A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in a cell doubled
a. Between prophase and anaphase of mitosis
b. Between the G1 and G2 phases of the cell cycle
c. During the M phase of the cell cycle
d. Between prophase I and prophase II of meiosis

Question

A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in a cell doubled

a. Between prophase and anaphase of mitosis

b. Between the G1 and G2 phases of the cell cycle

c. During the M phase of the cell cycle

d. Between prophase I and prophase II of meiosis

Accepted Answer

Hello everyone and welcome to today's video. So what happens to the sales that do not Undergo cell division after going through the G1 phase? Remember that in mitosis there's these extra phase called interface and this interface we're going to call it the growth phase which is where the cell after dividing is going to just grow in size in order for a second division to take place in the future. So this interface is going to be divided into three main phases which is going to be G one or growth one then as one or synthesis one and then G two which is growth two or the second phase of growth. However if growth do not does not occur in this growth one phase then these cell is not going to jump into the synthesis of one phase because it's still not ready for this phase. So what it's going to do instead is that it's going to jump into an extra phase or a checkpoint. Let's call it called G zero. And the cell is going to stay in this G zero state without growing until conditions become favorable and it starts growing again. At that point it is going to continue this process. So because of this the correct answer choice is going to be answer choice. D. They proceed to the G zero phase which is what we see here. But it's the end of the video and I really hope this video helped you

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Key Concepts

Mitosis

Cell Cycle

Meiosis