Description : .Centromere is required for (a) replication of DNA (b) chromosome segregation (c) poleward movement of chromosomes (d) cytoplasmic cleavage.
Last Answer : (c) poleward movement of chromosomes
Description : Assertion : Nucleocytoplasmic ratio decreases in cleavage . Reason : During cleavage , cytoplasmic synthesis is faster than DNA synthesis.
Last Answer : Assertion : Nucleocytoplasmic ratio decreases in cleavage . Reason : During cleavage , cytoplasmic synthesis ... If both Assertion & Reason are False.
Description : Which of the following options gives the correct sequence of events during mitosis ? (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation ... (d) Condensation → Nuclear membrane disassembly → Crossing over → Segregation → Telophase
Last Answer : (a) Condensation → Nuclear membrane disassembly → Arrangement at equator → Centromere division → Segregation → Telophase
Description : Select the correct option. Column I Column II A. Synapsis aligns (i) Anaphase II homologous chromosomes B. Synthesis of (ii) Zygotene RNA and protein C. Action of enzyme (iii)G2-phase recombinase D. Centromeres do (iv) Anaphase I not ... ), C-(iii), D-(iv) (d) A-(ii), B-(iii), C-(v), D-(iv)
Last Answer : (d) A-(ii), B-(iii), C-(v), D-(iv)
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 : The events shown below occur during different phases - A. Centromere splits, chromatids separate and move to opposite poles, chromatids are now called
Last Answer : The events shown below occur during different phases - A. Centromere splits, chromatids separate and move to opposite poles, ... "),(" C A D E B"):}`
Description : Meiosis II performs (a) separation of sex chromosomes (b) synthesis of DNA and centromere (c) separation of homologous chromosomes (d) separation of chromatids.
Last Answer : d) separation of chromatids.
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 : 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 : The chromosomes in which centromere is situated close to one end are (a) telocentric (b) sub-metacentric (c) metacentric (d) acrocentric
Last Answer : (d) acrocentric.
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 : In which type of cell divisions does crossing over of chromosomes takes place? -Do You Know?
Last Answer : answer:
Description : Down’s syndrome is due to (a) crossing over (b) linkage (c) sex-linked inheritance (d) non-disjunction of chromosomes.
Last Answer : (d) non-disjunction of chromosomes.
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 : 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 : Match the stages of meiosis in column I to their characteristic features in column II and select the correct option using the codes given below. Column I Column II A. Pachytene (i) Pairing of homologous chromosomes B. Metaphase I (ii) ... , C-(iii), D-(i) (d) A-(iv), B-(iii), C-(ii), D-(i)
Last Answer : (a) A-(iii), B-(iv), C-(ii), D-(i)
Description : Crossing over takes place between which chromatids and in which stage of the cell cycle ? (a) Non-sister chromatids of non-homologous chromosomes at Zygotene stage of prophase I. (b) Non- ... prophase I. (d) Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase I.
Last Answer : (b) Non-sister chromatids of homologous chromosomes at Pachytene stage of prophase I.
Description : In which type of cell divisions does crossing over of chromosomes takes place?
Last Answer : Meiosis
Description : Synapsis and crossing over of chromosomes occurs i which phases of meiosis? a) Interphase b) Prophase c) Meterphase d) Teleophase
Last Answer : ANSWER: B -- PROPHASE
Description : Is cytoplasmic movement the same as cyclosis? -Biology
Description : Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle? (a) Decondensation from chromosomes and reassembly of the nuclear lamina (b) ... and formation of the phragmoplast (d) Formation of the contractile ring and transcription from chromosomes
Last Answer : (c) Formation of the contractile ring and formation of the phragmoplast
Description : Recombination of virus genomes occurs A- by transduction B- by transcription C- simultaneous infection of a host cell by two viruses with homologous chromosomes D- by transformation
Last Answer : simultaneous infection of a host cell by two viruses with homologous chromosomes
Description : Why after crossing the Dihang gorge, the Himalayas take a sudden southward turn towards the eastern border of India? -Geography
Last Answer : The Assam Himalayas show a marked dominance of fluvial erosion due to heavy rainfall. The Himalayas take a sudden southward turn after the Dihang gorge and the hill ranges running in more or less north-south direction along India's border with Myanmar are collectively known as the Purvanchal.
Description : If a coenzyme is required in an enzyme reaction, the former usually has the function of (A) Acting as an acceptor for one of the cleavage products of the substrate (B) Enhancing the specificity ... C) Increasing the number of receptor sites of the apo enzyme (D) Activating the substrate ENZYMES 167
Last Answer : Answer : A
Description : The movement of a gene from one linkage group to another is called (a) translocation (b) crossing over (c) inversion (d) duplication
Last Answer : (c) inversion
Description : What is a Centromere? -Biology
Last Answer : Centromere, structure in a chromosome that holds together the two chromatids (the daughter strands of a replicated chromosome). The centromere is the point of attachment of the kinetochore, a ... chromosome. Thus, when the cell divides, both daughter cells have complete sets of chromosomes.
Description : What are the functions of the Centromere? -Biology
Last Answer : The primary function of the centromere is to provide the foundation for assembly of the kinetochore, which is a protein complex essential to proper chromosomal segregation during mitosis. In ... mitotic chromosomes, kinetochores appear as platelike structures composed of several layers (Figure 4).
Description : In which step is the centromere of chromosome divided into two parts ?
Last Answer : The centromere of the chromosome is divided into two parts in the anaphase phase.
Description : What is the difference between centromere and chromometer ?
Last Answer : Centromere 1. Undigested space is special in the colored chromosome. 2. Seen on all chromosomes. 3. Here the RNA is slightly coiled. 4. Each chromosome usually contains one. 5. Centromeres usually do ... more coiled. 4. Each chromosome contains a lot. 5. Each chromosome contains one or more genes.
Description : Centromere is also called
Last Answer : Centromere is also called A. Secondary constriction B. Chromomere C. Chromocentre D. Primary constriction
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
Description : Centromere is rquired for
Last Answer : Centromere is rquired for A. Movement of chromosomes towards poles B. Cytoplasmic cleavage C. Crossing over D. Transcription
Description : Division of centromere occurs in :-
Last Answer : Division of centromere occurs in :- A. Prophase B. Metaphase C. Anaphase D. Telophase
Description : In meiosis, the centromere divides during
Last Answer : In meiosis, the centromere divides during A. Interphase B. Anaphase - 1 C. Anaphase - II D. Metaphase - I
Description : How many of the following is observed in the interphase nucleus ? Chromatid, Nucleosome, Centriole, Nucleouls, Centromere, Kinetochore
Last Answer : How many of the following is observed in the interphase nucleus ? Chromatid, Nucleosome, Centriole, Nucleouls, ... . Three B. One C. Four D. Two
Description : A chromosome, in which the centromere is situated is situated close to its end so that one arm is very short and other vey long is
Last Answer : A chromosome, in which the centromere is situated is situated close to its end so that one ... B. Telocentric C. Sub-metacentric D. Metacentric
Description : Chromosome with centromere at one End :-
Last Answer : Chromosome with centromere at one End :- A. Metacentric B. Submetacentric C. Telocentric D. Acrocentric
Description : If the centromere is sub-median the two arms are unequal then the chromosome is called as
Last Answer : If the centromere is sub-median the two arms are unequal then the chromosome is called ... Metacentric B. Submetacentric C. Acrocentric D. Telocentric
Description : In which phases of mitosis are sister chromatids visible and attached to each other at the centromere?
Last Answer : Feel Free to Answer
Description : How the chromosome region where the centromere is located is called ?
Last Answer : How are chromosomes classified in relation to the position of their centromere? The chromosome region where the centromere is located is called primary constriction. In microscopic view ... constriction the chromosomes are classified as telocentric, acrocentric, submetacentric or metacentric.
Description : What is centromere?
Last Answer : The chromatids are held together by centromere.
Description : . The stage in which each centromere divides is called a. Prophase b. Metaphase c. anaphase d. telophase
Last Answer : anaphase
Description : An octamer of 4 histones complexed with DNA forms (a) endosome (b) nucleosome (c) mesosome (d) centromere.
Last Answer : (b) nucleosome
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 : Which of the following structures will not be common to mitotic cell of a higher plant? (a) Centriole (b) Spindle fibre (c) Cell plate (d) Centromere
Last Answer : (a) Centriole
Description : Spindle fibres attach on to (a) centromere of the chromosome (b) kinetosome of the chromosome (c) telomere of the chromosome (d) kinetochore of the chromosome.
Last Answer : (d) kinetochore of the chromosome.
Description : Which region of chromatin is transcriptionally silent? a. Nucleoid b. Centromere c. Euchromatin d. Heterochromatin
Last Answer : d. Heterochromatin
Description : A chromosome whose centromere lies at one end. (A) Sum-metacentric (B) Metacentric (C) Telocentric (D) Acrocentric
Last Answer : (C) Telocentric
Description : A chromosome with the centromere located very close to one end so that the shorter arm is very small is termed as (A) Telocentric (B) Sub-telocentric (C) Acrocentric (D) Both B and C
Last Answer : (D) Both B and C