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BSC 108 Exam 1 Module 3 2025 Questions and Answers All organisms are composed of... - ....ANSWER All cells are ____________________ - ....ANSWER ...-one or more cells ...-surrounded by a plasma membrane, use DNA to store genetic material, contain cytoplasm, and obtain energy and nutrients from their environment Describe phospholipid molecules. - ....ANSWER ...-have hydrophilic "heads" and hydrophobic "tails" and that they arrange into a double layer when surrounded by water What are the functions of the proteins in the phospholipid bilayer? ....ANSWER ...-They can have various functions depending on their structure, including transporting proteins (i.e. channel or carrier proteins), receptor proteins, and recognition proteins What is the function of the plasma membrane? - ....ANSWER ...-Plasma membranes have selective permeability, allowing certain molecules to pass but not others Compare and contrast the two main forms of cells. - ....ANSWER ...-Prokaryotic: smaller, simpler, lack a nucleus, lack all organelles besides ribosomes. Eukaryotic: larger, more complex, have a nucleus and membrane-bound organelles Bacterial and archaea are which type of cell? - ....ANSWER ...-Prokaryotic cells …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1