THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The DNA needs to be separated into two template strands so protein can be translated.
|
|
|
The DNA needs to be separated into two template strands so messenger RNA can be made.
|
|
|
The two strands of DNA need to each be moved into a new cell before replication can occur.
|
|
|
The two strands of DNA need to be separated so new bases can pair with each template strand.
|
Detailed explanation-1: -DNA replication occurs through the help of several enzymes. These enzymes “unzip” DNA molecules by breaking the hydrogen bonds that hold the two strands together. Each strand then serves as a template for a new complementary strand to be created.
Detailed explanation-2: -Before replication can occur, the length of the DNA double helix about to be copied must be unwound. Once the DNA strands have been unwound, they must be unzipped to expose the bases so that new nucleotide partners can bond to them.
Detailed explanation-3: -The first step in DNA replication is to ‘unzip’ the double helix structure of the DNA? molecule. This is carried out by an enzyme? called helicase which breaks the hydrogen bonds? holding the complementary? bases? of DNA together (A with T, C with G).
Detailed explanation-4: -To begin DNA replication, unwinding enzymes called DNA helicases cause the two parent DNA strands to unwind and separate from one another at the origin of replication to form two “Y-shaped” replication forks. These replication forks are the actual site of DNA copying.