Assertion :- Zygotene is charactersed by formation of synaptonemal complex . Reason :- Synoptonemal complex helps in synapsis of non homologous chromo

Assertion :- Zygotene is charactersed by formation of synaptonemal complex . Reason :- Synoptonemal complex helps in synapsis of non homologous chromo
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Assertion :- Zygotene is charactersed by formation of synaptonemal complex . Reason :- Synoptonemal complex ... If both Assertion & Reason are false.
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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 separate but chromatids move towards opposite poles (v) Pachytene (a) A-(i), B-(ii), C-(v), D-(iv) (b) A-(ii), B-(iii), C-(iv), D-(v) (c) A-(ii), B-(i), C-(iii), D-(iv) (d) A-(ii), B-(iii), C-(v), D-(iv)

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)

Dissolution of the synaptonemal complex occurs during (a) pachytene (b) zygotene (c) diplotene (d) leptotene

Description : Dissolution of the synaptonemal complex occurs during (a) pachytene (b) zygotene (c) diplotene (d) leptotene

Last Answer : (c) diplotene

Match the following with respect to meiosis. (A) Zygotene (i) Terminalization (B) Pachytene (ii) Chiasmata (C) Diplotene (iii)Crossing over (D) Diakinesis (iv) Synapsis

Description : Match the following with respect to meiosis. (A) Zygotene (i) Terminalization (B) Pachytene (ii) Chiasmata (C) Diplotene (iii)Crossing over (D) Diakinesis (iv) Synapsis

Last Answer : (b) (iv) (iii) (ii) (i)

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-sister chromatids of homologous chromosomes at Pachytene stage of prophase I. (c) Non-sister chromatids of homologous chromosomes at Zygotene stage of prophase I. (d) Non-sister chromatids of non-homologous chromosomes at Pachytene stage of prophase 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.

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

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) Terminalisation of chiasmata C. Diakinesis (iii) Crossing-over takes place D. Zygotene (iv) Chromosomes align at equatorial plate (a) A-(iii), B-(iv), C-(ii), D-(i) (b) A-(i), B-(iv), C-(ii), D-(iii) (c) A-(ii), B-(iv), C-(iii), D-(i) (d) A-(iv), B-(iii), C-(ii), D-(i)

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)

The stage during which separation of the paired homologous chromosomes begins is (a) pachytene (b) diplotene (c) diakinesis (d) zygotene.

Description : The stage during which separation of the paired homologous chromosomes begins is (a) pachytene (b) diplotene (c) diakinesis (d) zygotene.

Last Answer : (b) diplotene

The stage during which separation of the paired homologous chromosomes begins is (1) Pachytene (2) Diplotene (3) Diakinesis (4) Zygotene

Description : The stage during which separation of the paired homologous chromosomes begins is (1) Pachytene (2) Diplotene (3) Diakinesis (4) Zygotene

Last Answer : (2) Diplotene

What is Synaptonemal complex? -Biology

Description : What is Synaptonemal complex? -Biology

Last Answer : answer:

What is the function of Synaptonemal complex? -Biology

Description : What is the function of Synaptonemal complex? -Biology

Last Answer : answer:

Assertion : Skeleton helps in blood cell formation. Reason : Blood flows through skeleton.

Description : Assertion : Skeleton helps in blood cell formation. Reason : Blood flows through skeleton.

Last Answer : Assertion : Skeleton helps in blood cell formation. Reason : Blood flows through skeleton. A. If both ... D. If both Assertion and Reason are false.

Assertion :- Homologous organs suggest same origin. Reason :- Organs which are simillar in function and dissimilar in internal morphology called as Ho

Description : Assertion :- Homologous organs suggest same origin. Reason :- Organs which are simillar in function and dissimilar in internal morphology called as Ho

Last Answer : Assertion :- Homologous organs suggest same origin. Reason :- Organs which are simillar in function and ... D. If both Assertion & Reason are false.

What is the functional unit of chromo- some?

Description : What is the functional unit of chromo- some?

Last Answer : Gene

Which of the following statements is not true of two genes that show 50% recombination frequency? (a) The gene show independent assortment. (b) If the genes are present on the same chromo- some, they undergo more than one cross-overs in every meiosis. (c) The genes may be on different chromosomes. (d) The genes are tightly linked.

Description : Which of the following statements is not true of two genes that show 50% recombination frequency? (a) The gene show independent assortment. (b) If the genes are present on the same chromo- some, they ... every meiosis. (c) The genes may be on different chromosomes. (d) The genes are tightly linked.

Last Answer : (b) If the genes are present on the same chromo- some, they undergo more than one cross-overs in every meiosis.

In which is chromo protein

Description : In which is chromo protein

Last Answer : Hemoglobin

Synaptonemal comples is a nucleoprotein structure. It is visible or found from-

Description : Synaptonemal comples is a nucleoprotein structure. It is visible or found from-

Last Answer : Synaptonemal comples is a nucleoprotein structure. It is visible or found from- A. ... zygotene through metaphase D. pachytene through diplotene

The complex formed by a pair of synapsed homologous chromosomes is called

Description : The complex formed by a pair of synapsed homologous chromosomes is called

Last Answer : The complex formed by a pair of synapsed homologous chromosomes is called A. Axoneme B. Equatorial plate C. Kinetochore D. Bivalent

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

Assertion `:-` Analysis of urine helps in clinical diagnosis of many metabolic disorder. ltbr. Reason `:-` Glycosuria is indicative of disabetes insip

Description : Assertion `:-` Analysis of urine helps in clinical diagnosis of many metabolic disorder. ltbr. Reason `:-` Glycosuria is indicative of disabetes insip

Last Answer : Assertion `:-` Analysis of urine helps in clinical diagnosis of many metabolic disorder. ltbr. Reason `: ... D. If both Assertion & Reason are false.

Assertion `:-` Larynx is a cartilaginous box which helps in sound production. Reason `:-` Epiglottis flap covers the glottis during swallowing and pre

Description : Assertion `:-` Larynx is a cartilaginous box which helps in sound production. Reason `:-` Epiglottis flap covers the glottis during swallowing and pre

Last Answer : Assertion `:-` Larynx is a cartilaginous box which helps in sound production. Reason `:-` Epiglottis ... . D. If both Assertion & Reason are false.

Assertion :- Bile helps in emulsification of fats. Reason `:-` During emulsification fat is brokendown into fatty acid and glycerol.

Description : Assertion :- Bile helps in emulsification of fats. Reason `:-` During emulsification fat is brokendown into fatty acid and glycerol.

Last Answer : Assertion :- Bile helps in emulsification of fats. Reason `:-` During emulsification fat is brokendown ... D. If both Assertion & Reason are false.

Assertion :- A reducing agent is a substance which accepts electron. Reason :- A substanc which helps in oxidaton is known as reducing agent.

Description : Assertion :- A reducing agent is a substance which accepts electron. Reason :- A substanc which helps in oxidaton is known as reducing agent.

Last Answer : Assertion :- A reducing agent is a substance which accepts electron. Reason :- A substanc which helps ... . D. If both Assertion & Reason are False.

Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endom

Description : Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endom

Last Answer : Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona ... . If both Assertion & Reason are False.

Assertion:- Cell wall is not only a structural component but also show dynamic role for cell. Reason:- Cell wall helps in cell to cell interaction and

Description : Assertion:- Cell wall is not only a structural component but also show dynamic role for cell. Reason:- Cell wall helps in cell to cell interaction and

Last Answer : Assertion:- Cell wall is not only a structural component but also show dynamic role for cell. Reason:- ... . D. If both Assertion & Reason are false.

Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank. A. Both A and R is true and R is the correct explanation of A B. Both A and R is true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true

Description : Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank. A. Both A and R is true and R is the correct ... is not a correct explanation of A C. A is true but R is false D. A is false but R is true

Last Answer : ANS: A

Assertion `:-` The JGA plays a complex regulaltory role. Reason `:-` An increase in glomerular blood flow `//` GFR can activate JG cells to release re

Description : Assertion `:-` The JGA plays a complex regulaltory role. Reason `:-` An increase in glomerular blood flow `//` GFR can activate JG cells to release re

Last Answer : Assertion `:-` The JGA plays a complex regulaltory role. Reason `:-` An increase in glomerular blood ... . D. If both Assertion & Reason are false.

Assertion: The enthalpy of formation of gaseous oxygen molecules at `298K` and under1 atm is zero. Reason: The entropy of formation of gaseous oxygen

Description : Assertion: The enthalpy of formation of gaseous oxygen molecules at `298K` and under1 atm is zero. Reason: The entropy of formation of gaseous oxygen

Last Answer : Assertion: The enthalpy of formation of gaseous oxygen molecules at `298K` and under1 atm is zero. ... D. If both Assertion & Reason are false.

Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .

Description : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .

Last Answer : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of ... . If both Assertion & Reason are False.

Assertion : In the human the temperature of scrotum is `2-2.5^(@)C` lesser then normal body temperature . Reason : Formation of sperm does not occur a

Description : Assertion : In the human the temperature of scrotum is `2-2.5^(@)C` lesser then normal body temperature . Reason : Formation of sperm does not occur a

Last Answer : Assertion : In the human the temperature of scrotum is `2-2.5^(@)C` lesser then normal body ... False . D. If both Assertion & Reason are False.

Assertion : Formation of sperm takes place in seminiferous tubules of testes . Reason : Seminiferous tubules lined with male germ cells and sertoli ce

Description : Assertion : Formation of sperm takes place in seminiferous tubules of testes . Reason : Seminiferous tubules lined with male germ cells and sertoli ce

Last Answer : Assertion : Formation of sperm takes place in seminiferous tubules of testes . Reason : Seminiferous ... . If both Assertion & Reason are False.

Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . Reason : Diploid nuclear status of organism is essen

Description : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . Reason : Diploid nuclear status of organism is essen

Last Answer : Assertion : The nucleus of sperm fuses with the nucleus of ovum , before the formation of ootid . ... . D. If both Assertion & Reason are False.

Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the age of fifty years . Reason : Human male having

Description : Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the age of fifty years . Reason : Human male having

Last Answer : Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the ... D. If both Assertion & Reason are False.

Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation is completed before 6 weeks of pregnancy .

Description : Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation is completed before 6 weeks of pregnancy .

Last Answer : Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation ... . If both Assertion & Reason are False.

Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked by completion of karyokinesis and cytokinesis as we

Description : Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked by completion of karyokinesis and cytokinesis as we

Last Answer : Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked ... . D. If both Assertion & Reason are false.

Assertion `(A): ` The emission of `alpha-` particles results in the formation of isodiapher of parent element. Reason `(R) : ` Isodiaphers have same i

Description : Assertion `(A): ` The emission of `alpha-` particles results in the formation of isodiapher of parent element. Reason `(R) : ` Isodiaphers have same i

Last Answer : Assertion `(A): ` The emission of `alpha-` particles results in the formation of isodiapher of parent element ... If both (A) and (R ) are incorrect.

What is synapsis? -Biology

Description : What is synapsis? -Biology

Last Answer : answer:

Arrange the following events of meiosis in the correct sequence - A. Terminalisation of chiasmata B. Crossing over C. Synapsis D. Disjunction of chrom

Description : Arrange the following events of meiosis in the correct sequence - A. Terminalisation of chiasmata B. Crossing over C. Synapsis D. Disjunction of chrom

Last Answer : Arrange the following events of meiosis in the correct sequence - A. Terminalisation of chiasmata ... ` C. `CtoBtoDtoEtoA` D. `CtoBtoEtoAtoD`

Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis ( c ) Terminalisation of chaismata (d) Disappearance of n

Description : Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis ( c ) Terminalisation of chaismata (d) Disappearance of n

Last Answer : Arrange the following events of meiosis in correct sequence : (a) Crossing over (b) Synapsis ( c ) Terminalisation of ... . (a), (b), ( c ), (d)

Synapsis occurs between :

Description : Synapsis occurs between :

Last Answer : Synapsis occurs between : A. Two homologous chromosomes B. A make and a female gamete C. m RNA and ribosomes D. Spindle fibres and centromere

When synapsis is complete all along the chromosomes, the cell is said to have entered a stage called

Description : When synapsis is complete all along the chromosomes, the cell is said to have entered a stage called

Last Answer : When synapsis is complete all along the chromosomes, the cell is said to have entered a stage ... . Zygotene B. Pachytene C. Diplotene D. Diakinesis

In meiosis the daughter cells are not similar to that of parent because of (a) Crossing over (b) Synapsis (c) Both (a) and (b) (d) None of these

Description : In meiosis the daughter cells are not similar to that of parent because of (a) Crossing over (b) Synapsis (c) Both (a) and (b) (d) None of these

Last Answer : Ans:(a)

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.

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.

Arrange the following events of meiosis in correct sequence (i) Crossing over (ii) Synapsis (iii)Terminalisation of chiasmata (iv) Disappearance of nucleolus (a) (i), (ii), (iii), (iv) (b) (ii), (iii), (iv), (i) (c) (ii), (i), (iv), (iii) (d) (ii), (i), (iii), (iv)

Description : Arrange the following events of meiosis in correct sequence (i) Crossing over (ii) Synapsis (iii)Terminalisation of chiasmata (iv) Disappearance of nucleolus (a) (i), (ii), (iii), (iv) (b) (ii), (iii), (iv), (i) (c) (ii), (i), (iv), (iii) (d) (ii), (i), (iii), (iv)

Last Answer : (d) (ii), (i), (iii), (iv)

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

Synapsis and crossing over of chromosomes occurs i which phases of meiosis? a) Interphase b) Prophase c) Meterphase d) Teleophase

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

Match the columns-I with column-II and select the correct answer :- `{:(" Column-I"," Column-II"),("(A)Pachytene","(i)Bouqute stage"),("(B)Zygotene","

Description : Match the columns-I with column-II and select the correct answer :- `{:(" Column-I"," Column-II"),("(A)Pachytene","(i)Bouqute stage"),("(B)Zygotene","

Last Answer : Match the columns-I with column-II and select the correct answer :- `{:(" Column-I"," Column-II"),("(A)Pachytene", ... D. A-ii, B-iii, C-iv, D-i, E-v

Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Path ene (4) Diplotene

Description : Crossing-over occurs during (1) Leptotene (2) Zygotene (3) Path ene (4) Diplotene

Last Answer : (3) Path ene Explanation: Chromosomal crossover (or crossing over) is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes. It is one of the ... recombination, which occurs during prophase I of meiosis (pachytene) during a process called synapsis.

Morphology of Chromosomes can be best studied at - (1) Interphase (2) Prophase (3) Metaphase (4) Zygotene

Description : Morphology of Chromosomes can be best studied at - (1) Interphase (2) Prophase (3) Metaphase (4) Zygotene

Last Answer : (3) Metaphase Explanation: The morphology of the chromosomes can be distinctly studied at metaphase stage of cell division because at this stage chromosomes are in highly condensed ... constriction (centromere), Secondary constriction (nucleolar organizer), satellite, telomere, and chromosmere.

Segregation of Mendelian factor (Aa) occurs during (a) diplotene (b) anaphase I (c) zygotene/pachytene (d) anaphase II.

Description : Segregation of Mendelian factor (Aa) occurs during (a) diplotene (b) anaphase I (c) zygotene/pachytene (d) anaphase II.

Last Answer : b) anaphase I