Description : Tissues are constructed from many distinct cell types that perform different functions in response to signals from each other and the extracellular matrix. During tissue development and tissue regeneration, ... that stem cells undergo when they are required to generate a particular type of cell?
Last Answer : Asymmetric cell division. After asymmetric division, each of the two resulting daughter cells has a unique life course. For example, one daughter cell may differentiate into a specific cell type ( ... cell), whereas the other daughter cell may remain a stem cell with unlimited proliferative ability.
Description : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce.
Last Answer : Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce. A. ... Spermatogonia `rarr` Sperms D. Spermatogonia
Description : In grasses what happens in microspore mother cell for the formation of mature pollen grains? (a) One meiotic and two mitotic divisions (b) One meiotic and one mitotic divisions (c) One meiotic division (d) One mitotic division
Last Answer : (b) One meiotic and one mitotic divisions
Description : Benzene cannot undergo – (1) Substitution (2) Addition (3) Elimination (4) Oxidation
Last Answer : (3) Elimination Explanation: Benzene can not undergo Elimination reaction.
Description : Show that F cannot undergo Disproportionation reaction?
Last Answer : Ans. F is most electronegative element and cannot possess three oxidation states. Hence it cannot undergo disproportionation reactions.
Description : Benzene cannot undergo : (1) Substitution (2) Addition (3) Elimination (4) Oxidation
Last Answer : Elimination
Description : Which cells undergo cell divisionA. cells do not undergo cell divisionB. prokaryotic cells onlyC. cancer cells onlyD. both prokaryotic and eukaryotic cellsE. None of these answers are correct?
Last Answer : Both prokaryotic and eukaryotic
Description : According to which theory is the given statement correct ? Statement. B and T cells having receptors for self antigens, undergo programmed cell death
Last Answer : According to which theory is the given statement correct ? Statement. B and T cells having ... C. Wear and tear throry D. Immunological theory
Description : Competence refers to a bacterial cell's ability to a. Take Up DNA Fragments From The Environment. b. Be Infected By A Transducing Phage. c. Produce A Protein Product From An Engineered Gene. d. Undergo Conjugation With An F+ Cell.
Last Answer : a. Take Up DNA Fragments From The Environment.
Description : Which of the following statements is false regarding B cells? A- B cells can undergo class switching and produce a different antibody type B- B one marrow stem cells migrate to the thymus and ... D- B cells that recognize high concentrations of antigens (self) in the absence of other signals
Last Answer : B one marrow stem cells migrate to the thymus and develop into B cells
Description : Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells ... selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Last Answer : CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Description : So! Mature cells may be reprogrammed into stem cells. Does this put the stem cell controversy to rest?
Last Answer : It will still be political due to different facilities scrapping over the same funding?
Description : What biconcave cells in blood that lack nuclei when they are mature?
Last Answer : Need answer
Description : What will the cells in steps 4 mature to become?
Last Answer : Feel Free to Answer
Description : What are the three types of cells that enter G0 phase when they are mature?
Description : Red blood cells: a. measured 15 um in diameter b. do not contain mitochondria c. have a life span of 120 days in the circulation d. are released from the bone marrow as mature erythrocytes
Last Answer : do not contain mitochondria
Description : Name two cells of a mature pollen grain?
Last Answer : Ans: Vegetative cell and Generative cell
Description : Where do B cells mature? a. Bone marrow b. Spleen c. Lymph node d. Thymus
Last Answer : a. Bone marrow
Description : Where do T cells mature? a. Bone marrow b. Spleen c. Lymph node d. Thymus
Last Answer : d. Thymus
Description : The interference in thin films is because (a) The film reflects some light (b) The film is thin enough so that refracted ray is close to reflected ray (c) The reflected ray undergo path change of λ/2 (d) All of above
Last Answer : (d) All of above
Description : A sample of `._(19)^(40)K` contains invariably `._(18)^(40)Ar`. This is because `._(19)^(40)K` has tendency to undergo:
Last Answer : A sample of `._(19)^(40)K` contains invariably `._(18)^(40)Ar`. This is because `._(19)^( ... B. positronium decay C. `beta`-decays D. `gamma`-decay
Description : Genetic code is said to be degenerate because (A) It can undergo mutations (B) A large proportion of DNA is non-coding (C) One codon can code for more than one amino acids (D) More than one codons can code for the same amino acids
Last Answer : Answer : D
Description : Black cotton soil is unsuitable for foundations because its (A) Bearing capacity is low (B) Permeability is uncertain (C) Particles are cohesive (D) Property to undergo a volumetric change due to variation of moisture content
Last Answer : Answer: Option D
Description : RNA transcription is more complex in eukaryotes because it is first made as a primary RNA transcript that contains intron and exon sequences. What kind of modification must occur to produce a mature mRNA?
Last Answer : RNA splicing. Introns must be removed and exons are spliced together to form a mature RNA transcript.
Description : When a MO paid to a wrong person and the claimant urges for payment before recovery of the amount from the wrong perosn a) It cannot be done b) Claim can be admitted on getting on indemnity bond ... from the head of the division d) Payment can be made on proper sanction form the head of the circle
Last Answer : c) Payment can be made on proper sanction from the head of the division
Description : Which of the following statements about the federal system in India are true? I. The Constitution of India provides for a three-fold distribution of legislative powers between the Union and the State Government. II. Both the Union and ... III (2) II, III and IV (3) I, III and IV (4) I, II and IV
Last Answer : (3) I, III and IV
Description : .E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because (a) the lac operon is constitutively active in these cells ( ... coli cells do not utilise lactose (d) they cannot transport lactose from the medium into the cell.
Last Answer : (b) they cannot synthesise functional beta galactosidase
Description : Which type of jaundice in adults is the result of increased destruction of red blood cells? a) Hemolytic Hemolytic jaundice results because, although the liver is functioning normally, it cannot ... is the result of liver disease. d) Non-obstructive Non-obstructive jaundice occurs with hepatitis.
Last Answer : a) Hemolytic Hemolytic jaundice results because, although the liver is functioning normally, it cannot excrete the bilirubin as quickly as it is formed.
Description : Which are the cell organelles that participate in the cell division and in the formation of cillia and flagella of some eukaryotic cells ?
Last Answer : The organelles that participate in the cell division and in the formation of cilia and flagella of some eukaryotic cells are the centrioles. Some cells have cillia (paramecium, the bronchial ciliated ... are very important for cell division. Cell Structure Review - Image Diversity: centrioles
Description : Why after cell division new cells are called as daughter cells not son cells? -Biology
Last Answer : answer:
Description : Where is the division of generative cells ?
Last Answer : Gene cell division occurs in pollen grains.
Description : What type of cell division produces germ cells ?
Last Answer : In meiosis cell division, germ cells are produced.
Description : How many offspring cells are formed from three mother cells in mitosis division ?
Last Answer : In mitosis division, 3 offspring cells are formed from three mother cells.
Description : In humans, at the end of the first meiotic division, the male germ cells differentiate into the
Last Answer : In humans, at the end of the first meiotic division, the male germ cells ... Spermatozonia C. Primary spermatocytes D. Secondary spermatocytes
Description : Assertion : Meiosis is also known as reduction division. Reason : Meiosis reduces the number of chromosomes in daughter cells.
Last Answer : Assertion : Meiosis is also known as reduction division. Reason : Meiosis reduces the number of ... D. If both Assertion & Reason are false.
Description : What mode of cell division sperm cells to be formed in the haploid male bee?
Description : Why is it important that the cell's DNA was duplicated before cell division?
Last Answer : to have identical daughter cells
Description : What is the number of cells division in meiosis?
Last Answer : There are 2 cell divisions in meiosis.
Description : A cancer cell is characterized by (A) Uncontrolled cell division (B) Invasion of neighbouring cells (C) Spread to distant sites (D) All of these
Description : The generation time is a. The time required for the cell to divide b. The total division of the cell during its life time c. The total no.of cells formed d. None of these
Last Answer : Ans: C
Description : The process of the division of somatic cells of an organism is called (a) Mitosis (b) Meiosis (c) Cytokinesis (d) None of these
Last Answer : Ans:(a)
Description : In human body, the cell growth and differentiation are highly controlled and regulated, but in cancer cells. (a) there is breakdown of these regulatory mechanism leading to formation of benign and malignant ... is mutated and produced in less amount (d) DNA is mutated and produced in less amount
Description : Cancerous cells can easily be destroyed by radiations due to (a) rapid cell division (b) lack of nutrition (c) fast mutation (d) lack of oxygen
Last Answer : (a) rapid cell division
Description : Which one of the following statements about the particular entity is true ? (a) Centromere is found in animal cells, which produces aster during cell division. (b) The gene for producing insulin is ... cell. (c) Nucleosome is formed of nucleotides. (d) DNA consists of core of eight histones.
Last Answer : (b) The gene for producing insulin is present in every body cell.
Description : During cleavage, what is true about cells? (a) Nucleocytoplasmic ratio remains unchanged. (b) Size does not increase. (c) There is less consumption of oxygen. (d) The division is like meiosis.
Last Answer : b) Size does not increase.
Description : n humans, at the end of the first meiotic division, the male germ cells differentiate into the (a) spermatids (b) spermatogonia (c) primary spermatocytes (d) secondary spermatocytes.
Last Answer : (d) secondary spermatocytes.
Description : Megaspores are produced from the megaspore mother cells after (a) mitotic division (b) formation of thick wall (c) differentiation (d) meiotic division.
Last Answer : d) meiotic division.
Description : In majority of angiosperms, (a) egg has a filiform apparatus (b) there are numerous antipodal cells (c) reduction division occurs in the megaspore mother cells (d) a small central cell is present in that embryo sac.
Last Answer : (c) reduction division occurs in the megaspore mother cells
Description : A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics. (a) Cytokinesis Cell plate formed, mitochondria ... reforms. (d) Late anaphase Chromosomes move away from equatorial plate, Golgi complex not present.
Last Answer : (c) Telophase Nuclear envelope reforms,Golgi complex reforms.
Description : Cell theory includes all of the following except A.all organisms are composed of one or more cells B.the cell is the most primitive form of life C.the cell is the structural unit of life D.cells arise by division of preexisting cells
Last Answer : B.the cell is the most primitive form of life