교과서 질문
Which of the following occurs during S phase?
(A) condensation of the chromosomes
(B) replication of the DNA
(C) separation of sister chromatids
(D) spindle formation
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3. Energy & Cell Processes
Interphase
1:47분문제 9
교과서 질문
If a cell at G1 contains four picograms of DNA, how many picograms of DNA will it contain at the end of the S phase of the cell cycle? a. 0; b. 2; c. 4; d. 8
검증된 단계별 안내1
Step 1: Understand the cell cycle. The cell cycle is a series of events that take place in a cell leading to its division and duplication. It consists of four main phases: G1, S, G2, and M.
Step 2: Identify the relevant phases. In this problem, we are interested in the G1 and S phases. The G1 phase is a period of activity where cells grow and carry out normal functions. The S phase is when DNA replication occurs.
Step 3: Understand DNA replication. During the S phase, the amount of DNA in the cell doubles as each DNA molecule is replicated to produce two identical copies.
Step 4: Apply this understanding to the problem. If a cell contains 4 picograms of DNA at the G1 phase, then after DNA replication in the S phase, the amount of DNA will double.
Step 5: Therefore, the cell will contain twice the amount of DNA at the end of the S phase compared to the G1 phase.
비슷한 문제에 대한 검증된 영상 답변:이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
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1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Cell Cycle
The cell cycle is a series of phases that a cell goes through to grow and divide. It consists of interphase (which includes G1, S, and G2 phases) and the mitotic phase (M phase). During the S phase, DNA replication occurs, resulting in the duplication of the cell's genetic material.
추천 영상:
가이드 코스
03:31
Cell Cycle Regulation
DNA Replication
DNA replication is the process by which a cell makes an identical copy of its DNA. This occurs during the S phase of the cell cycle, where each chromosome is duplicated, leading to two sister chromatids for each chromosome. If a cell starts with a certain amount of DNA, it will double that amount by the end of the S phase.
추천 영상:
가이드 코스
03:37Introduction to DNA Replication
Picograms of DNA
A picogram is a unit of mass equal to one trillionth of a gram (10^-12 grams). In the context of DNA, it is used to measure the amount of genetic material present in a cell. Understanding the measurement in picograms helps in quantifying the DNA content before and after replication during the cell cycle.
추천 영상:
가이드 코스
03:20DNA Repair
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