13. Cells are anchored within the extracellular matrix in tissues. Extracellular

Question

13. Cells are anchored within the extracellular matrix in tissues. Extracellular matrix proteins, such as that collagen, are synthesized within cells and secreted to the extracellular space. Select thne o ribosomes to its release correctly identifies the path taken by collagen from when it is synthesized on from cells. A) Smooth ER->Rough ER- transport vesiclos> plasma membrane B) Rough ER-transport vesicles secretory vesicles Golgi apparatus C) Rough ER transport vesicles Golgi apparatus->secretory vesicles> plasma membrane D) Rough ER transport vesicles-> Golgi apparatus-lysosomes->plasma membrane E Nucleus Rough ERtransport vesicles>Golgi apparatus>plasma membrane 14. Which step in collular respiration produces the most ATP molecules? A) Glycolysis B) Pyruvate oxidation C) TCA cycle D) Fermentation E) Oxidative phosphorylation 15. Covalent bonds are most important in stabilizing thestructure of many proteins. A) primary B) secondary C) tertiary D) quatermary E) all of the above 6. Which of the following has the most glycosidic bonds? A) Glucose B) Sucrose C) Fructose D) Glycogern E) Galactose 17. In a chemical reacion, the standard fee energy change (AG") is calculated to be 3.67 calmol. What can be said of the chemical reaction? A) The reaction is at equilibrium under standard conditions. 8) The reaction goes spontaneously to the right under standard conditions C) The reaction is not spontaneous under standard conditions D) Products predominate over reactants at equilibrium under standard conditions E) There can be no reaction. 18. Starting with shredded spinach leaves, you follow a procedure that allows for separation of cellular organelles. You are specifically looking for the fraction that contains chloroplasts. To identify this fraction, you should test for the A) phospholipids unique to intracellular membranes B) general presence of enzymes that fix carbon dioxide C) phospholipids unique to the mitochondrial membrane D) polysaccharides that specifically surround the mitochondria E) presence of enzymes associated with cellular respiration.

Explanation / Answer

13. C. RER - Transport vesicles - Golgi apparatus - Secretory vesicles - plasma membrane

14. E. Oxidative phosphorylation

15. C. Tertiary structure
Disulphide bond makes covalent bond to stabilize the tertiary structure.
Primary structure - Peptide bond
Secondary structure - hydrogen bond

16. Glycogen
Glycogen is a polymer

17. C. The reaction is not spontaneous under standard conditions.

18. B. General presence of enzymes that fix carbondioxide.

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