Description : At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm. ... (B) μ°+ R ln f (C) μ° + T ln f (D) μ° + R/T ln f
Last Answer : (A) μ° + RT ln f
Description : In a cell haploid chromosome number is 15. What number is found in Pollen grain, Zygote, Primary endosperm nucleus and Colchicine treated zygote.
Last Answer : Ans: 15 in pollen grain, 30 in zygote, 45 in Primary Endosperm nucleus and 60 in colchicine treated zygote.
Description : Sexual reproduction in Rhizopus occurs through: (a) Gametangial contact (b) Gametangial copulation (c) Planogametic copulation (d) Spermatogamy
Last Answer : Ans. ((b))
Description : According the Korper Kappe thory the upright T-shaped division is found in
Last Answer : According the Korper Kappe thory the upright T-shaped division is found in – Root cap region
Description : ______ is the cell relay protocol designed by the corresponding Forum and adopted by the ITU-T. A) X.25 B) Frame Relay C) ATM D) none of the above
Last Answer : ATM
Description : The species of Pinus, seeds of which are edible is/ chilgoza comes from: (a) P. roxburghii (b) P. gerardiand (c) P. monophylla (d) P. sylvestris
Description : Which of the following species of Pinus has trifoliar spur…. a) P. sylvestris b) P. merkusii c) P. gerardiana ' d) P. wallichiana
Last Answer : c) P. gerardiana '
Description : Which of the following species of Pinus is commonly known as chir pine ......... a) P. roxburghii b) P. wallichiana c) P. insularis d) P. gerardiana
Last Answer : a) P. roxburghii
Description : Which of the following species of Pinus is not found in India ............. a) Pinus merkusii b) P. gerardiana c) P. wallichiana d) P. maritima.
Last Answer : d) P. maritima.
Description : Water potential is equal to (a) Ψs + O.P (b) Ψs = T.P (c) Ψp + Ψw (d) Ψs + Ψp.
Last Answer : (d) Ψs + Ψp.
Description : Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure ... two (c) movement of water from cell A to B (d) movement of water from cell B to A.
Last Answer : (c) movement of water from cell A to B
Description : A mature ligule, having prominent basal portion, is called: (a) Glossopodium (b) Rhizhore (c) Trichome (d) None of these
Last Answer : Ans. ((a))
Description : Aerosols having carbon and fluorine compounds are chiefly released by: (a) Refineries (b) Automobiles (c) Industries (d) Jets 3. Coir of commerce is obtained from: (a) Endocarp of coconut (b) Mesocarp of coconut (c) Stem of jute (d) Leaves of coconut
Last Answer : Ans. ((d))
Description : Sporocarp is a reproductive structure of (a) Some algae (b) Some aquatic ferns (c) Angiosperms having spores (d) Bryophytes
Description : Decot root having more than six vascular bundles are found in (a) Pea (b) Sunflower (c) Ficus (d) Ranunculus
Last Answer : Ans. ((c))
Description : A plant having two types of haploid structures in its life cycle is known as: (a) Haplobiontic (b) Diplobiontic (c) Haplontic (d) Diplontic
Description : The living cells having thickening at the corners due to deposition of pectin are known as
Last Answer : The living cells having thickening at the corners due to deposition of pectin are known as – Collenchyma cells.
Description : Annual rings are more prominent in trees having
Last Answer : Annual rings are more prominent in trees having – Distinct Seasonal variations
Description : Name any two plants having sensitive stigmas
Last Answer : Ans: Mimulus, Martynia
Description : In the reaction `A+3BrArr2C`, initially 10 mole each of A and B were taken . If equilibrium pressure is 8 atm and`alpha " of "A=20%`then `K_(p)` will
Last Answer : In the reaction `A+3BrArr2C`, initially 10 mole each of A and B were taken . If equilibrium pressure is 8 atm and`alpha ... C. `(1)/(16)` D. `(1)/(2)`
Description : Why do cell walls absorb water ?
Last Answer : Plant cell walls absorb water. Because in the case of plants the cell walls are colloidal substances. And different types of colloidal substances exist in plants. Such as starch , gelatin , cellulose etc. These substances are able to absorb water due to their colloidal properties.
Description : In which process of plant protoplasm and cell wall absorbs water ?
Last Answer : The plant absorbs water in the process of protoplasm and cell wall adsorption.
Description : For the process : `H_(2)O (l, 1 atm, 373 K) rArr H_(2)O(g, 1 atm, 373 K)` [Given normal boiling point of water `= 373` K at 1 atm pressure.] The corre
Last Answer : For the process : `H_(2)O (l, 1 atm, 373 K) rArr H_(2)O(g, 1 atm, 373 K)` [Given normal boiling ... lt 0, DeltaU gt 0, Delta H = 0` D. none of these
Description : Which cell acts as a semi-permeable screen in a cell ?
Last Answer : Answer : The plasma membrane in a cell acts as a semipermeable membrane.
Description : What is the cell wall made of ?
Last Answer : The cell wall is made up of cellulose.
Description : Which of the following are true archaebacteria? (1) Extreme halophiles (2) Extreme thermophyles (3) Methanogens (4) Presence of peptidoglycan cell wall Ans. (a) 43; Which of the following are ... plants ? (1) Saintpaulia ionantha (2) Ceratozamia hildae (3) Punica granatum (4) Senecio hadrasomum
Description : Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) Phragmoplast comprises intrazonal microtubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
Description : Which of the following statement is correct? (1) The causal organism for foolish seedling disease is the source of gibberellin (2) Abscisic acid is a growth promoter (3) The ratio of auxin : cytokinin control cell differentiation (4) Bolting of cabbage can be induced by treatment with IAA
Description : Colchicines bring about: (a) Polyploidy (b) Cell division (c) Cell elongation (d) Cell differentiation
Description : The process by which the amount of DNA, RNA and protein can be known at a time is: (a) Cell fractionation (b) Autoradiography (c) Phase-contrast microscopy (d) Tissue culture
Description : Cell organelle covered by single unit membrane is: (a) Glyoxisome (b) Lysosome (c) Peroxisomes (d) All of these.
Description : The cell wall of both bacteria and cyanobactena contains: (a) Lipid (b) Pectin (c) Protein (d) muramic acid
Description : If a sporangium derived from a single cell is called (a) Leptosporangiate (b) Eusporangiate (c) Heterosporangiate (d) None of the above
Description : In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores
Description : In spite of several angiospermic features Gnetum is a gymnosperm because…. a) polyembryony is a common features b) prothallial cell is present in the male gametophyte c) seed is naked d) stem exhibit anomalous secondary growth
Last Answer : c) seed is naked
Description : Cell sap is found inside a. Protoplasm b. Cytoplasm c. Nucleoplasm d. Vacuole
Last Answer : d. Vacuole
Description : When the embryo develops from haploid egg cell without fertilization, the phenomenon is called as
Last Answer : When the embryo develops from haploid egg cell without fertilization, the phenomenon is called as – Haploid parthenogenesis
Description : When a diploid embryosac is formed from a megaspore mother cell without meiosis, it is called as
Last Answer : When a diploid embryosac is formed from a megaspore mother cell without meiosis, it is called as – Diplospory
Description : During microsporogenesis, successive type of cell division is found in
Last Answer : During microsporogenesis, successive type of cell division is found in – Monocots
Description : Egg cell without synergids is found in embryosac of
Last Answer : Egg cell without synergids is found in embryosac of – Plumbagella type
Description : Apical cell theory best explains the development in
Last Answer : Apical cell theory best explains the development in – Cryptogams
Description : Describe the cell organelle which is responsible for the synthesis of starch.
Last Answer : The cell organelle responsible for the formation of starch is Chloroplast. It was discovered by Sachs and named by Schimper. It is usually disc shaped or Biconvex or Oval or spherical. ... granum and the unstacked thylakoids that connect the adjacent grana are called as Stroma thylakoids.
Description : With the help of labeled diagram give an account of the cell organelle which is generally referred as Cell brain.
Last Answer : Ans: Nucleus is the controlling centre of the cell that consists of chromosomes. Structurally it has four parts known as Nuclear envelope, Nucleoplasm, Nucleolus and Chromatin. Nuclear ... chromosome at secondary constriction. It also disappears in Prophase and reappears in telophase.
Description : Give an account on suicidal bags of the cell.
Last Answer : Ans: These are Lysosomes. They have single unit membrane and formed from E.R. and Golgi complex. These were discovered by de Duve. They are rich in hydrolytic enzymes and play a role in digestion. ... lysosomes can destroy the contents of the same cell they are called as Suicidal bags of the cell.
Description : How do you identify a meristem cell and permanent cell under microscope.
Last Answer : Ans:
Description : If there are 16 chromosomes in the cell of an angiospermic plant, how many chromosomes are there in the perisperm and endosperm cell
Last Answer : Ans: 16 in perisperm as it is diploid and 24 in endosperm as it is triploid
Description : What is the significance of S-phase of cell cycle?
Last Answer : Ans: During S phase there is doubling of DNA due to semiconservative replication of DNA. The two chromatids of chromosomes are formed at the end of this stage.
Description : Name the cell organelle associated with photorespiration? Who discovered it?
Last Answer : Ans: Peroxisome, Rhodin
Description : What is the role of golgi complex in cell division?
Last Answer : Ans: During cell division the vesicles of Golgi are involved in the formation of cell plate at the equatorial region which eventually forms the middle lamellum. In this way Golgi plays a role in cytokinesis.
Description : In which stage of cell does crossing over occur? What is its role in the origin of species?
Last Answer : Ans: Pachytene of Meiosis. It brings about variations in the off spring. Continuation of these variations for several generations leads to origin of new species.