GCD Final Test Questions with Complete Solutions

GCD Final Test Questions with Complete Solutions Cell theory is the idea that - Answer-all living matter consists of cells, cells are the structural and functional units of life, and all cells come from preexisting cells. Endosymbiosis has been proposed as the explanation for the origin of a defining cellular characteristic of all - Answer-Eukaryotes You are interested in studying a gene called CFTR because mutations in this gene cause cystic fibrosis. You have made a line of mice that lack the mouse CFTR gene. These mice are unable to clear bacteria from their lungs, so they get lung disease. You put a normal human CFTR gene into some of these mice and discover that the mice with the human gene are able to clear bacteria from their lungs and no longer get lung disease. From this experiment, you can conclude that: - Answer-The mouse CFTR gene and human CFTR gene encode proteins that can serve a similar function. Name structures that can be resolved by light microscopy. - Answer-Chromosome Chloroplast Mitochondria Nucleus Bacteria Golgi Apparatus In comparing the complete genomes of five bacteria, one archaean, and one eucaryote (yeast), it was found that 239 families of protein-coding genes have representatives in all three domains. Which of the following families of genes would you expect to NOT be included in all three domains? - Answer-Those involved in trafficking molecules in and out of the cell Which of the following statements about the structure and function of DNA is FALSE? - Answer-All functional DNA sequences inside a cell code for protein products, and the gene sequences correspond exactly to the protein sequences produced from them. What makes a DNA negatively charged? - Answer-Phosphate backbone what determines the melting temperature for DNA? - Answer-the ratio of AT and CG base pairs Which of the following statements about eukaryotic chromosomes is FALSE? - Answer-Differential gene expression requires selective unpackaging of the chromatin by chromatin remodeling complexes that covalently modify the amino acids in the histone proteins.