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KENDRIYA VIDYALAYA MUMBAI REGION
SAMPLE PAPER 2022-23 ( SET –
2) CLASS XI
BIOLOGY
Maximum Marks: 70 Time: 3 hours General Instructions: (i) All questions are compulsory. (ii) The question paper has five sections and 33 questions. All questions are compulsory. Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks each; Section– C has 7 questions of 3 marks each; Section– D has 2 case-based questions of 4 marks each; and Section–E has 3 questions of 5 marks each. (iii) There is no overall choice. However, internal choices have been provided in some questions. A student has to attempt only one of the alternatives in such questions. (iv) Wherever necessary, neat and properly labeled diagrams should be drawn. SECTION – A 1 Antibiotics cure disease by (a) Competitive Inhibition (b)Fighting with the disease causing organism (c) Turning the pathogen out of the body (d)Removing the pain
2 Externally male Ascaris can be differentiated from female Ascaris by- (a) 5 pairs of postanal papillae (b) 50 pairs of papillae (c) Pineal setae (d)All of the above
3 Flowers are zygomorphic in: (a) mustard (b)gulmohur (c) ioruato (d)Datura
4 Which of the following represents the floral characters of Liliaceae? (a) Bisexual, zygomorphic, gamophyllous, inferior ovary, marginal placentation (b)Tetramerous, actinomorphic, polyphyllous, unilocular ovary, axile placentation (c) Unisexual, actinomorphic, trilocular, inferior ovary, axile placentation (d)Trimerous, actinomorphic, polyandrous, superior ovary, axile placentation
5 Casparian thickenings are found in the cells of (a) Endodermis of the root (b)Pericycle of the root (c) Endodermis of the stem (d)Pericycle of the stem
13 Assertion: Photosynthetically C4 plants are less efficient than C3 plants. Reason: The operation of C4 pathway requires the involvement of only of bundle-sheath cells.
14 Assertion: The ‘absorption spectrum’ of chlorophyll ‘a’ is determined in terms of the rate of production either per unit mass of green tissue or per unit weight of total chlorophyll. Reason: Chlorophyll ‘a’ is present in both the pigment system I & II.
15 Assertion: Abscission zone in leaves is formed across the petiole near its junction with the stem. Reason: In many compound leaves, each leaflet also forms an abscission zone.
16 Assertion: Plants usually bend towards the source of light. Reason: Shoot apex shows positive phototropism because of differential growth caused due to unequal distribution of auxin.
SECTION – B
17 Differentiate between RER and SER on the basis of a. structure, b. function OR Differentiate between mitochondria and chloroplast on the basis of a. structure, b. function 18 Match the correct pairs. Column I Column II
Family Tuberosum Kingdom Polymoniales Species Solanum Genus Plantae Solanaceae 19 Identify the type of floral part insertion in the given flowers A and B Give the the type of ovary these flower has
20 Aman gave amit a green twig and asked Aniket to identify it and tell whether it belongs to dicot or monocot. Which characteristics Aniket has to check to identify it
21 How could it affect a person’s CNS if he is attacked by a blow on the back of the neck?
SECTION – C
22 Observe the diagram and answer the questions a. What does A, B, C and D represent b. In which cell division it is found? c. Give its significance.
Describe C3 cycle with help of suitable diagram OR Describe Noncyclic photophosphorylation
24 fill appropriate terms in the spaces denoted by A, B C, D,E F,G, H (ANY SIX) OR differentiate between Gymnosperm and Pteridophytes
25 Identify the organism shown? which kingdom it belongs to. 3
Que 1. Which of the following nitrogen bases is not present in RNA? a) Thymine b) Adenine c) Guanine d) Cytosine Que 2. Each triplet of nucleotides is called a) Anticodon b) Codon c) mRNA d) tRNA Que 3. Each codon specifies a) 1 amino acid b) 2 amino acids c) 3 amino acids d) None of these Que 4. The amino acids are brought to- -by another type of RNA called —---- a) mRNA, mRNA b) tRNA , mRNA c) mRNA, tRNA d) tRNA , rRNA 30 ABO Grouping ABO grouping is based on the presence of absence of two surface antigens on the RBCs, viz. A and B. Antigens are chemicals which can induce immune response. The plasma also contains two natural antibodies. Antibodies are proteins produced in response to antigens. Importance of Blood Group: During blood transfusion, the donor blood needs to be carefully matched with the blood of a recipient. Transfusion of unmatched blood can lead to severe problems of clumping, i.e. destruction of RBC. Que 1. Which blood group is universal blood donor a) A b) B c) AB d) O
Blood Groups and Donor Compatibility Blood Groups Antigen on RBC Antibodies in Plasma Donor’s Group A A Anti-B A, O B B Anti-A B, O AB AB Nil AB, O O O Anti-A, B O
Que 2. Which blood group is universal recipient a. A b. B c. AB d. O Que 3. Blodd grouping is based on a. presence of antigen b. absence of antigen c. presence or absence of antigen on RBC d. none of the above Que 4. Which blood group can develop antibody- A a. A , AB b. B, O c. AB, O d. O, A SECTION – E 31 a. Observe the diagram and Specify what od A,B,C,D,E,F represent b. Where does it occur in a cell? Give its significance. OR a. Define Glycolysis> Explain it with the help of suitable diagram b. Differentiate between aerobic and anaerobic respiration
32 a. Enlist various hormones produced by master endocrine gland of an adult human. Explain role of any four hormones produced by it b. Give the names of two hormones produced by ovary and give their role OR a. Describe mechanism of urine formation. b. Differentiate between Ammonotelism and ureotelism
33 a. Identify the organism and its class b. Give any six identifying features of the class to which the belong to c. Give two more examples of this group OR a. Identify the organism which phylum it belongs to b. Give any six identifying features of the class to which the belong to c. Give two more examples of this group
