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Cell Biology - Biology Questions asked by Filo students

Views: 5,692

A barrel shaped structure organised at interzonal region by remaining spindle fibers at the end of telophase isa. Tonoplast b. Phragmoplast c. Mitoplast d. Tyloses

Topic:

Cell biology

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Views: 5,749

A characteristic feature of meiosis is a. Two DNA replications and one division of cytoplasm b. A single DNA replication and three divisions of cytoplasm c. Two DNA replication cycles and two divisions of cytoplasm d. A single DNA replication and two divisions of cytoplasm

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Cell biology

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Views: 5,181

Arrange the following events of meiosis in correct sequence :
(a) Crossing over
(b) Synapsis
( c ) Terminalisation of chaismata
(d) Disappearance of nucleolusa. (B), (A), (C ), (D) b. (A), (B), (C ), (D) c. (B), (C ), (D), (A) d. (B), (A), (D), (C )

Topic:

Cell biology

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Views: 5,129

Assertion: DNA synthesis occurs in

G_{1}

G_{2}

periods of cell cycle.
Reason: During

G_{1}

G_{2}

phase the DNA contents become double. a. If both assertion Reason are True the Reason is a corrrect explanation of the Asserion. b. If both Assertion Reason are True but Reason is not correct explanation of the Assertion. c. If Assertion is Trie but the Reason is False. d. If both Assertion &&&& Reason are false

Topic:

Cell biology

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Views: 5,559

Assertion :- In animal cells DNA and centriole show synchronization in their biogenesis.
Reason:- Both DNA and centriole genesis are crucial events of cell cycle.a. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. b. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion c. If Assertion is True but the Reason is False d. If both Assertion & Reason are false.

Topic:

Cell biology

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Views: 5,569

Assertion : Interphase occupies 75-95% of the total generation time.
Reason: Interphase (I-phase) is the long non-dividing phase. a. If both assertion and reason are true and reason is the correct explantion of assertion b. If both assertion and reason are true but reason is not the correct explnantion of assertion. c. If assertion is true but reason is false. d. If both assertion and reason are false.

Topic:

Cell biology

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Views: 5,033

Assertion: Miosis takes place in pollen mother cells.
Reason: Each pollen mother cell produce 4 haploid pollen grains. a. If both assertion Reason are True the Reason is a corrrect explanation of the Asserion. b. If both Assertion Reason are True but Reason is not correct explanation of the Assertion. c. If Assertion is Trie but the Reason is False. d. If both Assertion &&&& Reason are false

Topic:

Cell biology

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Views: 5,414

Assertion: Synthesis of DNA takes place in the S. phase of interphase.
Reason: Every chromosme, during metaphase, has two chromatids. a. If both assertion Reason are True the Reason is a corrrect explanation of the Asserion. b. If both Assertion Reason are True but Reason is not correct explanation of the Assertion. c. If Assertion is Trie but the Reason is False. d. If both Assertion &&&& Reason are false

Topic:

Cell biology

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Views: 5,698

Cell-plate is formed of smaller units called .................

Topic:

Cell biology

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Question 10

Views: 5,807

Cells which are not dividing are likely to be at a.

G_{1}

G_{2}

G_{0}

Topic:

Cell biology

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Question 11

Views: 5,047

Chromosomes are first visible under light microscope duringa. Leptotene b. Zygotene c. Pachytene d. Diplotene

Topic:

Cell biology

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Question 12

Views: 5,877

Chromosomes are scattered in the cytoplasm duringa. Early metaphase b. Late metaphase c. Early anaphase d. Late anaphase

Topic:

Cell biology

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Question 13

Views: 5,114

Chromosomes of the bivalent are fused (Joined) by their chiasmata near the telomeric ends duringa. Pachytene b. Zygotene c. Metaphase-I d. Anaphase-I

Topic:

Cell biology

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Question 14

Views: 5,416

Condensation of chromosomes is completed and can be observed clearly under microscope duringa. Prophase b. Metaphase c. Anaphase d. Telophase

Topic:

Cell biology

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Question 15

Views: 5,782

Consider the given cell at metaphase-I stage undergoing normal meiosis.

Which of the following gametes will not be formed from this cell?a. b. c. d.

Topic:

Cell biology

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Question 16

Views: 5,642

Crossing over occurs betweena. Two bivalents b. Non-sister chromatids of a bivalent c. Sister chromatids of a bivalent d. Two nuclei

Topic:

Cell biology

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Question 17

Views: 5,274

Cytokinesis in an animal cell takes place by ___ method in ____ direction; while in a plant cell it occurs by _______method in ___ direction. a. (a) furrowing, centrifugal, cell plate, centripetal b. (b) furrowing, centripetal, cell plate, centrifugal c. (c) cell plate, centrifugal, furrowing, centripetal d. (d) cell plate, centripetal, furrowing, centrifugal

Topic:

Cell biology

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Question 18

Views: 5,884

Decision of cell division occurs at –a. Starting of

G_{1}

G_{1}

c. Initial stage of prophase d. End of telophase

Topic:

Cell biology

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Question 19

Views: 5,155

Diplotene stage of prophase-I is characterised by a. dissolution of synaptonemal complex b. separation of synapsed homologous chromosomes except at the site of crossovers c. formation of X-shaped structures called chiasmata d. all of these

Topic:

Cell biology

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Question 20

Views: 5,871

DNA/chromosome replication or chromatid formation takes place duringa.

G_{1}

G_{2}

-Phase c. S-phase d. Prophase

Topic:

Cell biology

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