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3 years ago

Which checkpoint requires a cell to be of adequate size in order to move to the next phase in the cell cycle?

Biology

2 answers:

Helen [10]3 years ago

4 0

Ans. (a.) g 1/s checkpoint.

Cell cycle checkpoints are defined as control mechanisms to regulate cell divisions in eukaryotic cells. G1 (gap 1) phase represents first phase of cell division, during which cell prepares to divide by growing its size, synthesizing mRNA and proteins.

Cell cycle checkpoint that checks whether the dividing cell size is adequate or not in order to move in next cell cycle phase is G1/S checkpoint.

After passing G1/S checkpoint, cell enters to the next phase, known as S phase (synthesis phase), in which DNA replication takes place.

Thus, the correct answer is option (a).

NNADVOKAT [17]3 years ago

3 0

Cells grow during both Gap 1 and 2, but since we've to choose a proper answer, I'd go for A, the G1 checkpoint, the first one.

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Citrus2011 [14]

This statement is incomplete.

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Explanation :

Photosynthesis occurs only during day time.

During this time oxygen is produced . Some oxygen is used for respiration and rest of oxygen is diffused out into air.

Carbon dioxide produced during day time by respiration is used in photosynthesis.

But at night time, no photosynthesis occurs and hence no oxygen is produced oxygen from air diffuses into leaves to carry out respiration and carbon dioxide produced by respiration diffuses out into air.

Hence Respiration occurs day and night .. Hence Carbon dioxide is emitted all the time....

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3 years ago

How has increased global travel boosted the spread of certain species?

ser-zykov [4K]

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Explanation:

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3 years ago

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n200080 [17]

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3 years ago

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Zarrin [17]

Answer:

inheritable changes
genetic
generations

I don't know about the second sentence, is it possible you give me a bit more of a context then maybe i can be of help

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I am Lyosha [343]

I believe the correct answer to this question would be:

far beyond the reach of <u>sunlight</u>

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3 years ago