Review Quizzes

Chapters 1-5

Review Quizzes

Chapters 1-5

1.Which of the following constitutes the quarternary level of protein structure?a. bonding between side chains of amino acidsb. sequence of amino acids joined by peptide bondsc. beta pleated sheetd. interactions between polypeptide subunitse. alpha helix

1.Which of the following constitutes the quarternary level of protein structure?a. bonding between side chains of amino acidsb. sequence of amino acids joined by peptide bondsc. beta pleated sheetd. interactions between polypeptide subunitse. alpha helix

2. Which of the following nitrogenous bases is NOT found in DNA?a. adenineb. guaninec. uracild. thyminee. cytosine

2. Which of the following nitrogenous bases is NOT found in DNA?a. adenineb. guaninec. uracild. thyminee. cytosine

3. Many of the unique physical properties of water may be explained bya. its polar natureb. its low surface tensionc. its ability to easily dissolve nonpolar substancesd. its low pHe. its ability to contract when it freezes

3. Many of the unique physical properties of water may be explained bya. its polar natureb. its low surface tensionc. its ability to easily dissolve nonpolar substancesd. its low pHe. its ability to contract when it freezes

4. Which of the following statements about enzymes is NOT true?a. enzymes are almost always proteinsb. enzyme activity is affected by changes in pHc. enzymes increase the rate of reactionsd. enzymes increase the activation energye. enzymes do not change the free energy of products

4. Which of the following statements about enzymes is NOT true?a. enzymes are almost always proteinsb. enzyme activity is affected by changes in pHc. enzymes increase the rate of reactionsd. enzymes increase the activation energye. enzymes do not change the free energy of products

5. In one type of enzyme regulation, the presence of the end product of a metabolic pathway inhibits an enzyme which functions in an early step in the pathway. This type of enzyme regulation is calleda. feedback inhibitionb. competitive inhibitionc. non-competitive inhibitiond. irreversibly inhibitione. none of the above

5. In one type of enzyme regulation, the presence of the end product of a metabolic pathway inhibits an enzyme which functions in an early step in the pathway. This type of enzyme regulation is calleda. feedback inhibitionb. competitive inhibitionc. non-competitive inhibitiond. irreversibly inhibitione. none of the above

6. Which of the following involves the binding of a molecule to the active site of the enzyme?a. non-competitive inhibitionb. allosteric inhibitionc. competitive inhibitiond. a, b, and ce. None of the above

6. Which of the following involves the binding of a molecule to the active site of the enzyme?a. non-competitive inhibitionb. allosteric inhibitionc. competitive inhibitiond. a, b, and ce. None of the above

7. If the free energy change of a reaction is greater than zero, then the reactiona. is spontaneousb. is nonspontaneousc. is at equilibriumd. is endothermice. is exothermic

7. If the free energy change of a reaction is greater than zero, then the reactiona. is spontaneousb. is nonspontaneousc. is at equilibriumd. is endothermice. is exothermic

8. Which is NOT a characteristic of proteins?a. can function as an enzymeb. peptide bondsc. important in cell signalingd. may be used as an energy sourcee. contain nitrogenous bases

8. Which is NOT a characteristic of proteins?a. can function as an enzymeb. peptide bondsc. important in cell signalingd. may be used as an energy sourcee. contain nitrogenous bases

9. Which of the following are TRUE regarding enzymes?a. altering the three dimensional structure of an enzyme disrupts its activityb. each enzyme is specific for a given reactionc. hydrophobic, ionic, and hydrogen bonds play a role in binding substrated. all of the above

9. Which of the following are TRUE regarding enzymes?a. altering the three dimensional structure of an enzyme disrupts its activityb. each enzyme is specific for a given reactionc. hydrophobic, ionic, and hydrogen bonds play a role in binding substrated. all of the above

10. Which of the following organic molecules is a major storage carbohydrate used to store energy in plants?a. celluloseb. maltosec. fructosed. starche. glycogen

10. Which of the following organic molecules is a major storage carbohydrate used to store energy in plants?a. celluloseb. maltosec. fructosed. starche. glycogen

11. A solution with a pH of 10 is how many times more basic than a solution with a pH of 8?a. 2b. 4c. 10d. 100e. 1000

11. A solution with a pH of 10 is how many times more basic than a solution with a pH of 8?a. 2b. 4c. 10d. 100e. 1000

12. The conversion of lactose (a disaccharide) to glucose and galactose (monosaccharides) involves the addition of which of the following species to the lactose molecule?a. O2

b. H2

c. ATPd. H2O

e. NADH

12. The conversion of lactose (a disaccharide) to glucose and galactose (monosaccharides) involves the addition of which of the following species to the lactose molecule?a. O2

b. H2

c. ATPd. H2O

e. NADH

13. Which of the following is NOT present in an animal cell?a. nucleusb. mitochondriac. cell walld. DNA e. ribosomes

13. Which of the following is NOT present in an animal cell?a. nucleusb. mitochondriac. cell walld. DNA e. ribosomes

14. All of the following organelles are associated with protein synthesis EXCEPTa. ribosomesb. Golgi bodiesc. the nucleusd. the rough endoplasmic reticulume. the smooth endoplasmic reticulum

14. All of the following organelles are associated with protein synthesis EXCEPTa. ribosomesb. Golgi bodiesc. the nucleusd. the rough endoplasmic reticulume. the smooth endoplasmic reticulum

15. A major difference between bacterial cells and animal cells is that bacterial cells havea. a plasma membrane made of phospholipidsb. ribosomes, which are involved in protein synthesisc. a cell wall made up of peptidoglycand. a nuclear membrane, which contains chromosomese. a large vacuole, which contains fluids

15. A major difference between bacterial cells and animal cells is that bacterial cells havea. a plasma membrane made of phospholipidsb. ribosomes, which are involved in protein synthesisc. a cell wall made up of peptidoglycand. a nuclear membrane, which contains chromosomese. a large vacuole, which contains fluids

16. All of the following are methods of moving materials across cell membranes without the expenditure of energy EXCEPT a.facilitated transportb. osmosisc. active transportd. diffusion

16. All of the following are methods of moving materials across cell membranes without the expenditure of energy EXCEPT a.facilitated transportb. osmosisc. active transportd. diffusion

a. hydrogen bondb. peptide bondc. glycosidic bondd. ester bonde. amino group

17. weak bond formed between polar molecules

18. bond linking two monosaccharides in glycogen

19. the connecting –CO-NH bond in an organic molecule

20. bond that links a fatty acid to a glycerol molecule

21. basic functional group of organic molecules

A

C

B

D

E

a. smooth ERb. lysosomec. cell walld. microtubulee. nucleolus

22. vesicles that serve to break down cellular debris

23. a semi-rigid structure that lends support to a cell

24. a channel inside the cytoplasm that is the site of lipid synthesis

25. a polymer of the protein tubulin that is found in cilia, flagella, and spindle fibers

26. site at which rRNA is formed

B

C

A

DE

a. osmosisb. facilitated diffusionc. exocytosisd. endocytosise. active transport

27. fusion of a vesicle with the cell membrane; contents are released outside cell

28. movements of dissolved particles against the concentration gradient

29. movement of dissolved particles through membrane proteins with the concentration gradient

C

E

B

30. When materials pass into and out of a cell at equal rates and there is no net change in the concentration inside the cell, the cell is in a state ofa. fluxb. inertiac. panicd. dynamic equilibrium

30. When materials pass into and out of a cell at equal rates and there is no net change in the concentration inside the cell, the cell is in a state ofa. fluxb. inertiac. panicd. dynamic equilibrium

a. nucleusb. Golgi apparatusc. lysosomed. plasma membranee. endoplasmic reticulum

31. semipermeable cell barrier

32. present in prokaryotic cell 33. modifies and packages

protein for secretion

D

D

B