Cytokinesis

Question 1

What structure do plant cells form during cytokinesis?

Answer 1

Cell plate

The cell plate is formed as a structure to divide the two daughter cells.

Question 2

How do plant cells change shape during cytokinesis?

Answer 2

Do not change shape

Plant cells maintain their shape throughout the division process.

Question 3

What induces cell division in plant cells?

Answer 3

Cytokines

Cytokines are signaling molecules that play a role in cell division.

Question 4

What is absent in plant cells that is typically present in animal cells?

Answer 4

Centrosomes

Plant cells lack centrosomes, which are critical for organizing microtubules in animal cells.

Question 5

What type of spindle is formed in plant cells?

Answer 5

Anastral

Anastral spindles lack centrioles, which are present in animal cells.

Question 6

Is midbody formation identified in plant cell cytokinesis?

Answer 6

Not identified

Midbody formation is a characteristic not observed in plant cell division.

Question 7

Are microfilaments involved in plant cell division?

Answer 7

Not involved

Unlike animal cells, microfilaments do not play a role in plant cytokinesis.

Question 8

In what direction does the cell plate occur during cytokinesis in plant cells?

Answer 8

Centrifugally

The cell plate expands outward from the center towards the cell walls.

Question 9

Where does mitotic cell division occur in plants?

Answer 9

Meristems

Meristems are regions of growth in plants where cell division takes place.

Question 10

What structure do animal cells form during cytokinesis?

Answer 10

Cleavage furrow

The cleavage furrow is an indentation that helps in the division of animal cells.

Question 11

How do animal cells change shape during cytokinesis?

Answer 11

Become round

Animal cells round up as they undergo division.

Question 12

Is there a hormone for the induction of division in animal cells?

Answer 12

No

Unlike plant cells, no specific hormone induces division in animal cells.

Question 13

What is essential for animal cell division?

Answer 13

Centrosomes

Centrosomes play a crucial role in organizing the mitotic spindle in animal cells.

Question 14

What type of spindle is formed in animal cells?

Answer 14

Amphiastral

Amphiastral spindles have centrioles present and are involved in proper chromosome separation.

Question 15

Does midbody form during cytokinesis in animal cells?

Answer 15

Yes

Midbody formation occurs as the cleavage furrow deepens during division.

Question 16

Are microfilaments involved in cytokinesis for animal cells?

Answer 16

Yes

Microfilaments are critical for the formation of the cleavage furrow in animal cells.

Question 17

In what direction does cleavage occur during animal cell cytokinesis?

Answer 17

Centripetally

Cleavage furrow formation pulls the membrane inward toward the center of the cell.

Question 18

Where does mitotic cell division occur in animals?

Answer 18

Bone marrow and many epithelia

These tissues are sites of active cell division for growth and repair.

Question 19

What is a key difference in chromosome replication between mitosis and binary fission?

Answer 19

Mitosis: Chromosomes are replicated; Binary Fission: DNA is replicated

Mitosis involves complex processes with multiple checkpoints, while binary fission is simpler.

Question 20

What is a major use of mitosis?

Answer 20

Growth and repair

Mitosis is essential for increasing cell numbers during growth and healing.

Question 21

What is a significant outcome of mitosis?

Answer 21

Forms two membrane-bound nuclei

This results in two genetically identical daughter cells.

Question 22

How does the speed of mitosis compare to binary fission?

Answer 22

Slower process comparatively

Mitosis is generally a more time-consuming process than binary fission.

Question 23

How many subphases does mitosis have?

Answer 23

5 subphases

The five subphases of mitosis are prophase, metaphase, anaphase, telophase, and cytokinesis.

Question 24

Which cells utilize mitosis?

Answer 24

Eukaryotes with membrane-bound organelles

Only eukaryotic cells undergo mitosis, unlike prokaryotes.

Question 25

What is a key characteristic of binary fission?

Answer 25

Simple and very fast process ## Footnote Binary fission allows for rapid reproduction, especially in prokaryotes.

Question 26

What is a drawback of binary fission compared to mitosis?

Answer 26

Less reliable process ## Footnote Binary fission lacks the checkpoints that ensure accurate division in mitosis.

Question 27

How many subphases does binary fission have?

Answer 27

No subphases ## Footnote Binary fission is a straightforward process without the complexity of subphases.

Question 28

What type of cells can use binary fission?

Answer 28

Both prokaryotes and eukaryotes (some single-celled eukaryotes) ## Footnote This method is primarily associated with prokaryotic organisms, but some eukaryotes also reproduce this way.

Question 29

What does binary fission provide for genetic diversity?

Answer 29

Genetic diversity ## Footnote While binary fission typically produces identical daughter cells, genetic diversity can arise from mutations.

Question 30

What does binary fission create?

Answer 30

Two identical daughter cells ## Footnote This process results in two cells that are genetically identical to the original.