Question

Consider the DNA template to be used for replication: 3-ATCGGGAAATTCGGA-5' Which of the following choices shows the correctly replicated new strand of DNA?

a) 3'-ATCGGGAAATTCGGA-5
b) 5-ATCGGGAAATTCGGA---3'
c) 3'-TAGCCCTTTAAGCCT--5
d) 3'--TAGCCCTTTAAGCCT--5"
e) 5'-UAGCCCUUUAAGCCU---3'

Answer 1

The correctly replicated new strand of DNA from the template 3'-ATCGGGAAATTCGGA-5' is 5'-TAGCCCTTTAAGCCT-3', pairing each base with its complement.

Step-by-step explanation:

The question is asking to identify the correctly replicated new strand of DNA from the given DNA template sequence 3'-ATCGGGAAATTCGGA-5'. DNA replication involves synthesizing a new strand complementary to the template strand by matching each base with its complement (A with T, T with A, C with G, and G with C) in the direction from 5' to 3'. Given this rule:

• Adenine (A) pairs with Thymine (T)
• Cytosine (C) pairs with Guanine (G)
• Guanine (G) pairs with Cytosine (C)
• Thymine (T) pairs with Adenine (A)

Therefore, the correct replicated new strand, running 5' to 3', is the sequence 5'-TAGCCCTTTAAGCCT-3', which corresponds to option (c).