UNIT 5 BIOLOGY

5. mutation involving a long segment of DNA.
6. single DNA strand that, during DNA replication, is replicated in the 3' – 5' direction.
10. a mutation is an alteration in the nucleic acid sequence of the genome of an organism.
11. he heritable condition of possessing more than two complete sets of chromosomes.
12. small RNA molecule that plays a key role in protein synthesis.
17. a sugar derived from ribose by replacing a hydroxyl group with hydrogen.
18. is the process in which ribosomes in the cytoplasm.
19. a segment of a DNA or RNA molecule which does not code for proteins and interrupts the sequence of genes.
20. the membrane-enclosed organelle within a cell that contains the chromosomes.

1. a small RNA molecule that plays a key role in protein synthesis.
2. a type of single-stranded RNA involved in protein synthesis.
3. together form a unit of genetic code in a DNA.
4. a sequence of three nucleotides
7. member of a family of enzymes that catalyze the synthesis of DNA
8. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA.
9. mutation is an alteration in the nucleic acid sequence of the genome of an organism.
13. macromolecular machines, found within all cells, that perform biological protein synthesis.
14. a segment of a DNA or RNA molecule containing information coding for a protein.
15. a region of DNA upstream of a gene where relevant proteins bind to initiate transcription of that gene.
16. a single DNA strand that, during DNA replication, is replicated in the 5′ – 3′ direction.