Which statement of hydrogen bonding is true?
Which statement of hydrogen bonding is true?
The correct answer: The true statement about the hydrogen bond is c. Hydrogen bond is weak force between atoms in a molecule but is of enormous…
What is the role of hydrogen bonds in the formation of DNA?
Hydrogen bonds are responsible for specific base-pair formation in the DNA double helix and a major factor to the stability of the DNA double helix structure. A hydrogen-bond donor includes the hydrogen atom and the atom to which it is most tightly linked with.
Which of the following is correct about hydrogen bonding in DNA?
The structure of DNA molecule is a double helix structure. In this structure double helix are made up of polynucleotide chains which are held together by H-bonds. In these helixes the adenine (A) base is linked with thymine (T) by two H-bonds and guanine (G) is linked with cytocine (C) by three H-bonds as A≡T, and G≡C.
Which base is present in RNA but not in DNA?
Thymine is present in DNA but absent in RNA, while Uracil is present in RNA but absent in DNA. Cytosine is present in both DNA and RNA.
What is responsible for the alpha helical structure of proteins?
Hydrogen bonding is responsible for the formation of alpha-helix and beta-sheet structures in proteins. The α-helix is very stable because all of the peptide groups (—CO—NH—) take part in two hydrogen bonds, one up and one down the helix axis. A right-handed helix is most stable for L-amino acids.
Which of the following is are incorrect about H bonding?
Which of the following representation of hydrogen bonding is (are) incorrect? The correct option is (a). Because, here N ion is sharing a bond with four methyl groups, and hydrogen bond is present between O and N which is not possible. Thus, this makes the bonding incorrect.
Which among the following is not an example of hydrogen bond?
Which among the following is not an example of hydrogen bond? Explanation: There is no hydrogen bond in liquid HCl since the bond breaks up when dissolved in water. Explanation: Atoms undergo bonding to attain stable electronic configuration and to gain energy. 8.
Which of the following correctly represents H-bonding?
CH3−O−H.
What is the maximum number of hydrogen bonds in which a water molecule can participate?
four
Is HF solid?
HF is widely used in the petrochemical industry as a component of superacids….Hydrogen fluoride.
| Names | |
|---|---|
| Chemical formula | HF |
| Molar mass | 20.006 g·mol−1 |
| Appearance | colourless gas or colourless liquid (below 19.5 °C) |
| Density | 1.15 g/L, gas (25 °C) 0.99 g/mL, liquid (19.5 °C) 1.663 g/mL, solid (–125 °C) |