3. F Evidence suggests that mitochondria and chloroplast originated via endosymb

Question

3. F Evidence suggests that mitochondria and chloroplast originated via endosymbiosis, with eukaryotes acquiring chloroplasts before mitochondria.

4. F All plant cells have a cell wall. Initially all plant cells have a primary cell wall, but this is replaced by a secondary cell wall after two to three months.

5. F In DNA replication, after primase lays down the RNA primer, DNA polymerase III adds nucleotides to the new DNA strand. This is followed by DNA polymerase I, which is the last enzyme in the process of DNA replication.

6. F Although the majority of protein synthesis occurs via ribosomes, in plants some proteins are constructed by the vacuole.

7. F A missense mutation will result in the formation of stop codon.

8. F the haplobiontic haploid life cycle, which is common in algae, only includes one multicellular stage, in the haplobiontic haploid life cycle meiosis occurs twice.

Explanation / Answer

3. Evidence suggests that mitochondria and chloroplast originated via endosymbiosis, with eukaryotes acquiring mitochondria before chloroplasts. 4. All plant cells have a cell wall. Some plants also have a secondary cell wall. 5. In DNA replication, after primase lays down the RNA primer, DNA polymerase III adds nucleotides to the new DNA strand. This is followed by DNA polymerase II, which is edits errors. the last enzyme is required to seal the loose ends together. This enzyme is ligase. 6. All protein synthesis occurs via ribosomes. 7. A missense mutation will result in an amino acid substitution. A nonsense mutation will results in the formation of stop codon. 8. The haplobiontic haploid life cycle, which is common in algae, includes a haploid multicellular stage. Meiosis occurs once--during the diploid stage.

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