Formative Mock

Question 1

9. Which type of fibrous joint does the slightly flexible periodontal ligament (PDL) bind cementum and
alveolar bone?
Select one:
a. Gomphosis
b. Suture
c. Symphesis
d. Synchondrosis
e. Syndesmosis

Answer 1

a. Gomphosis

Question 2

10. Fluidity of the phospholipid bilayer is decreased by which one of the following?
    Select one:
    a. long chain fatty acids
    b. reduced hydrocarbon chain interaction
    c. increased amount of unsaturated fatty acids
    d. low cholesterol content
    e. all of the above

Answer 2

a. long chain fatty acids

Question 3

11. The cillary action of the cells lining the lumen of the fallopian tube are responsible for transporting an
egg from the ovaries to the uterus. Which cytoskeleton structures are linked to this movement?
Select one:
a. Intermediate filaments
b. Flagella
c. Microtubules
d. Microfilaments
e. Pili

Answer 3

c. Microtubules

Question 4

12. Which one of the following is a major determinant of the primary structure of a protein?
Select one:
a. Covalent bonding
b. Hydrogen bonding
c. Hydrophobic forces
d. Ionic interactions
e. Van Der Waals forces

Answer 4

a. Covalent bonding

Question 5

16. Given these zones within the epiphyseal plate:
17. zone of calcification
18. zone of hypertrophy
19. zone of proliferation
20. zone of resting cartilage
    Arrange them in the correct order, from the diaphysis to the epiphysis.
    Select one:
    a. 1,2,3,4
    b. 1,3,4,2
    c. 2,4,1,3
    d. 3,2,1,4
    e. 4,3,2,1

Answer 5

a. 1,2,3,4

Question 6

18. Which one of the following is INCORRECT concerning how signalling through cAMP-mediated 2nd
    messengers is switched off ?
    Select one:
    a. Action of phosphodiesterase on cAMP
    b. Adenylate cyclase is inactivated by Protein kinase A
    c. GTP bound to the a G-protein subunit is hydrolysed to GDP
    d. G-protein subunits reassociate
    e. Ligand dissociates from receptor

Answer 6

b. Adenylate cyclase is inactivated by Protein kinase A

Question 7

19. Which of the following statement concerning adult stem cells is correct?
    Select one:
    a. Actively divide for a long period of time
    b. Maintain tissue during homeostasis
    c. Are differentiated cells
    d. Are abundant in specific organs and tissues
    e. All of the above

Answer 7

b. Maintain tissue during homeostasis

Question 8

24. Which one of the following best describes the concept of homeostasis?
    Select one:
    a. Includes the concept of an error signal
    b. Refers to maintaining physiological functions in a stable condition
    c. Refers only to the regulation of body temperature
    d. a and b are both correct
    e. b and c are both correct

Answer 8

d. a and b are both correct

Question 9

25. Which one of the following sets of ribs do not have a direct attachment of their costal cartilage to the
sternum?
Select one:
a. Eight to ten
b. Eight to twelve
c. Eleven and twelve
d. Nine and ten
e. Ten to twelve

Answer 9

a. Eight to ten

Question 10

26. A blistering disease resulting from a genetic defect in a component of desmosomes will have which one of
    the following effects on the skin?
    Select one:
    a. A decrease in the elasticity of the skin
    b. A decrease in the water permeability of the skin
    c. Separation of the epidermis from the dermis
    d. Separation between the layers of keratinocytes in the stratum spinosum
    e. Separation of the stratum corneum from the underlying layers of the epidermis

Answer 10

d. Separation between the layers of keratinocytes in the stratum spinosum

Question 11

27. Levels of which one of the following allosteric modifiers would be most effective at activating
phosphofructokinase I (PFK-I) ?
Select one:
a. High level of ATP
b. High level of citrate
c. High level of NAD+
d. Low levels of AMP
e. Low level of fructose 2,6 bisphosphate

Answer 11

e. Low level of fructose 2,6 bisphosphate

Question 12

28. Which one of the following descriptions best describes the concept of a threshold potential?
    Select one:
    a. the membrane potential that exists when the cell is at rest
    b. the membrane potential that is slightly less negative than resting membrane potential
    c. the membrane potential that is slightly more negative than resting membrane potential
    d. the membrane potential represented by the peak of the action potential
    e. the membrane potential between the 0mV and the peak amplitude of the action potential

Answer 12

b. the membrane potential that is slightly less negative than resting membrane potential