Which of the following proteins will CERTAINLY have quaternary structure? Select one: a. autophagy b. a protein that contains nickel c. an enzyme with two domains d. a homodimer e. lysosome

Which of the following is FALSE about spliceosomes? a. In eukaryotic cells are present in the nucleus.   b. Are about the size of a ribosomal subunit.   c. In bacteria, are present in the cytoplasm.   d. Contain RNA and protein.

Which of the following compounds can diffuse through the lipid bilayer of a cell membrane? Select all that apply.     A. Large polar molecules   B. Gases and hydrophobic molecules   C. Ions   D. Small polar molecules like water

The model below shows a chemical reaction that takes place in cells. B Which statement correctly describes the details of the reaction shown above? A A polymer is built from monomers as water is removed. U HO-1 2 3 с HO- 1 2 3 H HO D H₂O A lipid polymer is built from monomers as water is removed. A polymer is hydrolyzed into its component monomers as water is added. Adhesion is occurring between water molecules. -H

What is the purpose of each of the following ingredients when present in an homogenization buffer for isolating organelles? a. EDTA b. PVP or PVPP c. BSA d. sucrose