Description : What phase is when spindle fibers disappear new nucleus forms at each end of the cell?
Last Answer : Need answer
Description : In which phase of mitosis are chromosomes lined up on the equator of the spindle?
Description : Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.
Last Answer : (c) two homologous chromosomes
Description : Spindle fibre unite with which structure of chromosomes? (a) Chromocentre (b) Chromomere (c) Kinetochore (d) Centriole
Last Answer : c) Kinetochore
Description : At metaphase, chromosomes are attached to the spindle fibres by their (a) satellites (b) secondary constrictions (c) kinetochores (d) centromeres.
Last Answer : (c) kinetochores
Description : Select the correct option with respect to mitosis. (a) Chromatids separate but remain in the centre of the cell in anaphase. (b) Chromatids start moving towards opposite poles in telophase. (c ... . (d) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase.
Last Answer : (d) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase.
Description : A stage of mitosis is shown in the diagram. Which stage is it and what are its characteristics? (a) Metaphase - Spindle fibers attached to kinetochores, centromeres split and chromatids ... chromatids separate and start moving away. (d) Late prophase - Chromosomes move to spindle equator.
Last Answer : (b) Metaphase - Chromosomes moved to spindle equator, chromosomes made up of two sister chromatids.
Description : During the metaphase stage of mitosis, spindle fibres attach to chromosomes at (a) kinetochore (b) both centromere and kinetochore (c) centromere, kinetochore and areas adjoining centromere (d) centromere.
Last Answer : a) kinetochore
Description : As mitosis (pron: mie-TOE-sis) begins, the structure in the nucleus that disappears is the: a) spindle b) nucleolus (pron: new-klee-O-lus) c) chromatid (pron: KROME-a-tid) d) centromere (pron: SEN-tro-meer)
Last Answer : ANSWER: B -- NUCLEOLUS
Description : Centrioles are present only in animals. In such a case how the spindle fibres are held in the cell division of plants? -Biology
Last Answer : answer:
Description : Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.
Last Answer : Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of ... D. If both Assertion & Reason are false.
Description : During cell division, spindle fibers attach to which part of chromosome :-
Last Answer : During cell division, spindle fibers attach to which part of chromosome :- A. Primary constriction B. Sec. Constriction C. Chromomere D. Chromatid
Description : Which one of the following statements does NOT apply to bacterial reproduction? a. A fission ring apparatus is present. b. Septum formation occurs. c. A spindle apparatus is used. d. Symmetrical cell division occurs.
Last Answer : c. A spindle apparatus is used.
Description : A cell has 46 chromosomes at each pole in mitotic telophase. In tis division the number of chromatids at the metaphase was :-
Last Answer : A cell has 46 chromosomes at each pole in mitotic telophase. In tis division the number of chromatids at the metaphase was :- A. 23 B. 46 C. 92 D. 69
Description : What would happen to the number of chromosomes in each cell if copies of the chromosomes were not made before cell division?
Description : When paternal and maternal chromosomes change their materials with each other in cell division this event is called (a) bivalent-forming (b) dyad-forming (c) synapsis (d) crossing-over.
Last Answer : (d) crossing-over.
Description : Which of the following statement is correct about membrane cholesterol? (A) The hydroxyl group is located near the centre of the lipid layer (B) Most of the cholesterol is in the form ... forms a rigid, planar structure (D) The hydrocarbon chain of cholesterol projects into the extracellular fluid
Last Answer : C
Description : Which of the following statement is correct about membrane cholesterol? (A) The hydroxyl group is located near the centre of the lipid layer (B) Most of the cholesterol is in the form ... forms a rigid, planar Structure (D) The hydrocarbon chain of cholesterol projects into the extracellular fluid
Last Answer : (C) The steroid nucleus form forms a rigid, planar Structure
Last Answer : : The nucleus contains 2n chromosomes.
Description : $ Nucleosome is present on the chromosomes. ! A true nucleus is called Eukaryon.
Last Answer : $ Nucleosome is present on the chromosomes. ! A true nucleus is called Eukaryon. A. If both As and R are ... is wrong D. If both As and R are wrong.
Description : What is made up of DNA and is located on the chromosomes inside the nucleus?
Last Answer : genes
Description : What cells main job is to sort and package proteins and other substances in a plant cell. chloroplasts chromosomes nucleus Golgi Submit?
Last Answer : organelle
Description : Which phase do the chromosomes begin to twist and thicken the nucleus breaks apart and the chromosomes start to move toward the center of the cell?
Last Answer : prophase
Description : The fluid medium of the nucleus is called (a) Chromosomes (b) Nucleolus (c) Nucleoplasm (d) Chromatin
Last Answer : Ans:(c)
Description : Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells
Last Answer : d) Egg cell and antipodal cells
Description : .Experiments on Acetabularia by Hammerling proved the role of (a) cytoplasm in controlling differentiation (b) nucleus in heredity (c) chromosomes in heredity (d) nucleo-cytoplasmic ratio.
Last Answer : (b) nucleus in heredity
Description : Which of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm
Description : Which of the following is not true for prokaryotic organism? A- Nucleus is not bounded by nuclear membrane B- Chromosomes does not contain histones C- 80S ribosomes are distributed in cytoplasm D- Cell wall contains peptidoglycan as one of the major component
Last Answer : 80S ribosomes are distributed in cytoplasm
Description : Which of the following is not true for eukaryotic cells? A- Nucleus is bounded by nuclear membrane B- Chromosomes contain histones C- Chloroplasts and mitochondria contains 70S ribosomes D- Gas vacuoles are present
Last Answer : Gas vacuoles are present
Description : The chromosomes of a eukaryotic cell are located i the: a) mitochondria (pron: my-toe-kon-dria) b) nucleus c) ribosome d) endoplasma
Last Answer : ANSWER: B -- NUCLEUS
Description : At what stage of division does the number of chromosomes in the offspring cell become half of the number of chromosomes in the mother cell ?
Last Answer : The number of chromosomes in the offspring cell formed during the division of miosis-1 is half of the number of chromosomes in the mother cell.
Description : At what stage of mitosis division do the chromosomes become the shortest and thickest ?
Last Answer : In the metaphase stage of mitosis division, the chromosomes become the shortest and thickest.
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 : Assertion :- Morphology of chromosomes is most studied during metaphase of cell division. Reason :- Complete disintegration of nuclear envelope marks
Last Answer : Assertion :- Morphology of chromosomes is most studied during metaphase of cell division. Reason :- ... D. If both Assertion & Reason are false.
Description : In which stage of cell division, number of chromosomes best counted:-
Last Answer : In which stage of cell division, number of chromosomes best counted:- A. Prophase B. Metaphase C. Telophase D. Interphase
Description : Why does chromatin need to condense into chromosomes before cell division?
Description : In meios-I, the Centro mere undergoes: (a) Division between anaphase and Interphase (b) Division between prophase and metaphase (c) Division but the daughter chromosomes do not separate (d) No division
Last Answer : Ans. ((d))
Description : Mitosis is a type of cell division in which - (1) The chromosomes maintain their original number (2) The chromosome number is reduced to half (3) The Chromosome number is doubled (4) The chromosome number is reduced to one fourth
Last Answer : (3) The Chromosome number is doubled
Description : Name the scientist who discoved the chromosomes during cell division?
Last Answer : Strasburger
Description : Meiosis I is reductional division. Meiosis II is equational division due to (a) pairing of homologous chromosomes (b) crossing over (c) separation of chromatids (d) disjunction of homologous chromosomes.
Last Answer : (c) separation of chromatids
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 : Bacteria lack alternation of generation because there is (a) neither syngamy nor reduction division (b) distinct chromosomes are absent (c) no conjugation (d) no exchange of genetic materia
Last Answer : (a) neither syngamy nor reduction division
Description : Name the type of cell division in which the two resulting cells carry only half the original number of chromosomes.
Last Answer : ANSWER: MEIOSIS (pron: my-o-sis)
Description : During the final stage of cell division, the mitotic apparatus disappears, the chromosomes become attenuated, the centrioles duplicate and split, the nuclear membrane becomes reconstituted and the nucleolus reappears. This ... as: a) prophase (pron: prO-phase) b) metaphase c) anaphase d) telophase
Last Answer : ANSWER: D -- Telophase
Description : Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During Anaphse-I each chromosome is found in bivalent form
Last Answer : Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During ... . D. If both Assertion & Reason are false.
Description : The division of the nucleus is called? -Biology
Description : In what steps is the division of mitosis nucleus completed ?
Last Answer : The division of the mitosis nucleus is done in 5 steps.
Description : At what stage of cell division does the nucleus get bigger ?
Last Answer : The size of the nucleus increases during the prophase stage of cell division.
Last Answer : The division of the nucleus is called karyokinesis.
Description : During meiosis how cycles of nucleus division, DNA replication and division of centromere take place respectively :-
Last Answer : During meiosis how cycles of nucleus division, DNA replication and division of centromere take place respectively :- ... , Two, One D. Two, One, One