Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.

Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of attachment of spindle fibres to the chromosome.
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Assertion :- Kinetochore is essential for cell division. Reason :- Kinetochores serve as the sites of ... D. If both Assertion & Reason are false.
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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.

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.

Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During Anaphse-I each chromosome is found in bivalent form

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.

At metaphase, chromosomes are attached to the spindle fibres by their (a) satellites (b) secondary constrictions (c) kinetochores (d) centromeres.

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

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.

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

What happens if all the chromosome kinetochores are not attached to spindle fibers? When this occurs, which checkpoint is not passed?

Description : What happens if all the chromosome kinetochores are not attached to spindle fibers? When this occurs, which checkpoint is not passed?

Last Answer : •If the cell does not receive the go-ahead signal, it will exit the cycle, not proceeding onto the S phase

Centrioles are present only in animals. In such a case how the spindle fibres are held in the cell division of plants? -Biology

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:

Part of Chromosome which joins with spindle fibres is -

Description : Part of Chromosome which joins with spindle fibres is -

Last Answer : Part of Chromosome which joins with spindle fibres is - A. Chromatid B. Chromonema C. Chromomere D. Centromere

Which of the following is not a characteristic feature during mitosis in somatic cells? (a) Chromosome movement (b) Synapsis (c) Spindle fibres (d) Disappearance of nucleolus

Description : Which of the following is not a characteristic feature during mitosis in somatic cells? (a) Chromosome movement (b) Synapsis (c) Spindle fibres (d) Disappearance of nucleolus

Last Answer : (b) Synapsis

During cell division, spindle fibers attach to which part of chromosome :-

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

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 separate. (b) Metaphase - Chromosomes moved to spindle equator, chromosomes made up of two sister chromatids. (c) Anaphase - Centromeres split and chromatids separate and start moving away. (d) Late prophase - Chromosomes move to spindle equator.

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.

Assertion:- Centrioles are essential for mintenance of confinuity of cells in animals. Reason:- Centrioles give rise to spindle apparatus durring divi

Description : Assertion:- Centrioles are essential for mintenance of confinuity of cells in animals. Reason:- Centrioles give rise to spindle apparatus durring divi

Last Answer : Assertion:- Centrioles are essential for mintenance of confinuity of cells in animals. Reason:- Centrioles ... . If both Assertion & Reason are false.

Spindle fibre unite with which structure of chromosomes? (a) Chromocentre (b) Chromomere (c) Kinetochore (d) Centriole

Description : Spindle fibre unite with which structure of chromosomes? (a) Chromocentre (b) Chromomere (c) Kinetochore (d) Centriole

Last Answer : c) Kinetochore

In animal cell xhich structure is thougth to produce the spindle fibres that help separate the sister chromatids during anaphase?

Description : In animal cell xhich structure is thougth to produce the spindle fibres that help separate the sister chromatids during anaphase?

Last Answer : What is the answer ?

Assertion :- In higher plants, the mitosis is termed as anastral mitosis. Reason : In higher plants, mitosis takes place without spindle fibers.

Description : Assertion :- In higher plants, the mitosis is termed as anastral mitosis. Reason : In higher plants, mitosis takes place without spindle fibers.

Last Answer : Assertion :- In higher plants, the mitosis is termed as anastral mitosis. Reason : In higher plants, ... . D. If both Assertion & Reason are false.

Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce

Description : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each chromosome. Reason:- Durring different stages of ce

Last Answer : Assertion:- A single human cell has approximately two meter long thread of DNA distributed in each ... D. If both Assertion & Reason are false.

Which of the following statement(s) is/are correct concerning cell junctions? a. The major occluding junction is the tight junction or zonula occludens b. Tight junctions are usually located near the basal pole of the cell c. Desmosomes are button-like points of attachment which serve to weld together adjacent cells d. Gap junctions are a type of cell junction specialized for cell communication

Description : Which of the following statement(s) is/are correct concerning cell junctions? a. The major occluding junction is the tight junction or zonula occludens b. Tight junctions are usually located near ... adjacent cells d. Gap junctions are a type of cell junction specialized for cell communication

Last Answer : Answer: a, c, d Cell junctions are classified as occluding, anchoring, and communicating. The major occluding junction is the tight junction or zonula occludens which connects ... gap junction which is specialized for communication. This junction mediates both electrical and chemical coupling

What are spindle fibres? -Biology

Description : What are spindle fibres? -Biology

Last Answer : Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during ... division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

What is the function of the spindle fibres? -Biology

Description : What is the function of the spindle fibres? -Biology

Last Answer : Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during ... division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

What organelles produce spindle fibres? -Biology

Description : What organelles produce spindle fibres? -Biology

Last Answer : Centrioles produce spindle fibers in animal cells. These spindle fibers are active during mitosis when the DNA has replicated and the chromosomes are pulled apart during anaphase. Plants cells do not have centrioles but they still undergo mitosis.

At metaphase, chromosmes are attached to the spindle fibres by their

Description : At metaphase, chromosmes are attached to the spindle fibres by their

Last Answer : At metaphase, chromosmes are attached to the spindle fibres by their A. Centromere B. Satellites C. Secondary cnstrictions D. Kinetochores

Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above

Description : Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above

Last Answer : all above

Synapsis occurs between (a) mRNA and ribosomes (b) spindle fibres and centromere (c) two homologous chromosomes (d) a male and a female gamete.

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

Microtubules are absent in (a) mitochondria (b) flagella (c) spindle fibres (d) centrioles.

Description : Microtubules are absent in (a) mitochondria (b) flagella (c) spindle fibres (d) centrioles.

Last Answer : (a) mitochondria

Microtubules are the constituents of (a) centrioles, spindle fibres and chromatin (b) centrosome, nucleosome and centrioles (c) cilia, flagella and peroxisomes (d) spindle fibres, centrioles and cilia.

Description : Microtubules are the constituents of (a) centrioles, spindle fibres and chromatin (b) centrosome, nucleosome and centrioles (c) cilia, flagella and peroxisomes (d) spindle fibres, centrioles and cilia.

Last Answer : (d) spindle fibres, centrioles and cilia

Characteristics of smooth muscle fibres are (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary (b) spindle-shaped, unbranched, unstriped, multinucleate and involuntary (c) cylindrical, unbranched, unstriped, multinucleate and involuntary (d) cylindrical, unbranched, striated, multinucleate and voluntary.

Description : Characteristics of smooth muscle fibres are (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary (b) spindle-shaped, unbranched, unstriped, multinucleate and involuntary (c ... , multinucleate and involuntary (d) cylindrical, unbranched, striated, multinucleate and voluntary.

Last Answer : (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary

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.

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.

Assertion :- Morphology of chromosomes is most studied during metaphase of cell division. Reason :- Complete disintegration of nuclear envelope marks

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.

Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ratio.

Description : Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ratio.

Last Answer : Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ... D. If both Assertion & Reason are false.

In partial dentures the guidelines “Guiding Planes” serve to: A. Aid in balancing occlusion B. Assure predictable clasp retention C. Form right angle with the occlusal plane D. Eliminate the necessity for precision attachment E. Eliminate the necessity for a posterior clasp

Description : In partial dentures the guidelines “Guiding Planes” serve to: A. Aid in balancing occlusion B. Assure predictable clasp retention C. Form right angle with the occlusal plane D. Eliminate the necessity for precision attachment E. Eliminate the necessity for a posterior clasp

Last Answer : B. Assure predictable clasp retention

How one division of the nucleus a new spindle forms around each group of chromosomes?

Description : How one division of the nucleus a new spindle forms around each group of chromosomes?

Last Answer : Need answer

At what stage of mitosis cell division does half of the chromosome move towards the North Pole and half towards the South Pole ?

Description : At what stage of mitosis cell division does half of the chromosome move towards the North Pole and half towards the South Pole ?

Last Answer : Answer : In the anaphase stage of mitosis cell division, half of the chromosomes move towards the North Pole and half towards the South Pole.

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

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

In which cell division chromosome num- ber is reduced to half?

Description : In which cell division chromosome num- ber is reduced to half?

Last Answer : Meiosis

Which cell division helps to maintain the chromosome number of a species?

Description : Which cell division helps to maintain the  chromosome number of a species?

Last Answer : Meiosis

When do microtubules attach to kinetochores? -Biology

Description : When do microtubules attach to kinetochores? -Biology

Last Answer : answer:

When do microtubules attach to kinetochores? -Biology

Description : When do microtubules attach to kinetochores? -Biology

Last Answer : answer:

Exoskeletons DO NOT provide: a) sites for muscle attachment b) support for the organism c) unlimited growth potential d) protection of the organism

Description : Exoskeletons DO NOT provide: a) sites for muscle attachment b) support for the organism c) unlimited growth potential d) protection of the organism

Last Answer : ANSWER: C -- UNLIMITED GROWTH POTENTIAL

Assertion `:-` In PCT all of the essential nutrient and 70-80 percent of electrolytes and water are reabsorbed. Reason `:-` PCT is lined by simple cub

Description : Assertion `:-` In PCT all of the essential nutrient and 70-80 percent of electrolytes and water are reabsorbed. Reason `:-` PCT is lined by simple cub

Last Answer : Assertion `:-` In PCT all of the essential nutrient and 70-80 percent of electrolytes and water are ... . D. If both Assertion & Reason are false.

Assertion `:` Deficiency of vitamin `B_(12)` and folic acid can cause anaemia. Reason `:-` Vitamin `B_(12)` and folic acid are essential for maturatio

Description : Assertion `:` Deficiency of vitamin `B_(12)` and folic acid can cause anaemia. Reason `:-` Vitamin `B_(12)` and folic acid are essential for maturatio

Last Answer : Assertion `:` Deficiency of vitamin `B_(12)` and folic acid can cause anaemia. Reason `:-` Vitamin ... False. D. If both Assertion & Reason are false.

Assertion `:` Vitamins are essential for healthyl life. Reason `:` Vitamins regulate metabolism

Description : Assertion `:` Vitamins are essential for healthyl life. Reason `:` Vitamins regulate metabolism

Last Answer : Assertion `:` Vitamins are essential for healthyl life. Reason `:` Vitamins regulate metabolism A. If ... D. If both Assertion & Reason are false.

Assertion :- Disappearance of nuclear membrane is generally essential for karyokinesis Reason :- Forward movement of chromosomes is dependent on spind

Description : Assertion :- Disappearance of nuclear membrane is generally essential for karyokinesis Reason :- Forward movement of chromosomes is dependent on spind

Last Answer : Assertion :- Disappearance of nuclear membrane is generally essential for karyokinesis Reason :- Forward ... If both Assertion & Reason are false.

Assertion : Meiosis is also known as reduction division. Reason : Meiosis reduces the number of chromosomes in daughter cells.

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.

How many of the following is observed in the interphase nucleus ? Chromatid, Nucleosome, Centriole, Nucleouls, Centromere, Kinetochore

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

Fetal sex can be determined by examining cells from the amniotic fluid by looking for (a) chiasmata (b) kinetochore (c) barr bodies (d) autosomes.

Description : Fetal sex can be determined by examining cells from the amniotic fluid by looking for (a) chiasmata (b) kinetochore (c) barr bodies (d) autosomes.

Last Answer : (c) barr bodies

The complex formed by a pair of synapsed homologous chromosomes is called (a) bivalent (b) axoneme (c) equatorial plate (d) kinetochore.

Description : The complex formed by a pair of synapsed homologous chromosomes is called (a) bivalent (b) axoneme (c) equatorial plate (d) kinetochore.

Last Answer : (a) bivalent

What is a kinetochore?

Description : What is a kinetochore?

Last Answer : •During prometaphase spindle microtubules appear and are kinetochores (somewhat track like) where sister chromatids travel along them to the centriole (astor, opposite pole) region. .

With regard to HLA class 1 antigen: a. they are expressed on all nucleated cells b. they are essential for viral antigen recognition by cytotoxic cells c. the genes for HLA class 1 molecules are located on chromosome 6 and 15 d. all above

Description : With regard to HLA class 1 antigen: a. they are expressed on all nucleated cells b. they are essential for viral antigen recognition by cytotoxic cells c. the genes for HLA class 1 molecules are located on chromosome 6 and 15 d. all above

Last Answer : all above

Plasmids a. Replicate with the bacterial chromosome. b. Contain essential growth information. c. May contain antibiotic resistance genes. d. Are as large as the bacterial chromosome.

Description : Plasmids a. Replicate with the bacterial chromosome. b. Contain essential growth information. c. May contain antibiotic resistance genes. d. Are as large as the bacterial chromosome.

Last Answer : c. May contain antibiotic resistance genes.

At what stage of mitosis division does the offspring chromosome form ?

Description : At what stage of mitosis division does the offspring chromosome form ?

Last Answer : In the anaphase stage of mitosis division, offspring chromosomes are formed.

Assertion :- Meiosis-1 is most significant phenomenon so that consistancy of reduction in coromosome so that consistancy of chromosome can be maintain

Description : Assertion :- Meiosis-1 is most significant phenomenon so that consistancy of reduction in coromosome so that consistancy of chromosome can be maintain

Last Answer : Assertion :- Meiosis-1 is most significant phenomenon so that consistancy of reduction in coromosome so ... D. If both Assertion & Reason are false.