61
Which one of the following statements is true for actin?
A)
Actin filament is structurally polarized, and the two ends are not identical
B)
De novo actin polymerization is a single-step process
C)
The pointed end of the actin filaments is the fast-growing end
D)
Actin forms spindle fibers during mitosis
Answer & Solution
Answer: Option
A
62
Choose the correct signal transduction pathway.
A)
Hormone → 7 TM receptor → G protein → cAMP → PKA
B)
Hormone → G protein → 7 TM receptor → cAMP → PKA
C)
Hormone → 7 TM receptor → G protein → PKA → cAMP
D)
Hormone → 7 TM receptor → cAMP → G protein → PKA
Answer & Solution
Answer: Option
A
63
A mutant Ga protein with increased GTPase activity would
A)
Not bind to GTP
B)
Not bind to GDP
C)
Show increased signaling
D)
Show decreased signaling
Answer & Solution
Answer: Option
D
64
Match the organelles in
Group I with their functions in
Group II .
Group I Group II
P. Lysosome
1. Digestion of foreign substances
Q. Smooth ER
2. Protein targeting
R. Golgi apparatus
3. Lipid synthesis
S. Nucleolus
4. Protein synthesis
5. rRNA synthesis
A)
P-1, Q-3, R-2, S-5
B)
P-1, Q-4, R-5, S-3
C)
P-2, Q-5, R-3, S-4
D)
P-1, Q-3, R-4, S-5
Answer & Solution
Answer: Option
C
65
Chromosomes counting is best done during
A)
Telophase
B)
Late prophase
C)
Late anaphase
D)
Metaphase
Answer & Solution
Answer: Option
D
66
Match the entries in
Group I with those in
Group II .
Group I Group II
P. MTT
1. Dihydrofolate reductase
Q. Annexin V
2. Succinate dehydrogenase
R. Methotrexate
3. Microtubules
S. Taxol
4. Phosphatidylserine
A)
P-3, Q-1, R-4, S-2
B)
P-2, Q-4, R-1, S-3
C)
P-2, Q-3, R-4, S-1
D)
P-4, Q-2, R-1, S-3
Answer & Solution
Answer: Option
B
67
Beta oxidation pathway of fatty acid oxidation resembles
A)
Krebs cycle
B)
Glycolysis
C)
ETS (electron transport system)
D)
Calvin cycle
Answer & Solution
Answer: Option
A
