Biol2200 Questions & Answers Solved 100% Correct!

Phospholipid bilayers are NOT stabilised by: a. van der Walls forces b. covalent bonds c. hydrogen bonds d. ionic bonds e. hydrophobic interactions - Answer-b. covalent bonds A transmembrane protein has the following properties: it has two binding sites, one for solute A and one for solute B. The protein can undergo a conformational change to switch between two states: either both binding sites are exposed exclusively on one side of the membrane, or both are exposed exclusively on the other side of the membrane. The protein can switch between the two conformational states only if both binding sites are occupied or if both binding sites are empty, but cannot switch if only one binding site is occupied. What kind of binding site do these properties define? a. uniporter b. ion channel c. aniporter rter - Answer-d. symporter Place the following processes involved golgi ribbon formation following mitotic exit in the correct sequence. Microtubule clustering of golgi membranes at the peri-nuclear region. Formation of golgi mini-stacks. Golgin tethering of golgi membranes. Golgi membrane fusion using a SNARE-like mechanism. - Answer-Formation of golgi mini-stacks. Microtubule clustering of golgi membranes at the peri-nuclear region. Golgin tethering of golgi membranes. Golgi membrane fusion using a SNARE-like mechanism. In the transfer of electrons between two molecules, the molecules that lose electrons is said to be _____________. - Answer-oxidized Secretory cargo is packaged and leaves the golgi apparatus at the _____________ face. - Answer-trans Which of the following statements BEST describes protein tertiary structure ? - Answer-The folding of a single subunit of actin into a globular structure. A cisternal, sheet-like architecture best describes the ____________ endoplasmic reticulum, - Answerrough Invaginations of the inner mitochondrial memrbane are known as _________________. - Answer-cristae Which of the following is NOT an example of a protein post-translational modification?Proteolysis Calcium-calmodulin binding Ubiquitination Nitrosylation Glycosylation. Methylation - Answer-Calcium-calmodulin binding