Why are biological macromolecules considered organic?

Which of the following levels of protein structure can involve covalent bond formation? A) Primary B) Secondary C) Teritary D) Quaternary E) Primary and teritary F) Primary, teritary and quaternary

What functions do proteins perform in a cell?

When phospholipids are carefully mixed with water they are observed to exhibit which of the following properties? a) Spontaneous organization into stable structures within the water environment, b) Orientation of the Phosphate parts of the molecule away from fatty acid (non-polar) environment of a bilayer, c) Hydrophilic orientation of the ionic section of the phospholipid molecules to the polar portions of the water molecules, d) All are true, e) None are true.

What type of bonds/forces stabilize protein secondary structure? A) ionic (electrostatic) B) hydrogen bonds C) hydrophobic forces D) A and C O E) A, B and C

Several substances found in nature or within living organisms themselves are essential to the life. Thus, for each of the following substances, please give a concrete example briefly describing how their properties make them essential to life. A) Acid (pH below 7) B) Lipid

Carbons is used in cells for  a) forming the charge across the membrane by serving a positive cations b) as the structural backbone of most molecules c) forming the second most common element  D) none of these

DNA is composed of which are attached to each other by bonds. O A) nucleotides. phosphodiester O B) amino acids.. peptide C) monosaccharides. glycosidic O D) nucleotides. hydrogen O E) amino acids.. hydrogen

Which of the following is an example of secondary protein structure?A) DipeptideB) TriglycerideC)α -helixD) Amino acidE) Fatty acid

What's the key distinction between glycoproteins and metalloproteins?