401. Which of the following statement regarding mitochondria is CORRECT?
A. The number of mitochondria per cell varies with the amount of energy required by the cell.
B. Mitochondria contain oxidative enzyme which generates ATP.
C. Mitochondria are not dependent on nuclear DNA for replication
D. Mitochondria contains its own DNA that controls mitochondrial replication
E. All of the above
402. Which of the following statement is INCORRECT?
A. Pinocytosis is an ATP & calcium dependent process.
B. Pinocytosis is the only way for the large macromolecules such as protein to enter cells
C. Phagocytosis occurs with all white cells.
D. Both pinocytosis & phagocytosis is initiated by attachment of molecules or substances to be endocytosed with cell surface receptors
E. None of the above.
403. Which of the following statements is CORRECT?
A. Cell damage causes lysosomal rupture, resulting in autolysis.
B. Lysosomal enzymes have bactericidal properties.
C. Lysosomal pH is about 5.0
D. Lysosomes are partly responsible for organ atrophy.
E. All of the above
404. Which of the following statement is INCORRECT?
A. Almost all protein entering endoplasmic reticulum becomes glycoprotein.
B. Ribosomal proteins are mostly not glycosylated
C. Rough endoplasmic reticulum synthesize cholesterol & phospholipids & incorporate them into the rough endoplasmic reticulum membrane.
D. Smooth endoplasmic reticulum contain enzymes that breakdown glycogen
E. Smooth endoplasmic reticulum contains enzyme that detoxifies drugs by oxidation, hydrolysis & conjugation with glucuronic acid.
405. Which of the following statement is FALSE?
A. Nucleoli contain DNA, RNA & ribosomal protein.
B. Exocytosis is stimulated by increased calcium influx into the cell.
C. A TP formation occurs in the mitochondria
D. ATP is formed as the by-product of conversion of glucose into pyruvic acid.
E. Each time an ATP is dephosphorylated, 12,000 calories is expended.
406. A TP function includes:
A. Membrane transport of ions
B. Promote protein synthesis by ribosomes
C. Supply energy for mechanic work such as cell motilty
D. Promotes synthesis of lipids & nucleotides
E. All of the above
407. Cells that does NOT exhibit amoeboid locomotion include:
A. Macrophages
B. Muscle cells
C. Fibroblast
D. Embryonic cells
E. All of the above
408. Which of the following statements is TRUE?
A. Ciliary movement is A TP dependent.
B. Ciliary movement is affected by extracellular concentration of calcium & magnesium
C. Respiratory mucociliary escalator moves mucus towards the pharynx at 1 cm per minute.
D. Cilia contain 9 double tubules with cross-links, forming a structure called axoneme.
E. All of the above.
409. Irreversible hypoxic myocardial cell injury occur after:
A. 3-5 min
B. 10-20 min
C. 30-40 min
D. 1-2 hours
E. 3-4 hours
410. Reperfusion of irreversibly ischemic tissue can lead to:
A. Increase oxygen free radicals influx into the cell
B. Activation of intracellular acid hydrolase
C. Further A TP depletion
D. All of the above
E. None of the above