Question

1. scientists have reported that more than 95% of the mutations that lead to some types of cancers are caused by mistakes made during dna - copying errors. during which phase of the cell cycle do these dna - copying errors most likely occur? a. s phase b. g1 phase c. g2 phase d. m phase 5. which of these best completes this concept - map? a. an animal cell b. a prokaryotic cell c. a virus d. a plant cell 6. why do eukaryotic cells require mitochondria? a. to break down cell debris for recycling b. to control division for cell reproduction c. to release stored energy for cell activities d. to package materials made in cells for transport 7. which of the following organelles use carbon dioxide to produce sugars? a. vacuoles b. ribosomes c. chloroplasts d. mitochondria 8. the diagram represents a cellular process. which molecule is a direct product of this cellular process? a. glucose b. phospholipid c. insulin d. dna

Explanation:

1. For the question about DNA - copying errors during the cell - cycle phase, DNA replication occurs in the S phase and errors can happen then.
2. Eukaryotic cells require mitochondria to release stored energy for cell activities through cellular respiration.
3. Chloroplasts use carbon dioxide to produce sugars through photosynthesis.
4. The concept map with a cell membrane, DNA, mitochondria, and chloroplasts best represents a plant cell as plant cells have all these components.
5. The diagram represents photosynthesis where the direct product along with oxygen is glucose.

Answer:

1. A. S phase
2. C. to release stored energy for cell activities
3. C. chloroplasts
4. D. a plant cell
5. A. Glucose