A haploid cell has?   a. one set of chromosomes   b. four sets of chromosomes   c. two sets of chromosomes     d. one half of a set of chromosomes 2. A cell cycle checkpoint DOES NOT exist in Mitosis. a. True b. False

A cell has a diploid chromosome number of 12. Draw a diagram of the chromosomal positioning in this cell during 1. Meiosis Metaphase I 2. Mitotic Anaphase

Which of the following is a characteristic of a cell undergoing cellular senescence? a.Doubling in physical size b.Production of SASPs c.Atypically low NGF1-A levels d.Abnormally high rate of proliferation

appear during various stages of either mitosis or meiosis, and answer the following questions. 45. Refer to the drawings in Figure 13.2 of a single pair of homologous chromosomes as they might II II IV VI Figure 13.2 Which diagram represents prophase I of meiosis? a. b. v II d. IV e. VI c. 46. If a cell does not receive a go ahead signal at the Gl checkpoint in the cell cycle then it will a. proceed on to the "S" phase b. go directly to jail c. proceed to mitosis d. enter a nondividing state called the Go phase DO not pass GO. DO not collect $200 47. When T2 phages infect bacteria and make more viruses in the presence of radioactive phosphorus, what is the result? The bacterial DNA will be radioactive. The viral DNA will be radioactive. The boacterial DNA will be radioactive. The viral DNA will be radioactive. The viral proteins will be radioactive. b. c. The viral DNA will be radioactive. d. e. The viral proteins will be radioactive. 48. Each amino acid attaches to its proper tRNA…