NEET UG
- Given below are two statements :Statement I :Decomposition is a process in which the detritus is degraded into simpler substances by microbes.Statement II :Decomposition is faster if the detritus is rich in lignin and chitinIn the light of the above… Answer: 4. Statement I is correct but Statement II is incorrect Statement I: decomposition breaks detritus into simpler substances through m... 1
- Given below are two statements :Statement I :Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of InheritanceStatement II :Seven characters examined by Mendel in his experiment on pea plants were seed shape and colo… Answer: 2. Both Statement I and Statement II are correct Mendel studied seven pairs of contrasting traits in pea and proposed the laws of in... 1
- XO type of sex determination can be found in : Answer: 4. Grasshoppers XO sex determination (male has one X, female XX) is found in grasshoppers. Monkeys and Drosophila have XY males, and... 1
- The process of translation of mRNA to proteins begins as soon as : Answer: 2. The small subunit of ribosome encounters mRNA Translation begins when the small ribosomal subunit binds to the mRNA. Then the ini... 1
- Given below are two statements :Statement I :The primary CO_2 acceptor in C_4 plants is phosphoenolpyruvate and is found in the mesophyll cells.Statement II :Mesophyll cells of C_4 plants lack RuBisCo enzyme.In the light of the above statements, choo… Answer: 2. Both Statement I and Statement II are correct Statement I: in C₄ plants PEP, a three-carbon compound, is the primary CO₂ acceptor... 1
- Which one of the following plants does not show plasticity ? Answer: 1. Maize Plasticity means a plant shows different forms in response to environment or life phase, such as heterophylly. Cotton, cori... 1
- What amount of energy is released from glucose during lactic acid fermentation ? Answer: 1. Less than 7% Lactic acid fermentation releases less than 7% of the energy in glucose. Most energy stays in the lactic acid, since... 1
- What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid ? Answer: 4. Two In glycolysis, one glucose gives two pyruvic acid molecules. 4 ATP are made and 2 ATP are used in the preparatory steps, so t... 1
- Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis ? It involves : Answer: 3. Breakdown of electron gradient In chemiosmosis, a proton gradient (not an electron gradient) drives ATP synthesis. Protons move a... 1
- Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants : Answer: 4. Ethylene Ethylene promotes female flowers in cucumber, which increases fruit yield. Gibberellins in cucumber tend to promote male... 1
- The gaseous plant growth regulator is used in plants to : Answer: 3. promote root growth and roothair formation to increase the absorption surface The gaseous plant growth regulator is ethylene. It... 1
- Match List - I with List - II.List - I: (a) Manganese (b) Magnesium (c) Boron (d) IronList - II: (i) Activates the enzyme catalase (ii) Required for pollen germination (iii) Activates enzymes of respiration (iv) Functions in splitting of water during… Answer: 3. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i) Manganese functions in splitting of water in photosynthesis: (a)-(iv). Magnesium a... 1
- Identify the incorrect statement related to Pollination : Answer: 1. Moths and butterflies are the most dominant pollinating agents among insects Bees are the dominant insect pollinators, not moths... 1
- Given below are two statements :Statement I :Cleistogamous flowers are invariably autogamousStatement II :Cleistogamy is disadvantageous as there is no chance for cross pollinationIn the light of the above statements, choose the correct answer from t… Answer: 2. Both Statement I and Statement II are correct Statement I: cleistogamous flowers never open, so pollen falls on the stigma of the... 1
- Which one of the following plants shows vexillary aestivation and diadelphous stamens ? Answer: 3. Pisum sativum Vexillary (papilionaceous) aestivation with diadelphous stamens (9+1) is typical of the pea family, Fabaceae. Pisum... 1
- Identify the correct set of statements :(a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea(b) Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin(c) Stem is flattened and fleshy in Opuntia a… Answer: 4. (b), (c), (d) and (e) Only (a) In Citrus and Bougainvillea, axillary buds (stems) become thorns, not leaflets: false. (b) Axillar... 1
- In old trees the greater part of seco[...] dark brown and resistant to insect attack due [...](a) secretion of secondary metabolites and their deposition in the lumen of vessels.(b) deposition of organic compounds like tannins and resins in the centr… Answer: 2. (a) and (b) Only Heartwood is dark brown and resistant to insects and microbes because of chemical deposits in the central, old x... 1
- "Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which : Answer: 3. food is transported In the girdling experiment, a ring of bark (with phloem) is removed from a stem. Food accumulates above the r... 1
- Which one of the following statement is not true regarding gel electrophoresis technique ? Answer: 4. The presence of chromogenic substrate gives blue coloured DNA bands on the gel. In gel electrophoresis, DNA fragments are stained... 1
- Which one of the following never occurs during mitotic cell division ? Answer: 4. Pairing of homologous chromosomes Pairing of homologous chromosomes (synapsis) is a feature of meiosis I, never of mitosis. In mi... 1
- The appearance of recombination nodules on homologous chromosomes during meiosis characterizes : Answer: 4. Sites at which crossing over occurs Recombination nodules are protein-rich structures seen in the pachytene stage on the synapton... 1
- Hydrocolloid carrageen is obtained from : Answer: 4. Rhodophyceae only Carrageen is a hydrocolloid obtained from red algae (Rhodophyceae), such as Chondrus. Brown algae (Phaeophyceae... 1
- The device which can remove particulate matter present in the exhaust from a thermal power plant is : Answer: 4. Electrostatic Precipitator An electrostatic precipitator removes particulate matter from the exhaust of thermal power plants. Its... 1
- DNA polymorphism forms the basis of : Answer: 4. Both genetic mapping and DNA finger printing DNA polymorphism means variation in DNA sequence between individuals. It is the basi... 1