Question

how dna is copied

1. what does it mean that the two strands of dna are complementary?
2. what is dna replication?

Explanation:

• For question 4: DNA has two strands. Complementary means that the bases on one strand pair specifically with bases on the other strand. Adenine (A) pairs with Thymine (T) and Cytosine (C) pairs with Guanine (G). So, the two strands can be used as templates for each other during processes like replication.
• For question 5: DNA replication is the process by which a cell makes an identical copy of its DNA. It occurs before cell division (such as mitosis or meiosis) so that each new cell gets a complete set of genetic information. The double - stranded DNA unwinds, and each strand serves as a template for the synthesis of a new complementary strand.

Answer:

1. It means that the bases on one strand of DNA pair specifically with bases on the other strand (A - T and C - G), allowing each strand to act as a template for the synthesis of a new strand.
2. DNA replication is the process of making an identical copy of DNA, which occurs before cell division to ensure each new cell has a full set of genetic material. The double - stranded DNA unwinds, and each strand serves as a template for building a new complementary strand.