BIO MITOSIS(1.1.3,1.2.2)

2. What process best explains how a nerve cell and a muscle cell can both develop from the same fertilized egg? 

• A. differentiation 
• B. natural selection
• C. selective breeding 
• D genetic engineering 

4. Before mitosis begins, which happens before the nucleus starts dividing? 

• A. The cytoplasm separates. 
• B.The DNA replicates.
• C.The sister chromatids separate.
• D.The homologous chromosomes cross over.

22. Which best explains why muscle cells are different from blood cells? 

• A.A mutation occurs during the development of muscle cells but not in blood cells.
• B.Different genes are activated in muscle cells than in blood cells.
• C.Muscles cells experience different environmental influences than blood cells.
• D.Muscle cells are produced by the brain, but blood cells are produced by the heart.

24. During which phase of the cell cycle is the cell growing and preparing for cellular division? 

• A.cytokinesis
• B.anaphase
•  C.prophase
• D. interphase

42. How does DNA code for proteins in a cell?

• A. by creating a new double helix structure 
• B.by using its phosphate and sugar molecules
• C.by adding more hydrogen bonds to its structure
• D.by arranging certain nitrogen bases of the cell in a particular order

43. What is the result when a single cell reproduces by mitosis?

• A.two cells with genetic material identical to the parent cell
• B.two cells with half the genetic material of the parent cell
• C.four cells with half the genetic material of the parent cell
• D.four cells with genetic material identical to the parent cell