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Chapter 11: Problem 8

In intervals of interphase, G stands for _____________. a. gap b. growth c. Gey d. gene

Short Answer

Expert verified
In interphase, 'G' stands for 'gap'.

Step by step solution

01

Understand the Question

The question asks about what 'G' stands for in the context of interphase, which is a part of the cell cycle.
02

Identify the Context of Interphase

In the context of the cell cycle, interphase is a phase where the cell prepares for division. It consists of several stages including G1, S, and G2 phases.
03

Define the Meaning of 'G' in Interphase

The cell cycle phases are: G1 (Gap 1), S (Synthesis), G2 (Gap 2). In the context of interphase, 'G' refers to 'Gap' phases, which are periods before and after DNA synthesis.
04

Choose the Correct Answer

Given the options: a. gap b. growth c. Gey d. gene, the correct answer based on the definition is option 'a', where 'G' stands for 'gap'.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Interphase
The interphase is a crucial part of the cell cycle where the cell prepares itself for division. It is not just one phase but comprises three key stages: G1, S, and G2. During interphase, the cell is not dividing but is highly active in terms of biochemical reactions, growth, and DNA synthesis.

Here are some important attributes of interphase:
  • Cells increase in size.
  • DNA is replicated to ensure that both daughter cells have a complete set of chromosomes.
  • The cell undergoes growth in preparation for cell division.
Interphase is often considered the longest phase of the cell cycle, as the cell takes its time to ensure everything is in order before proceeding to mitosis, where actual cell division occurs. This phase is essential for the health and proper function of the cell since any error in DNA replication can lead to mutations.
G1 Phase
The G1 phase, also known as the first 'Gap' phase, is the first step within the interphase. After a cell has divided, it enters the G1 phase to start growing and preparing for DNA synthesis that occurs in the subsequent S phase. Key points about G1 phase:
  • This is the phase where cells increase their mass and volume significantly by synthesizing proteins and RNA.
  • It acts as a preparatory phase where cells decide whether to divide again, if adequate nutrients and growth signals are present.
By the end of the G1 phase, the cell has basically equipped itself for DNA replication, ensuring that it's ready to enter the S phase, where genetic material will be precisely copied.
G2 Phase
The G2 phase, or the second 'Gap' phase, directly follows the S phase in interphase. By this time, the cell has completed DNA replication, but still needs to prepare several aspects to ensure smooth cell division. What happens in the G2 phase?
  • The cell checks for DNA damage or replication errors, initiating repair processes if necessary.
  • Centrosomes and other cellular structures required for mitosis begin to form.
  • This phase ensures that all proteins and molecules required for the successful mitotic process are synthesized.
The G2 phase serves as the final checkpoint before mitosis begins, making sure that all components are fully assembled and functional, leading to the success of the cell cycle.

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Most popular questions from this chapter

Match each stage with the events listed. __________metaphase __________prophase __________telophase __________anaphase a. sister chromatids move apart b. chromosomes start to condense c. new nuclei form d. all duplicated chromosomes are aligned at the spindle equator

Name any checkpoint gene.

The spindle attaches to chromosomes at the ____________. a. centriole b. contractile ring c. centromere d. centrosome

Match each term with its best description. ________cell plate ________spindle ________tumor ________cleavage furrow ________contractile ring ________cancer ________centrosomes a. lump of cells b. made of microfilaments c. divides plant cells d. organizes the spindle e. metastatic cells f. made of microtubules g. indentation

The chromosomes align at the midpoint of the spindle during ____________. a. prophase b. metaphase c. anaphase d. telophase e. interphase f. cytokinesis
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