Question

1. the diagram shows the cell cycle. the label \interphase\ has been omitted from this model. which best describes how the term \interphase\ could be correctly added?

various stages in the cell cycle
of a particular cell

a. add the term with an arrow pointing only to the s stage.
b. add the term with arrows pointing to both mitosis and cytokinesis.
c. add the term with arrows pointing to both the g₁ and g₂ stages.
d. add the term with arrows pointing to the g₁, s, and g₂ stages.

1. during the cell cycle most cell growth happens during the ______ phase.

a. s c. c
b. g₁ d. m

1. which of the following shows the correct sequence of the cell cycle?

a. c → m → g₁ → s → g₂ c. g₁ → s → g₂ → m → c
b. s → g₁ → g₂ → m → c d. none of the above

1. the stage of the cell cycle that occupies about 90% of the cells life is

a. cytokinesis c. g2.
b. mitosis d. interphase.

1. during which phase of the cell cycle are chromosomes replicated?

a. s phase
b. m phase
c. cytokinesis
d. metaphase

Explanation:

• Question 31: Interphase consists of \(G_1\), \(S\), and \(G_2\) stages. So, the term "interphase" should be added with arrows pointing to these three stages.
• Question 32: Most cell growth occurs during the \(G_1\) phase as the cell increases in size and synthesizes proteins and organelles.
• Question 33: The correct sequence of the cell cycle is \(G_1\) (growth) \(\to S\) (DNA synthesis) \(\to G_2\) (pre - mitotic growth) \(\to M\) (mitosis) \(\to C\) (cytokinesis).
• Question 34: Interphase occupies about 90% of the cell's life. It is the stage where the cell prepares for division by growing, replicating DNA, and synthesizing proteins.
• Question 35: Chromosomes are replicated during the \(S\) phase (synthesis phase) of the cell cycle.

Answer:

• Question 31: D. Add the term with arrows pointing to the \(G_1\), \(S\), and \(G_2\) stages.
• Question 32: B. \(G_1\)
• Question 33: C. \(G_1\to S\to G_2\to M\to C\)
• Question 34: D. Interphase
• Question 35: A. \(S\) phase