Biology final

2. the process where a cell makes an exact copy of its DNA, ensuring each new daughter cell has a complete set of genetic information
3. a compound that occurs in guano and fish scales, and is one of the four constituent bases of nucleic acids. A purine derivative, it is paired with cytosine in double-stranded DNA.
6. a sugar derived from ribose by replacing a hydroxyl group with hydrogen.
7. Bonds a type of strong dipole-dipole attraction that occurs between a hydrogen atom covalently bonded to a very electronegative atom
11. a compound found in living tissue as a constituent base of RNA. In DNA its place is taken by thymine.
12. the central and most important part of an object, movement, or group, forming the basis for its activity and growth.

1. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins.
2. a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule.
4. a compound consisting of a nucleoside linked to a phosphate group. Nucleotides form the basic structural unit of nucleic acids such as DNA.
5. nitrogen-containing organic compounds that are essential building blocks of nucleic acids like DNA and RNA
6. the molecule that carries genetic information for the development and functioning of an organism
8. a nucleic acid present in all living cells that has structural similarities to DNA
9. a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
10. a compound which is one of the four constituent bases of nucleic acids. A pyrimidine derivative, it is paired with adenine in double-stranded DNA.