Biology

5. What is the first step in protein synthesis?
10. is the control of body temperature
12. Any agent that causes cancer is called.....
13. Phagocytic white blood cells are also known as.....
16. An organ used for breathing
18. An ..... is a particular variety of a gene.
20. Plant cells are linked to neighbouring cells by means of fine strands of cytoplasm called......
21. Tiny air sacs that function as basic respiratory units

1. The ends of chromosomes are ‘sealed’ by structures called .....
2. The removal of these unwanted products of metabolism
3. Are involved in seed germination and controlling stem elongation
4. Involves the engulfing of the material by the cell surface membrane to form a small sac
6. The smaller molecules from which DNA and RNA molecules are made
7. A type of allele that when present on its own will not affect the individual
8. Is a long molecule that contains our unique genetic code
9. The type of nuclear division that halves the chromosome number
11. These are finger-like extensions of the cell surface membrane
14. The parts of a flower that are often conspicuously colored
15. A disease that is transferred by mosquitos.
17. A cell which contains only one set of chromosomes
19. Are protein molecules which can be defined as biological catalysts