If radioactive guanine is added to the growth medium of cells, which macromolecules will be florescent/labeled? D. DNA E. Both DNA and RNA A. Protein B. Carbohydrates C. RNA

Which of the following are the main structural components of the lipid bilayer of all cell membranes?   A. Phospholipids   B. Waxes   C. Triglycerides   D. Steroids

You are working with cells that have an internal solute concentration of 5mM solute. This solute is large and ionized. You place them in a medium that has a concentration of 7.7 mM solute. What will happen? a. The cells will swell initially, then return to their original size. b. The cells will shrink in size. c. I do not expect anything to happen. d. The cell will burst.

which protein consists mainly of a helixes  a. hemoglobin     d collagen b cotton               e silk fibroin c nylon

Which exchange resin can be used to separate two tripeptides (MDEA and CKRF)?A. Both B and C B. Anion exchange resins C. Cation exchange resins. D. None of the above

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

18. Which of the following entities has the largest interaction cross-section (most likely to interact) when bulk biological tissue is irradiated with ionizing radiation? A. Lipid B. Nucleic acid C. Protein D. Sucrose

A useful method for studying membrane proteins in place in the membrane is   a. nuclear magnetic resonance   b. treatment with mercaptoethanol   c. x-ray crystallography   d. treatment with detergents