Statement I: During transcription, RNA polymerase binds to the promoter region of DNA. Statement II: — NEET Chemistry Past Papers Chemistry Question

Question

Statement I: During transcription, RNA polymerase binds to the promoter region of DNA. Statement II: The promoter is located towards the 3′ end of the coding strand. (A) Both Statement I and Statement II are correct (B) Both Statement I and Statement II are incorrect (C) Statement I is correct but Statement II is incorrect (D) Statement I is incorrect but Statement II is correct 100. Match the following: Column-I Column-II A. Lagging strand (i) Continuous synthesis B. Leading strand (ii) Discontinuous DNA segments C. Okazaki fragments (iii) Initiates DNA synthesis D. Primer (iv) Synthesised discontinuously (1) A-(iv), B-(i), C-(ii), D-(iii) (2) A-(i), B-(iv), C-(iii), D-(ii) (3) A-(ii), B-(i), C-(iv), D-(iii) (4) A-(iv), B-(ii), C-(i), D-(iii) 101. If a heterozygous individual AaBb is self- crossed, what fraction of progeny will show double recessive phenotype (aabb)? (1) 1/4 (2) 1/8 (3) 1/16 (4) 1/2 102. Which of the following statements are correct regarding DNA replication? A. DNA polymerase adds nucleotides only in 5′ → 3′ direction. B. Replication occurs in both directions from origin. C. DNA polymerase can initiate synthesis without primer. D. Deoxyribonucleoside triphosphates act as substrates. (1) A, B and D only (2) A and C only (3) B, C and D only (4) All of the above ALPHA ACHIEVER & LEADER POWER PLUS COURSE PHASE- 1,2 & 1,2 & 1 9610WMD802296250022 103. Which of the following statements are correct regarding Human Genome Project? A. Human genome has about 3 × 10⁹ base pairs. B. Less than 2% genome codes for proteins. C. All gene functions are known. D. Chromosome Y has fewer genes than chromosome 1. (1) A, B and D only (2) A and C only (3) B, C and D only (4) All of the above 104. Which of the following statements are correct regarding Mendelian inheritance? A. Law of segregation is based on separation of alleles during gamete formation. B. Law of independent assortment applies to unlinked genes. C. Linked genes always assort independently. D. Test cross helps determine genotype. (1) A, B and D only (2) A and C only (3) B, C and D only (4) All of the above 105. Ecology at the level of organism tries to understand how different organisms are adapted to their environment in terms of not only survival but also reproduction. Thus referred as :- (1) synecology (2) Physiological ecology (3) behavioural ecology (4) developmental ecology 106. Father of ecology in India, Mr. Ramdeo Mishra laid the foundations for :- (1) Understanding of tropical communities and their succession. (2) Environmental responses of plant populations and productivity (3) Nutrient cycling in tropical forest and grassland ecosystems (4) All of these 107. Assertion (A): Competition always occurs for limited resources. Reason (R): Competition is a beneficial interaction (1) Both (A) and (R) are true and (R) is the correct explanation of (A) (2) Both (A) and (R) are true and (R) is not the correct explanation of (A) (3) Only assertion is correct (4) Both assertion and reason are incorrect 108. Which of the following is wrong statement ? (a) Tropical latitudes have remained relatively undisturbed for millions of years and thus, had a long evolutionary time for species diversification. (b) More solar energy available in the tropics, which contributes to higher productivity. (c) For very larger areas like the entire continents you will find that the slope of the line to be less steeper. (d) Communities with more species, generally tend to be more stable than those with less species. (1) only a (2) only b (3) only c (4) only d ALPHA ACHIEVER & LEADER POWER PLUS COURSE PHASE- 1,2 & 1,2 & 1 9610WMD802296250022 109. The four pyramids (A, B, C and D) given below represent four different type of ecological pyramids, which one of these is correctly identified in the options given, along with its correct ecosystem and type of pyramid:- Type of pyramid Ecosystem (1) A Pyramid of number Tree ecosystem (2) B Pyramid of biomass Grassland (3) C Pyramid of Energy Grassland Ecosystem (4) D Pyramid of biomass Pond Ecosystem 110. Which of the following is an example of artifical ecosystem ? (1) Crop land ecosystem (2) Tree ecosystem (3) Grass land ecosystem (4) desert ecosystem 111. Which of the following scientist observed that within a region, species richness increased with increasing explored area, but only up to a limit? (1) Alexander von Humboldt (2) Robert May (3) Edward Wilson (4) Paul Ehrlich 112. Assertion : A stable community should not show too much variation in productivity from year to year. Reason : Increased diversity in community contribute to higher productivity. (1) Both assertion and reason are true and the reason is a correct explanation of Assertion. (2) Both assertion and reason are true but the reason is not the correct explanation of Assertion. (3) Assertion is true but reason is false. (4) Both assertion and reason are false. 113. In a floral formula, the symbol G with a horizontal line below it indicates a tricarpellary, syncarpous, superior ovary. Identify the plant which follows this formula and also possesses epiphyllous stamens. (1) Colchicum autumnale (2) Solanum lycopersicum (3) Indigofera tinctoria (4) Petunia hybrida 3 ALPHA ACHIEVER & LEADER POWER PLUS COURSE PHASE- 1,2 & 1,2 & 1 9610WMD802296250022 114. Which of the following is a correct anatomical- morphological correlation regarding the "offset" in aquatic plants like Eichhornia? (1) It is a underground modification of the root for storage. (2) It is a lateral branch with short internodes where each node bears a rosette of leaves and a tuft of roots. (3) It is a modified leaf that performs the function of a stem. (4) It is a specialized vertical stem found in xerophytic plants. 115. Identify the number of INCORRECT statements regarding the seed structure of monocotyledons: (i) The aleurone layer is a proteinaceous layer that separates the embryo from the endosperm. (ii) The scutellum is the large, shield-shaped cotyledon situated towards the lateral side of the embryonal axis. (iii) The plumule is enclosed in a sheath called coleorhiza. (iv) Most monocot seeds are non-endospermic, with Orchids being a notable exception. (1) One (2) Two (3) Three (4) Four 116. Assertion (A): In the roots of dicotyledonous plants, the innermost layer of the cortex, the endodermis, is termed a "starch sheath." Reason (R): The endodermis in dicot roots is characterized by cells rich in starch grains, which provide energy for the active transport of ions. (1) Both A and R are true and R is the correct explanation of A. (2) Both A and R are true but R is not the correct explanation (3) A is false but R is true. (4) Both A and R are false. 117. During secondary growth in a dicot stem, the amount of secondary xylem produced is significantly higher than secondary phloem. This is primarily because: (1) The vascular cambium is more active on the inner side than on the outer side. (2) The primary phloem is crushed, whereas primary xylem remains intact. (3) The phellogen only produces cells towards the outside (4) The plants require more water than food as they age. 118. In the chemiosmotic hypothesis, the proton gradient is established across the thylakoid membrane. Which of the following does not contribute to the high concentration of protons in the lumen? (1) Photolysis of water on the inner side of the membrane. (2) Transportation of protons from the stroma to the lumen by the Cytochrome b complex. (3) Removal of protons from the stroma by the reduction of NADP to NADPH + H . (4) Movement of protons through the F channel into the lumen. 119. Statement I: RuBisCO is the most abundant enzyme in the world and exhibits both carboxylase and oxygenase activity Statement II: In C plants, the bundle sheath cells lack PS II activity, which prevents the internal evolution of oxygen. (1) Both Statement I and Statement II are correct (2) Both Statement I and Statement II are incorrect (3) Statement I is correct but Statement II is incorrect. (4) Statement I is incorrect, Statement II is correct. 6f + + 0 4 ALPHA ACHIEVER & LEADER POWER PLUS COURSE PHASE- 1,2 & 1,2 & 1 9610WMD802296250022 120. Calculate the total number of ATP and NADPH required to convert 3 molecules of CO into molecules of glucose in the Calvin cycle. (1) 9 ATP and 6 NADPH (2) 18 ATP and 12 NADPH (3) 3 ATP and 2 NADPH (4) 6 ATP and 6 NADPH 121. In the link reaction and the TCA cycle, identify the number of times NAD+ is reduced to NADH + H per molecule of glucose. (1) 4 (2) 6 (3) 8 (4) 10 122. When one molecule of Glucose is completely oxidized, how many ATP are generated specifically by the Electron Transport System (ETS) from the FADH molecules produced? (1) 2 ATP (2) 4 ATP (3) 6 ATP (4) 3 ATP 123. Identify the molecule that acts as the "Common Intermediate" or "Gateway" between the breakdown of fats, carbohydrates, and proteins in aerobic respiration: (1) Pyruvic acid (2) Acetyl CoA (3) Oxaloacetic acid (4) Glyceraldehyde-3-phosphate 124. In the ETS, Cytochrome 'c' is a mobile electron carrier. Which of the following is true regarding its location and function? (1) It is an integral protein of the inner membrane and transfers electrons from Complex I to II. (2) It is a peripheral protein on the outer surface of the inner membrane and transfers electrons from Complex III to IV. (3) It is found in the mitochondrial matrix and carries protons. (4) It is a part of Complex V and facilitates ATP synthesis. 125. "Heterophylly" seen in plants like Larkspur and Coriander is a form of plasticity where the leaf shape varies according to: (1) The environment (Water vs Air) (2) The phase of life (Juvenile vs Mature) (3) The intensity of light (4) The availability of nitrogen 126. Polymerase chain reaction (PCR) amplifies DNA following the equation. (1) N (2) 2 (3) 2n + 1 (4) 2N