It is apparent that the plant, even though currently robust and healthy, contains recessive genes responsible for the defective chloroplasts. These recessive genes were passed on to the next generation and became dominant with some of the offspring . 3. You have grown a culture of human cells and discover that it is heavily contaminated with bacteria. Which TWO of the following procedures will most likely eliminate the bacteria without killing the human cells Of the two choices, treating the culture with a drug that damages bacterial ribosome is more likely to also damage human cells. It should be noted that like bacteria, human cells also contains ribosomes. If the drug used caused accumulated in the human cells' cytoplasm, it can also possibly stop protein synthesis.
4. Circle the appropriate cell type in which the listed structure or molecule can be found. Note that the structure or molecule can be found in more than one type of cell.
Structure or Molecule Cell Type
A. DNA animal plant bacterial
B. nucleus animal plant bacterial
C. plasma membrane animal plant bacterial
D. chloroplast animal plant bacterial
E. cell wall animal plant bacterial
F. lysosome animal plant bacterial
G. mitochondrion animal plant bacterial
H. Golgi apparatus animal plant bacterial
5. Circle the simplest model organism best used to study the following processes:
Process Model Organism
A. DNA replication E. coli yeast C. elegans
B. chloroplast function C. elegans Arabidopsis Drosophila
C. immunology mouse yeast Arabidopsis
D. development of a Drosophila E. coli yeast
6. Atoms form covalent bonds with each other by
A. sharing protons.
B. sharing electrons.
C. transferring electrons from one atom to the other.
D. sharing neutrons.
E. attraction of positive and negative charges.
7. An ionic bond between two atoms is formed as a result of the
A. sharing of electrons.
B. loss of a neutron from one atom.
C. loss of electrons from both atoms.
D. loss of a proton from one atom.
E. transfer of electrons from one atom to the other.
8. Match the chemical groups shown in the first list with their names selected from the second list.