6 Which aucleic acid, DNA or RNA, performs each function? (a) Helps with protein synthesis in a cell. (b) Stores information responsible for all inherited traits in all eukaryotes and prokaryotes (c) Stores information responsible for all inherited traits in some viruses.

Which of these is not a macromolecule? a) Ala b)  protein  c)  polysaccharide   d)  nucleic acid The site of translation is the a) nucleus b)   ribosomes  c)  lysosomes    d)    mitochondria Which of these pairs of molecules dissolved in water not produce a buffer solution? a) HF and NaF    b)  NH3 and NH4Cl   c)  CH4 and H2O    d)  NaH2PO4 and Na2HPO4 The soap-water-oil mixture that you made in your amphipathic home lab exercise may be best described as: a) an amphipathic substance b) a hydrophilic substance   c)  a hydrophobic substance  d)  an emulsion Which of these amino acids would have a negative charge at pH 7.0? a) Lys b)  Asp   c)  Met   d)  Gly Which of these amino acids has two nitrogen atoms in its structure? a) Lys   b)  Arg   c)  Tyr   d)  Val Beta sheets are an example of: a) primary structure b)  secondary structure   c)  tertiary structure   d)  quaternary structure Folding in myoglobin are an example of: a) primary structure b)  secondary structure   c)  tertiary…

Q48

63.  Which of the following statements is/are true about collagen?   a)  It gives epithelial layers tensile strength and allows them to stretch.   b)  It requires hydroxylation of particular amino acids post-translationally.   c)  It is present in different epithelial cell types in different forms, such that it serves as a usual marker for the origin of difference cancers.   d)  a and c   e)  a, b and c