BIOMOLECULES AND ENZYMES

BIOLOGY

NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Nucleotide bases pair in DNA through
A
hydrogen bonds between complementary bases
B
polar covalent bonds between complementary bases
C
sugar bonds between complementary bases
D
none of the choices
Explanation: 

Detailed explanation-1: -Note that complementary base pairs are : A-T and G-C. So, to find the complementary strand, replace A by T, G by C and vice versa. The Adenine-Thymine base pair is held together by 2 hydrogen bonds while the Guanine-Cytosine base pair is held together by 3 hydrogen bonds.

Detailed explanation-2: -DNA base pair. Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together. The binding of these base pairs forms the structure of DNA .

Detailed explanation-3: -The bond that connects two complementary nucleotides is a hydrogen bond. Hydrogen bonds are formed between atoms with partial charges called dipoles. Hydrogen usually has a positive dipole and a more electronegative atom, like oxygen or nitrogen has a negative dipole.

Detailed explanation-4: -The complementary base pairs of guanine with cytosine and adenine with thymine connect to one another using hydrogen bonds. These hydrogen bonds between complementary nucleotides are what keeps the two strands of a DNA helix together.

Detailed explanation-5: -Complementary base pairs form between nucleotides on opposite strands of DNA in a molecule via hydrogen bonding. These bonds help hold the strands together by specific nucleotide pairing, adenine to thymine and guanine to cytosine.

There is 1 question to complete.