How many hydrogen bonds exist between cytosin and guanine?

How many hydrogen bonds are formed between Adenine and thymine?

What is a hydrogen bond?

How are chemical bonds formed between two atoms ?

Define hydrogen bond. Is it weaker or stronger than the vander Waals forces?

Hydrogen bonding is defined as______

Answer the following questions : How many covalent bonds are there in a molecule of cyclohexane?

Complete the paragraph Fill in the blanks by selecting the correct word from the bracket and complete the given paragraph. (adenine, phosphoric acid, centromeres, cytosine, nucleotides, ribonucleic acid, guanine, thymine) In 1953, Watson and Crick produced a model of the DNA molecule. As per this model, each strand in the molecule of DNA is made up of many small molecules known as _________. There are four types of nitrogenous bases adenine, guanine, cytosine and thymine_________and __________are called as ‘purines’ while _________and_________ are called ‘pyrimidines’. In the structure of the nucleotide, a molecule of a nitrogenous base and _________are each joined to a molecule of sugar.

The fatty acids which do not have double bond between carbon atoms of its chain and consist off maximum possible hydrogen atoms are

Distinguish between sigma and pi bond.

Strongest hydrogen bond is shown by __________.