Botany
- 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 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
- The flowers are Zygomorphic in :(a) Mustard(b) Gulmohar(c) Cassia(d) Datura(e) ChillyChoose the correct answer from the options given below : Answer: 3. (b), (c) Only Zygomorphic flowers can be divided into two equal halves in only one vertical plane. Gulmohar and Cassia (family Fa... 1
- Which of the following is not observed during apoplastic pathway ? Answer: 4. The movement is aided by cytoplasmic streaming In the apoplastic pathway water moves only through cell walls and intercellular sp... 1
- Read the following statements about the vascular bundles :(a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.(b) Conjoint closed vascular bundles do not possess cambium(c) In open vascula… Answer: 3. (b), (c), (d) and (e) Only Check each statement against NCERT; the key says statement (a) does not hold, so the answer is (b), (c... 1
- Following are the statements with reference to ‘lipids’.(a) Lipids having only single bonds are called unsaturated fatty acids.(b) Lecithin is a phospholipid.(c) Trihydroxy propane is glycerol.(d) Palmitic acid has 20 carbon atoms including carboxyl… Answer: 3. (b) and (c) only (a) False: lipids with only single bonds are saturated. (b) True: lecithin is a phospholipid. (c) True: glycerol... 1
- Statement I :The codon ‘AUG’ codes for methionine and phenylalanine.Statement II :‘AAA’ and ‘AAG’ both codons code for the amino acid lysine.In the light of the above statements, choose the correct answer from the options given below. Answer: 4. Statement I is incorrect but Statement II is true Statement I is false: AUG codes only for methionine (it is also the start codon... 1
- Which of the following is not an objective of Biofortification in crops ? Answer: 2. Improve resistance to diseases Biofortification breeds crops for higher nutritional quality: more protein, vitamins, minerals and... 1
- Match List - I with List - II.List - I / List - II(a) Aspergillus niger (i) Acetic Acid(b) Acetobacter aceti (ii) Lactic Acid(c) Clostridium butylicum (iii) Citric Acid(d) Lactobacillus (iv) Butyric AcidChoose the correct answer from the options give… Answer: 1. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii) Aspergillus niger - citric acid (iii) Acetobacter aceti - acetic acid (i) Clostridium buty... 1