Biology A Unit 4: Lessons 15-21 | questions and answers 2023/24

Biology A Unit 4: Lessons 15-21 | questions and answers 2023/24 Lesson 15: - Lesson 15: Cells spend most of their time in which phase of the cell cycle? - interphase Study the diagram. What two phases of the cell cycle include cell growth? - G1 and G2 What are the locations in the cell cycle where proteins can initiate or stop the next phase of the cycle called? - checkpoints In one phase of the cell cycle, the cells are no longer dividing. What is this phase called? - G0 What is the repeated series of steps that involve cellular growth and division called? - cell cycle A checkpoint protein may activate a preprogrammed self-destruct sequence in a cell's DNA code if DNA damage is detected. What term correctly describes this process? - apoptosis According to this diagram, in which phase of the cell cycle do cells spend the most time? What statements are true about the metaphase checkpoint? Select all that apply. - If the metaphase checkpoint were not in place, cells could receive too many or too few chromosomes. The metaphase checkpoint occurs during mitosis. What is a characteristic of cells in the G0 phase? - lack of cell division Which components of the cell cycle represent interphase? - G1, S, and G2 In which stage does the duplication of DNA occur? - S Lesson 16: - Lesson 16: What is a chromosome? - a structure found in cells that contains DNA Which type of protein does eukaryotic DNA wrap around to form chromosomes? - histone proteins Which is a characteristic of a diploid cell? - It has two sets of chromosomes. What is the term for chromosomes that are similar in size and shape and that contain variations of the same genes? - homologous chromosomes What are genes? - sections of DNA that control traits by encoding specific proteins What is the structure of prokaryotic chromosomes? - circular DNA with no histones Which correctly describes the role of histones in eukaryotic cell division? - Histones keep the DNA compact and organized. A structure has these features: It is inside a pr