A cell has a defect that results in the loss of its ability to regulate the passage of materials such as water, food and wastes into and out of the cell. In which of the following cell structures is this issue most likely to be found?
a. Ribosomes
b. Cell membrane
c. Chloroplasts
d. Endoplasmic reticulum

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?

Which property is best to use when determining the strength of an ionic bond in a solid lattice energy conductivity hardness solubility