Description : Which plant hormone causes cell elongation? -Biology
Last Answer : answer:
Description : What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows? (a) Light stimulates plant cells on the lighted side to grow ... Green plants need light to perform photosynthesis. (d) Green plants seek light because they are phototropic.
Last Answer : (b) Auxin accumulates on the shaded side, stimulating greater cell elongation there
Description : For berry elongation in Grape ____ hormone is used a. IAA b. IBA c. GA3 d. ABB
Last Answer : c. GA3
Description : Abscisic acid causes (a) stomatal closure (b) stem elongation (c) leaf expansion (d) root elongation.
Last Answer : (a) stomatal closure
Description : Shear stress causes (a) Deformation (b)Elongation (c) Contraction (d) None
Last Answer : (d) None
Description : Chain elongation of fatty acids occurring in mammalian liver takes place in which of the following subcellular fractions of the cell? (A) Nucleus (B) Ribosomes (C) Lysosomes (D) Microsomes
Last Answer : Answer : D
Description : Colchicines bring about: (a) Polyploidy (b) Cell division (c) Cell elongation (d) Cell differentiation
Last Answer : Ans. ((a))
Description : Which of the following control the root initiation, cell elongation and apical dominance? (A)Auxins (B) ABA (C) Gibberellins (D) Ethylene
Last Answer : (D) Ethylene
Last Answer : (B) ABA
Description : Growth retardants are the substances which slow down : a. Cell division b. Cell elongation c. a & b d. None of the above
Last Answer : a & b
Description : Abscisic acid controls (a) cell division (b) leaf fall and dormancy (c) shoot elongation (d) cell elongation and wall formation.
Last Answer : b) leaf fall and dormancy
Description : ABA is involved in (a) shoot elongation (b) increased cell division (c) dormancy of seeds (d) root elongation.
Last Answer : (d) root elongation.
Description : Cell elongation in internodal regions of the green plants takes place due to (a) indole acetic acid (b) cytokinins (c) gibberellins (d) ethylene
Last Answer : (c) gibberellins
Description : Which one of the following pairs, is not correctly matched? (a) Gibberellic acid - Leaf fall (b) Cytokinin - Cell division (c) IAA - Cell wall elongation (d) Abscissic acid - Stomatal closure
Last Answer : (a) Gibberellic acid - Leaf fall
Description : Loading of phloem is related to (a) increase of sugar in phloem (b) elongation of phloem cell (c) separation of phloem parenchyma (d) strengthening of phloem fiber.
Last Answer : (a) increase of sugar in phloem
Description : What is the direct cause of cell death by diphtheria toxin? A- Formation of an ion channel in the cell membrane B- Inactivation of a translational elongation factor C- Induction of apoptosis D- None of the above
Last Answer : Inactivation of a translational elongation factor
Description : Plant hormone which causes dormancy in seeds and buds. -Biology
Description : Removal of apical bud results in (a) formation of new apical bud (b) elongation of main stem (c) death of plant (d) formation of lateral branching.
Last Answer : d) formation of lateral branching.
Description : Through their effects on plant growth regulators, what do the temperature and light control in the plants? (a) Apical dominance (b) Flowering (c) Closure of stomata (d) Fruit elongation
Last Answer : (b) Flowering
Description : Structural characteristics of the cells in the elongation zone of the root. -Biology
Description : Glucagon: a. is secreted by beta-islet cell of pancreas b. is a polypeptide hormone c. has a positive cardiac inotropic effect d. causes gluconeogenesis in the liver e. causes glycogenolysis in the liver
Last Answer : is a polypeptide hormone
Description : What plant hormone stimulates cell division? -Biology
Description : Which hormone causes overgrowth of plant stems ?
Last Answer : Gibberellin hormone causes overgrowth of plant stems
Description : Reappearance of nuclear membrane & nucleolus along with thining & elongation in chromosomes are diagnostic characters for the phase:-
Last Answer : Reappearance of nuclear membrane & nucleolus along with thining & elongation in chromosomes are diagnostic ... B. Metaphase C. Interphase D. Telophase
Description : Assuming that a planet goes round the sun in a circular orbit of radius `0.5AU` determine the angle of maximum elongation for the planet and its dista
Last Answer : Assuming that a planet goes round the sun in a circular orbit of radius `0.5AU` determine ... its distance from the earth when elongation is measured.
Description : Elongation of a peptide chain involves all the following except (A) mRNA (B) GTP (C) Formyl-Met-tRNA (D) Tu, TS and G factors
Last Answer : Answer : C
Description : Nonsense codons bring about (A) Amino acid activation (B) Initiation of protein synthesis (C) Termination of protein synthesis (D) Elongation of polypeptide chains
Description : Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides
Description : The formation of a peptide bond during the elongation step of protein synthesis results in the splitting of how many high energy bonds? (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : Answer : B
Description : Peptidyl transferase activity is located in (A) Elongation factor (B) A charged tRNA molecule (C) Ribosomal protein (D) A soluble cytosolic protein
Description : In eukaryotic cells (A) Formylated tRNA is important for initiation of translation (B) Cyclohexamide blocks elongation during translation (C) Cytosolic ribosomes are smaller than those found in prokaryotes (D) Erythromycin inhibits elongation during translation
Description : In the process of elongation of chain binding of amino acyl tRNA to the A site requires (A) A proper codon recognition (B) GTP (C) EF-II (D) GDP
Last Answer : Answer : A
Description : Epinephrine increases the concentration of free fatty acids in plasma by increasing (A) Extramitochondrial fatty acid synthesis (B) Mitochondrial fatty acid chain elongation (C) Microsomal fatty acid chain elongation (D) Lipolysis in adipose tissue
Description : All the following statements about acetyl CoA carboxylase are true except (A) It is required for de novo synthesis of fatty acids (B) It is required for mitochondrial elongation of fatty acids ( ... for microsomal elongation of fatty acids (D) Insulin converts its inactive form into its active form
Description : The major site for elongation of medium chain fatty acids is (A) Mitochondria (B) Cytosol (C) Microsomes (D) All of these
Description : The desaturation and chain elongation system of polyunsaturated fatty acid are enhanced by (A) Insulin (B) Glucagon (C) Epinephrine (D) Thyroxine
Description : Chain elongation of fatty acids in mammalian liver occurs in (A) Nucleus (B) Ribosomes (C) Lysosomes (D) Microsomes
Description : The desaturation and chain elongation system of polyunsaturated fatty acids are greatly diminished in the absence of (A) Insulin (B) Glycagon (C) Epinephrine (D) Thyroxine
Description : C22 and C24, fatty acids required for the synthesis of sphingolipids in brain are formed by (A) De novo synthesis (B) Microsomal chain elongation (C) Mitochondrial chain elongation (D) All of these
Description : Plants absorb most of the water needed by them through their (a) Embryonic zone (b) Growing point (c) Root hairs (d) Zone of elongation
Last Answer : Ans:(c)
Description : If percentage elongation of a material is more than 200%, it is classed as ?
Last Answer : Rubber.
Description : An elastomer is a polymer when its percentage elongation rate is ?
Last Answer : Greater than 100%.
Description : __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR. (A) Percent elongation (B) Resilience (C) Freezing point (D) Strength
Last Answer : (B) Resilience
Description : Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2 . Which of the following polymers has the maximum film elongation (of the order of 100%)? (A) Water impermeable cellophane (B) Polythene (C) Cellulose acetate (D) Teflon
Last Answer : (B) Polythene
Description : Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent. (A) 1-1000 (B) 1000-1500 (C) 1500-2000 (D) 2000-2500
Last Answer : (A) 1-1000
Description : Percentage elongation of a material is a measure of its (A) Ductility (B) Brittleness (C) Toughness (D) Malleability
Last Answer : (A) Ductility
Description : (A) Percentage elongation (B) Yield strength (C) Ultimate strength (D) Area under stress-strain diagram
Last Answer : (B) Yield strength
Description : Chain elongation of fatty acid is taking place in which site?
Last Answer : Microsomal elongation system is more active.
Description : .In protein synthesis, the polymerisation of amino acids involves three steps. Which one of the following is not involved in the polymerisation of protein ? (a) Termination (b) Initiation (c) Elongation (d) Transcription
Last Answer : (a) Termination