A Microtubules will rapidly disassemble in response to a drop in the ATP concentration.   B G-actin monomers and alpha-tubulin/beta-tubulin dimers assemble into filaments in their ATP-bound and GTP-bound forms, respectively.   C Microtubules are stabilized by microtubule-binding proteins, such as Tau.   D Actin-binding proteins allow F-actin to assemble in cells in many different ways.   E Hydrolysis of ATP and GTP changes the conformation of the monomers once they are incorporated into actin filaments and microtubules, respectively

QUESTION 31 What type of tissue is able to generate electrical signals, force and movement? endocrine glands neurons skeletal muscle O ciliated epithelium

QUESTION 34 Which of the following events does NOT occur during ERAD (ER-associated degradation)? OA. Chaperone-mediated attempts at protein folding OB. Degradation of misfolded proteins by the proteasome OC. Targeting of mis-folded proteins to the nucleus OD. Repeated attempts at protein folding QUESTION 35 Which of the following statements regarding COPII vesicles trafficking between the ER and the Golgi is NOT correct? OA. Uncoated vesicles fuse with the cis-Golgi. OB. The vesicle enclosed in a COPII coat fuses with the cis-Golgi. OC. The COPII vesicles lose the COPII coat before reaching the Golgi. OD. COPII-coated vesicles bud off from the RER. QUESTION 36 Which phenotype would you expect to see in cells that contain a defective Rab GTPase that cannot be activated on the inner surface plasma membrane? OA. The cell would lack secretory vesicles. OB. No phenotype OC. The cell would have an excess of secretory vesicles within the cytoplasm and defective secretion. OD. The cell would…

QUESTION 7 Match the organelle to its function. Nucleus A. Synthesis of secreted proteins and addition of "core" oligosaccharides B. Sequestering and storing calcium ions (Ca2+) so that its cytoplasmic concentration remains very low; also some lipid production Rough endoplasmic reticulum Smooth endoplasmic reticulum Golgi Complex C. Processing and lengthening of oligosaccharides on proteins destined for secretion Lysosome D. Hydrolysis of macromolecules using low pH and hydrolytic enzymes Endosome E. aerobic metabolism - Mitochondria F. Compartmentalization of the chromosomes in a Eukaryotic cell; therefore the site of most RNA transcription as well as ribosome assembly 1. Chloroplast G. Sequestering reactions that have products that may be damaging to the cell and destruction of those damaging compounds Peroxisome H. Internalization of material from outside of cell e.g. for nutrition or pathogen removal I. photosynthesis