Podcast Beta
Questions and Answers
Genes are composed of deoxyribonucleic acid (DNA), except in some ______, which have genes consisting of a closely related compound called ribonucleic acid (RNA).
viruses
A DNA molecule is composed of two chains of ______ that wind about each other to resemble a twisted ladder.
nucleotides
The sides of the ladder are made up of ______ and phosphates, and the rungs are formed by bonded pairs of nitrogenous bases.
sugars
These bases are ______ (A), guanine (G), cytosine (C), and thymine (T).
Signup and view all the answers
If the bonds between the bases are broken, the two chains unwind, and free nucleotides within the cell attach themselves to the exposed bases of the now-separated chains. The free nucleotides line up along each chain according to the base-pairing rule—A bonds to T, C bonds to G. This process results in the creation of two identical DNA molecules from one original and is the method by ______
Signup and view all the answers
DNA molecules are composed of two chains of ______ that wind about each other to resemble a twisted ladder.
Signup and view all the answers
The bonds between the bases are broken, the two chains unwind, and free nucleotides within the cell attach themselves to the exposed bases of the now-separated chains. The free nucleotides line up along each chain according to the base-pairing rule—A bonds to T, C bonds to G. This process results in the creation of two identical DNA ______ from one original and is the method by which DNA replicates.
Signup and view all the answers
The sides of the ladder are made up of sugars and ______, and the rungs are formed by bonded pairs of nitrogenous bases.
Signup and view all the answers
Genes are composed of ______ acid (DNA), except in some viruses, which have genes consisting of a closely related compound called ribonucleic acid (RNA).
Signup and view all the answers
These bases are adenine (A), guanine (G), cytosine (C), and ______ (T).
Signup and view all the answers
