Question

1 When a single cell of E. coli reproduces, it first duplicates its DNA. Next, the cell elongates as each copy of DNA is pulled toward opposite ends of the cell. The membrane then pinches inward, dividing the cytoplasm into two halves and producing two daughter cells. What is true about these daughter cells?

Answer 1

Answer:  The correct answer is :  All statements are true.

Explanation:  1. Chromosome replication begins; one copy of the origin moves rapidly towards the other end of the cell.

2. Replication continues. One copy of the origin is now at each end of the cell.

3. Replication finished. The plasma membrane grows inward, and the new cell wall is deposited.

4. Two daughter cells result. Each cell inherits a complete genome.

Answer 2

Answer:

The question is incomplete, the complete question is:

When a single cell of E. coli reproduces, it first duplicates its DNA. Next, the cell elongates as each copy of dna is pulled toward opposite ends of the cell. the membrane then pinches inward, dividing the cytoplasm into two halves and producing two daughter cells. what is true about these daughter cells? a. they are genetically different from the parent because they are produced by sexual reproduction. b. they are genetically identical to the parent because they are produced by sexual reproduction. c. they are genetically identical to the parent because they are produced by asexual reproduction. d. they are genetically different from the parent because they are produced by asexual reproduction.

THE CORRECT ANSWER IS C

Explanation:

This process that E. coli bacteria undergoes is called BINARY FISSION. This process of binary fission is a form of asexual reproduction which bacteria uses to reproduce or add to their population. Binary fission is a form of cell division, similar to mitosis that occurs in eukaryotic cells.

As highlighted above, the bacteria cell first replicates its DNA (in its nucleoid) at a spot on the circular chromosome called ORIGIN OF REPLICATION. After replication, the duplicated chromosomes get pulled apart to the opposite ends of the cell. After which the membrane pinches inward to form a SEPTUM (dividing new wall). The septum splits down the middle, releasing the two daughter cells as individual bacterium.

This process is a form of asexual reproduction similar to mitosis in the sense that two identical daughter cells are produced i.e. genetic variation does not occur.