geometric growth rate. 2

1. Represent diagrammatically the apoplastic and symplastic pathways of water transport in plants. 3
2. What is meant by flux? Describe its two kinds.
3. Represent systematically the process of ATP synthesis through chemiosmosis in chloroplast. 3
4. Give the structural formula of (a) adenine (b) adenosine (c) adenylic acid

Draw a well labeled diagram of mitochondria. 3

1. Where does mitosis take place in plants and animals? What is its significance in multicellular organisms? 3
2. Represent diagrammatically a pinnately compound leaf and a palmately compound leaf. Name one example of

each. 3

1. What is periderm? How does periderm formation takes place in dicot stem? 3

Draw a well labeled diagram of alimentary canal of a cockroach. 3

3 Who proposed the five kingdom classification? Name the five kingdoms.

OR

How are the animals of Arthropoda different from those of Mollusca? 3

1. What is exophthalmic goitre? Mention any four symptoms of this disorder. 3
2. Write short notes on hind brain. 3

Leena and Rita are final year BSc. students. Suddenly their classmate Arun's mother needed blood transfusion. She is B positive. Leena and Rita made all efforts to find suitable blood donor from their college to help Arun.

1. What blood group/groups can be transfused by Arun's mother.
2. Name the blood group known as universal donor.
3. Name the blood group referred to as universal acceptor.
4. What values are shown by Leena and Rita? 4
5. Where does non cyclic photophosphorylation take place? Describe this process with the help of its schematic representation. Why is this process called so? 5

OR Where does glycolysis occur in cell? Describe the sequence of reactions in it. Mention the end product. 5

1. Suggest five measures that can be proposed at global level for the prevention and control of diabetes and its complications. 5
2. Mention the schemes implemented by government of India to tackle malnutrition and health problems in children. 5

SOLUTIONS

1. The plant cell wall is a complex matrix of linked polysaccharides such as cellulose and pectin, forming a thick semi-permeable rigid barrier outside the plasma membrane.

1

1. Algin

1

1. Golgi Apparatus

20 1 1

1. Zero

6.

1. No. Phaeophyceae Chlorophyceae
2. Marine forms. Chiefly fresh water in nature.
3. Unicellular forms do not exist. Unicellular species are more.
4. Thylakoids occur in groups of three. Stacked in groups of 2-20.
5. Chlorophyll 'a' and 'c' present. Chlorophyll 'a' and 'b' is present.
6. Fucoxanthin is present. Fucoxanthin is absent.
7. Reserve food is laminarin. Reserve food is starch.

<math>(Any two) 1 \times 2 = 2</math>

1. Hepatic or gastric caecae are 6-8 narrow and hollow blind tubules called is present at the junction of foregut and mid gut. The hepatic caecae are similar to vertebrate liver, secretes digestive juices and help in the digestion. 1+1=2

1. The kinetochore is a protein structure on chromatids where the spindle fibers attach during cell division to pull sister chromatids apart. Their proteins help to hold the sister chromatids together and also play a role in

chromosome editing. <math>1 + 1 = 2</math>