Choose the right answers Question 1 The cytoskeleton of the eukaryotic cell includes which type of structures and protein? A- intermediate filaments made of actin B- microtubules made of actin filaments C- microfilaments made of tubulin D- microfilaments made of actin

Question 4 An N-linked glycoprotein contains a glycan covalently linked to which specific amino acid in a protein? Serine ● Asparagine Glutamine Threonine Question 5 Membrane-bound ribosomes synthesize proteins that are destined to the following organelles, EXCEPT lysosomes endosomes secretory vesicles mitochondria Question 6 Which molecular chaperone associates with ribosomes to prevent improper folding of polypeptide as they are being synthesized? O Chaperonins Hsp 40 O Hsp 90 Trigger factor

Question  7

QUESTION 38 What is responsible for degrading misfolded proteins in the cytoplasm? OA. Peroxisome B. Proteosome OC. Endosome O D. Lysosome QUESTION 39 What is the primary function of molecular chaperones? OA. They transport secretory proteins into secretory vesicles. OB. They bind to glycosylases to assist in proper protein glycosylation in the Golgi. OC. They bind only to misfolded proteins to help them obtain their proper tertiary structure. OD. They bind proteins only after translation is complete to help them to fold into their proper primary structure. O E. They bind to unfolded or misfolded RNAs and help them attain their proper tertiary structure. QUESTION 40 Which sequence(s) would a protein need to be translated, targeted to the ER, and retained in the ER as an ER-resident protein? A. signal peptide sequence and KDEL sequence OB. Nuclear localization signal and signal peptide sequence OC. Nuclear localization signal and KDEL sequence OD. Signal peptide

Question 5 Which of these is an example of active transport? Movement of sodium ions through a channel protein Movement of hydrogen ions against their concentration gradient though a protein pump Movement of water through the phospholipid bilayer Movement of a hormone through the phospholipid bilayer Movement of glucose down its concentration gradient through a carrier protein. Question 6 Which of these organelles does not have a membrane made of phospholipids? lysosome endoplasmic reticulum ribosome nucleus Golgi apparatus O O