Biology Crossword

1. a chemical bond that is formed by joining the carboxyl group of one amino acid to the amino group of another
3. kind of virus that affects bacteria
4. molecules that act as temporary carriers of amino acids
6. either of the two nitrogen-containing sections of a nucleotide that bond together to connect strands of DNA or RNA
8. a link (or adaptor) between the messenger RNA (mRNA) molecule and the growing chain of amino acids that make up a protein
10. process in which one strain of bacteria is changed by a gene or genes from another strain of bacteria
13. expressed sequence of DNA; codes for a protein
16. principle enzyme involved in DNA replication
17. the process by which a cell makes an RNA copy of a piece of DNA
20. an intercellular structure made of both RNA and protein
21. the process by which amino acids are linearly arranged into proteins through the involvement of ribosomal RNA, transfer RNA, messenger RNA, and various enzymes

2. principle that bonds in DNA can form only between adenine and thymine and between cytosine and guanine
5. process of copying DNA prior to cell division
7. a type of single-stranded RNA involved in protein synthesis
9. a region of DNA upstream of a gene where relevant proteins (such as RNA polymerase and transcription factors) bind to initiate transcription of that gene
11. repetitive DNA at the end of a eukaryotic chromosome
12. A molecule that contains two or more amino acids
14. molecules that combine to form proteins
15. sequence of DNA that is not involved in the coding for protein
18. a sequence of three nucleotides (a trinucleotide) in DNA or messenger RNA (mRNA) that signals a halt to protein synthesis in the cell
19. the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis
22. the structure in a cell that contains the chromosomes