Quiz 13

20問 • 1年前

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問題一覧

Which phase of the cell cycle is characterized by the replication of DNA?

S phase

During which phase of the cell cycle does the cell grow and prepare for DNA replication?

G1 phase

What happens during the G2 phase of the cell cycle?

The cell undergoes final preparations for mitosis

Which phase of the cell cycle involves the division of a cell's nucleus and its contents?

M phase

What is the role of checkpoints in the cell cycle?

To ensure each phase is completed accurately before proceeding

Which enzyme is primarily responsible for adding nucleotides to a growing DNA strand during replication?

DNA polymerase

What is the role of DNA helicase in DNA replication?

Unwinding and separating the DNA strands

What is the primary function of RNA primase in DNA replication?

To synthesize short RNA primers needed for DNA polymerase to initiate synthesis

During DNA replication, what are Okazaki fragments?

Short, newly synthesized DNA fragments on the lagging strand

Which of the following best describes the direction in which DNA polymerase synthesizes a new strand?

5' to 3' direction on both strands

During which phase of mitosis do the chromosomes line up along the equatorial plane of the cell?

Metaphase

What event characterizes anaphase of mitosis?

Sister chromatids are pulled apart to opposite poles of the cell

Which structure is responsible for separating sister chromatids during mitosis?

Spindle fibers

What occurs during telophase of mitosis?

Nuclear membranes begin to form around each set of chromosomes

What is the primary purpose of mitosis in multicellular organisms?

To ensure equal distribution of replicated chromosomes to two daughter cells

During which phase of meiosis does crossing over, the exchange of genetic material between homologous chromosomes, occur?

Prophase I

How does meiosis I differ from meiosis II?

Meiosis I reduces chromosome number by half, while meiosis II does not change chromosome number

What is the result of meiosis in terms of cell number and genetic composition?

Four genetically diverse haploid cells

What happens to sister chromatids during Anaphase II of meiosis?

They separate and move toward opposite poles of the cell

What is the main purpose of meiosis in sexually reproducing organisms?

To create genetic diversity in gametes

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Quiz 12

問題一覧

Which phase of the cell cycle is characterized by the replication of DNA?

S phase

During which phase of the cell cycle does the cell grow and prepare for DNA replication?

G1 phase

What happens during the G2 phase of the cell cycle?

The cell undergoes final preparations for mitosis

Which phase of the cell cycle involves the division of a cell's nucleus and its contents?

M phase

What is the role of checkpoints in the cell cycle?

To ensure each phase is completed accurately before proceeding

Which enzyme is primarily responsible for adding nucleotides to a growing DNA strand during replication?

DNA polymerase

What is the role of DNA helicase in DNA replication?

Unwinding and separating the DNA strands

What is the primary function of RNA primase in DNA replication?

To synthesize short RNA primers needed for DNA polymerase to initiate synthesis

During DNA replication, what are Okazaki fragments?

Short, newly synthesized DNA fragments on the lagging strand

Which of the following best describes the direction in which DNA polymerase synthesizes a new strand?

5' to 3' direction on both strands

During which phase of mitosis do the chromosomes line up along the equatorial plane of the cell?

Metaphase

What event characterizes anaphase of mitosis?

Sister chromatids are pulled apart to opposite poles of the cell

Which structure is responsible for separating sister chromatids during mitosis?

Spindle fibers

What occurs during telophase of mitosis?

Nuclear membranes begin to form around each set of chromosomes

What is the primary purpose of mitosis in multicellular organisms?

To ensure equal distribution of replicated chromosomes to two daughter cells

During which phase of meiosis does crossing over, the exchange of genetic material between homologous chromosomes, occur?

Prophase I

How does meiosis I differ from meiosis II?

Meiosis I reduces chromosome number by half, while meiosis II does not change chromosome number

What is the result of meiosis in terms of cell number and genetic composition?

Four genetically diverse haploid cells

What happens to sister chromatids during Anaphase II of meiosis?

They separate and move toward opposite poles of the cell

What is the main purpose of meiosis in sexually reproducing organisms?

To create genetic diversity in gametes