Across
- 3. the process by which a cell makes proteins using the genetic information carried in messenger RNA (mRNA)
- 4. a segment of a DNA or RNA molecule which does not code for proteins and interrupts the sequence of genes.
- 7. Pairing a pair of complementary bases in a double-stranded nucleic acid molecule, consisting of a purine in one strand linked by hydrogen bonds to a pyrimidine in the other. Cytosine always pairs with guanine, and adenine with thymine (in DNA) or uracil (in RNA).
- 12. a sugar of the pentose class which occurs widely in nature as a constituent of nucleosides and several vitamins and enzymes
- 13. 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.
- 14. The sequence of DNA present in mature messenger RNA, some of which encodes the amino acids of a protein
- 15. a compound which is one of the four constituent bases of nucleic acids. A purine derivative, it is paired with thymine in double-stranded DNA.
Down
- 1. Polymerase a multi-unit enzyme that synthesizes RNA molecules from a template of DNA through a process called transcription
- 2. a sugar derived from ribose by replacing a hydroxyl group with hydrogen.
- 5. a process by which foreign genetic material is taken up by a cell
- 6. 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.
- 8. Strand a single DNA strand that, during DNA replication, is replicated in the 5′ – 3′ direction (opposite direction to the replication fork).
- 9. a compound consisting of a nucleoside linked to a phosphate group. Nucleotides form the basic structural unit of nucleic acids such as DNA.
- 10. a sequence of three nucleotides which together form a unit of genetic code in a DNA or RNA molecule.
- 11. Strand a single DNA strand that, during DNA replication, is replicated in the 3' – 5' direction