Botany
- Match List - I with List - II.List - I | List - II(a) Lenticels | (i) Phellogen(b) Cork cambium | (ii) Suberin deposition(c) Secondary cortex | (iii) Exchange of gases(d) Cork | (iv) PhellodermChoose the correct answer from the options given below. Answer: 2. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii) Match the structures with their roles: Lenticels allow exchange of gases: (a)-(iii). Cork... 1
- Gemmae are present in : Answer: 4. Some Liverworts Gemmae are small green multicellular buds that form in gemma cups on the thallus. They are a means of asexual rep... 1
- Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival ? Answer: 1. Resource partitioning When two species compete for the same resource, they may evolve ways to share it. This is resource partitio... 1
- Amensalism can be represented as : Answer: 1. Species A ( - ) ; Species B (0) Amensalism is an interaction in which one species is harmed and the other is unaffected. So it is... 1
- In the equation GPP-R=NPPR represents : Answer: 4. Respiration losses Net primary productivity is gross primary productivity minus the energy used by plants in respiration. So NPP... 1
- DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as : Answer: 2. Bright orange bands Ethidium bromide intercalates between DNA bases. Under UV light, the stained DNA fragments in an agarose gel... 1
- The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called : Answer: 3. Punnett square The diagram used to show gametes of the parents, the zygotes, and the F1 and F2 genotypes is the Punnett square, d... 1
- Match List - I with List - II.List - I | List - II(a) Cells with active cell division capacity | (i) Vascular tissues(b) Tissue having all cells similar in structure and function | (ii) Meristematic tissue(c) Tissue having different types of cells |… Answer: 1. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) Match by definition: Actively dividing cells: meristematic tissue, (a)-(ii). All cells ali... 1
- Identify the basic amino acid from the following. Answer: 3. Lysine Lysine has an extra amino group in its side chain, so it is a basic amino acid (like arginine and histidine). Glutamic aci... 1
- Which one of the following is the most abundant protein in the animals ? Answer: 2. Collagen Collagen is the most abundant protein in animals (and RuBisCO is the most abundant protein in the whole biosphere). 1
- Dissolution of the synaptonemal complex occurs during : Answer: 3. Diplotene The synaptonemal complex forms in zygotene, is complete in pachytene and dissolves in diplotene, when homologues separa... 1
- Snow-blindness in Antarctic region is due to : Answer: 2. Inflammation of cornea due to high dose of UV-B radiation Snow-blindness is inflammation of the cornea caused by a high dose of U... 1
- Experimental verification of the chromosomal theory of inheritance was done by : Answer: 4. Morgan Sutton and Boveri proposed the chromosomal theory of inheritance. Its experimental verification was done by Thomas Hunt Mo... 1
- Which of the following statements is correct ? Answer: 1. Adenine pairs with thymine through two H-bonds. In DNA, adenine pairs with thymine by two hydrogen bonds, and guanine pairs with... 1
- The number of substrate level phosphorylations in one turn of citric acid cycle is : Answer: 2. One In one turn of the citric acid cycle, one substrate level phosphorylation occurs: succinyl-CoA to succinate, forming GTP (whi... 1
- The body of the ovule is fused within the funicle at : Answer: 1. Hilum The ovule is attached to the funicle (stalk) at the hilum, where the body of the ovule fuses with the funicle. The micropyl... 1
- Match the following columns and select the correct option.Column - I | Column - II(a) Clostridium butylicum | (i) Cyclosporin-A(b) Trichoderma polysporum | (ii) Butyric Acid(c) Monascus purpureus | (iii) Citric Acid(d) Aspergillus niger | (iv) Blood… Answer: 2. (a) (ii), (b) (i), (c) (iv), (d) (iii) Match each microbe with its product. Clostridium butylicum produces butyric acid, so (a) -... 1
- Match the following with respect to meiosis :(a) Zygotene (i) Terminalization(b) Pachytene (ii) Chiasmata(c) Diplotene (iii) Crossing over(d) Diakinesis (iv) SynapsisSelect the correct option from the following : Answer: 2. (a) (iv), (b) (iii), (c) (ii), (d) (i) Link each meiotic prophase I sub-stage to its main event. Zygotene: pairing of homologous... 1
- Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G_0). This process occurs at the end of : Answer: 2. G ₁ phase Cells leave the cell cycle to enter the G0 (quiescent) stage at the end of G1 phase, before the S phase begins. They re... 1
- Which of the following is correct about viroids ? Answer: 2. They have free RNA without protein coat. Viroids are free RNA molecules without a protein coat, and are smaller than viruses. The... 1
- Floridean starch has structure similar to : Answer: 2. Amylopectin and glycogen Floridean starch, the food reserve of red algae, is structurally like amylopectin and glycogen. All thre... 1
- Which of the following pairs is of unicellular algae ? Answer: 4. Chlorella and Spirulina Chlorella and Spirulina are unicellular and are used as single-cell protein. Laminaria, Sargassum, Gelidi... 1
- Strobili or cones are found in : Answer: 4. Equisetum Strobili (cones) are found in Equisetum, a pteridophyte with sporophylls in cones. Salvinia and Pteris have sori or spo... 1
- Montreal protocol was signed in 1987 for control of : Answer: 2. Emission of ozone depleting substances The Montreal Protocol (1987) was an international treaty to control emission of ozone depl... 1