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What is the cellular mechanism by which adhesiveness of the substrate promotes neurite outgrowth?
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- In what way does the action of the membrane attack complexresemble the action of perforin?What is the likely function of the cytosolic cAMP in this transduction pathway? Question 16 options: a) It is a competitive inhibitor of the protein kinase. b) It is a hormone. c) It is a messenger RNA. d) It is a coenzyme. e) It is a second messenger.Which of the following is CORRECT? A) Pyruvate kinase requires Mg2+ for maximal activity. B) A small change of ATP concentrations within a cell leads to large changes of AMP concentrations. C) A reduction of ATP concentrations will ultimately raise pyruvate kinase activity. D) All of the above. E) None of the above.
- What limits the activity of intracellular mediators, such ascGMP, and phosphorylated proteins?Which of the following occurs by active transport A)transport of Na+ from region of higher concentration through a region of lower concentration through a channel B) simple didfussion of a steroid hormone through the plasma memebrane C) Faciltated diffusion of Cl- down it's concentration gradient D) Transport of K+ across the plasma memebrane using cellular ATPWhat is the cell found in tissues where the hormone produced leaves behind a C peptide during proteolytic activation?
- A)Carrier of the activated amino acids to the ribosomes for incorporation into the growing peptide chain. B)Molecule that attaches to myosin and actin during muscle contraction. C)The reduced cofactor important in the TCA cycle and used in the last part of respiration. Please identify the terms.Comparing cells synthesizing secretory proteins and cells secreting steroid hormones, the cells synthesizing the steroid hormones have: A) more rough ER. B) more smooth ER C) equal amounts of smooth and rough ER D) equal amounts of smooth and rough ER, but more lysosomes. E) equal amounts of smooth and rough ER, but fewer lysosomes.PDHC is an enzyme complex consisting of 3 different enzymes. Which of the following processes regulate the activity of PDH Complex? (multiple answers) A) Phosphorylation/Dephosphorylation of E1 B) High levels of cAMP C) Acetylation/Deacetylation of E1 D) High NADH/NAD+ ratio E) High NAD+/NADH ratio