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VENKATESWAR ENGLISH MEDIUM SCHOOL UNIT IV, BHUBANESWAR SCREENING TEST- (2023-24) STANDARD - X Time : 2hrs Subject - BIOLOGY (F.M -80) The question paper is divided into two sections Section Ais compulsory carrying 40 marks and from Section B answer any 4 carrying 40 marks Section A Q1)Multiple choice (15) 1) The chromosomes are duplicated in (a) Gl phase (b) S phase (c) G2 phase (d) M phase 2)The point where two sister chromatids cross over is called (a) Chromatid (b) Centromere (c) Chaismata (d) Kinetochore 3) An organism that has two different alleles of particular gene (a) Dominant (b) Heterozygous (c) Homozygous (d) Recessive 4) The phenotype of an organism is (a) Combination of alleles (b) Genetic expression (c) Pedigree (d) Observable features 5)Genes are present on (a) Cell wall (b)Chloroplast (c) Chromosomes (d) Centromere 6)Marine fish when placed in tap water bursts due to (a) Endosmosis (b) Exomosis (c) Diffusion (d) Plasmolysis )The artery that supplies blood to all parts of the body. (a) Pulmonary artery (b) Aorta (c) Pulmonary vien (d) Superior vena cava. 8) Pacemaker of the heart (a) SAN (b) SNA (c) AVN (d )ANA 9) The rate of transpiration is inversely proportional to (a) Temperature (b) Sunlight (c) Humidity (d) Pressure 10)When guard cells are turgid the stomata must be (a) Closed (b) Dead (c) Open Page 1 (d) Neither closed or open
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