DNA helicase unzips double-stranded DNA to expose single-stranded section of DNA. New strands are generated using the original strand as a template. How do the newly-generated strands compare to the original template strands?

MOLECULAR BIOLOGY

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

DNA helicase “unzips” double-stranded DNA to expose single-stranded section of DNA. New strands are generated using the original strand as a template. How do the newly-generated strands compare to the original template strands?

A	They are identical
B	They are twice as long
C	They are much shorter
D	They are complementary

Explanation:

Detailed explanation-1: -Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.

Detailed explanation-2: -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-3: -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. Complementary bases attach to one another (A-T and C-G).

There is 1 question to complete.

LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY