Total hydrogen bonds would exist between the following strands of DNA

In summary, a hydrogen bond is a weak chemical bond between a hydrogen atom and an electronegative atom. In DNA, they form between nitrogenous bases, contributing to the stability and structure of the double helix. There are 10 hydrogen bonds between complementary strands, and they are important for maintaining the shape of DNA and for processes like replication and protein synthesis. These bonds can be broken and reformed, allowing for unwinding and separation of DNA strands.
  • #1
wwwaazup
15
0
How many total hydrogen bonds would exist between the following strands of DNA and their complementary strands?
1. GCATGC
2. TATGGC
 
Physics news on Phys.org
  • #2


Review Watson-Crick base pairing.
 
  • #3


Thank you for your question. I can confirm that the total number of hydrogen bonds between DNA strands depends on the specific nucleotide sequences. In the first example, GCATGC, there would be a total of 6 hydrogen bonds between the two strands. This is because there are three complementary base pairs (G-C, A-T, and T-A) and each pair is held together by two hydrogen bonds. Therefore, 3 base pairs x 2 hydrogen bonds per pair = 6 total hydrogen bonds.

In the second example, TATGGC, there would be a total of 8 hydrogen bonds between the two strands. This is because there are four complementary base pairs (T-A, A-T, T-A, and G-C) and each pair is held together by two hydrogen bonds, resulting in 4 base pairs x 2 hydrogen bonds per pair = 8 total hydrogen bonds.

Overall, the total number of hydrogen bonds between complementary DNA strands is determined by the number of base pairs and the specific nucleotide sequences. I hope this clarifies your question. Thank you.
 

1. What is a hydrogen bond?

A hydrogen bond is a type of chemical bond that occurs between a hydrogen atom and an electronegative atom such as nitrogen, oxygen, or fluorine. It is a weak bond, but it plays a crucial role in holding together biological molecules like DNA.

2. How do hydrogen bonds form between DNA strands?

Hydrogen bonds form between the nitrogenous bases of DNA strands. Specifically, adenine pairs with thymine and guanine pairs with cytosine, and these base pairs are held together by hydrogen bonds. These bonds contribute to the stability and structure of the DNA double helix.

3. How many total hydrogen bonds exist between DNA strands?

There are a total of 10 hydrogen bonds between two complementary DNA strands. This is because there are 2 hydrogen bonds between adenine and thymine, and 3 hydrogen bonds between guanine and cytosine.

4. Why are hydrogen bonds important in DNA?

Hydrogen bonds play a crucial role in maintaining the double helix structure of DNA. Without these bonds, the DNA molecule would not be able to maintain its shape and would be more susceptible to damage. Additionally, hydrogen bonds are also important in DNA replication and protein synthesis.

5. Can hydrogen bonds be broken?

Yes, hydrogen bonds can be broken and reformed. They are relatively weak compared to other types of chemical bonds, which allows for the unwinding and separation of DNA strands during processes such as DNA replication and transcription. However, these bonds are strong enough to maintain the structure of DNA under normal physiological conditions.

Similar threads

  • Biology and Chemistry Homework Help
Replies
16
Views
2K
  • Biology and Chemistry Homework Help
Replies
2
Views
1K
  • Biology and Chemistry Homework Help
Replies
6
Views
2K
  • Biology and Chemistry Homework Help
Replies
1
Views
2K
Replies
8
Views
974
  • Biology and Chemistry Homework Help
Replies
1
Views
1K
  • Biology and Chemistry Homework Help
Replies
4
Views
2K
  • Biology and Medical
Replies
6
Views
2K
  • Biology and Chemistry Homework Help
Replies
1
Views
1K
  • Biology and Chemistry Homework Help
Replies
2
Views
6K
Back
Top