What happens in the S phase of interphase? O Growth of cell preparation of cellular division O DNA replication

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What happens in the S phase of interphase?
O Growth of cell
O preparation of cellular division
O DNA replication
Transcribed Image Text:What happens in the S phase of interphase? O Growth of cell O preparation of cellular division O DNA replication
How many chromosomes do most cells have in their nuclei?
O 23
O 92
O 46
Transcribed Image Text:How many chromosomes do most cells have in their nuclei? O 23 O 92 O 46
Expert Solution
Step 1 S phase of interphase

In S phase of interphase is responsible for the synthesis or replication of DNA. By which, the genetic material of a cell is doubled before it enters mitosis or meiosis, making enough DNA to be split into daughter cells 

Following replication, each chromosome now consists of two sister chromatids (see figure below). Thus, the amount of DNA in the cell has effectively doubled

Biology homework question answer, step 1, image 1

 

So correct answer will be DNA Replication

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