Cell Bio Final_ Exam 1 _2019 Flashcards
1
Q
- Which of the following is a tenet of the Cell Theory?
1) All organisms are composed of one or more cells
2) The Cell is the structural unit of life.
3) Cells can arise only by division from a preexisiting cell
4) Cells divide only by fission
A
C: 1 + 2 + 3
2
Q
- Which of the following description of embryonic stem cells is wrong_____?
A. They are undifferentiated cells
B. They are capable of self-renewal
C. They are capable of giving rise to other kind of cells
D. They can differentiate into only two or several mature cell types in the body
E. They can be used for the cell replacement therapy
A
D: They differentiate into only two or several mature cell types in the body
3
Q
3. The process by which a relatively unspecialized cell becomes highly specialized is called \_\_\_\_\_\_\_\_. A. Differentiation B. Determination C. Degeneracy D. Denaturation E. Renaturation
A
A: Differentiation
4
Q
- Which property of the plasma membrane enables H20 to pass through it freely but glucose cannot?
A. Provide the cell extensive Scaffold for biochemical activities
B. Possess machinery for physically transporting substances across the membrane
C. Providing a selectively permeable barrier
D. Membranes mediate recognition and interaction between adjacent cells
E. None of the above
A
C: Providing a selectively permeable barrier
5
Q
- What are the determinants of diffusion rate for a nonelectrolyte during simple diffusion procedure _______?
1) A concentration gradient
2) Permeability
3) Polarity of the nonelectrolyte molecule
4) Size of the nonelectrolyte molecule
A
E: 3 +4
6
Q
6. An artificially-prepared aspherical vesicle composed of a lipid bilayer is referred as: A. Lipid raft B. Liposome C. Lipid vesicle D. Lipid vacuole E. None of the above
A
B: Liposome
7
Q
7. An important mechanism of transportation by transporter proteins is through \_\_\_\_\_\_. A. Conformational change B. Concentration gradient C. Specific binding D. Consumption of energy E. Secondary active transport
A
A: Conformational change
8
Q
8. A channel that opens in response to charge gradient is called a \_\_\_\_\_\_\_. A. Voltage-gated channel B. Charge-gated channel C. Ligand- gated channel D. Positive- gated channel E. Electric- gated channel
A
A: Voltage-gated channel
9
Q
- Lipid composition differs among different types of cellular membranes. This difference can be due to ______.
1) Types of lipids
2) Nature of the head groups
3) Particular species of fatty acyl chains
A
D: 1 + 2 + 3
10
Q
10. In the Na+/ glucose cotransporter, \_\_\_\_\_ moving down its gradient drives the transport of \_\_\_\_ against its gradient. A. Na + ions, K + ions B. Na + ion, glucose C. Glucose, Na+ ions D. Glucose, K+ ions E. K+ ions, glucose
A
B: Na + ion, glucose
11
Q
11. Which of the following ECM components provide to compression forces for cells ? A. Collagen B. Proteoglycan C. Fibronectin D. Fibrinogen E. Glycocalyx
A
B: Proteoglycan
12
Q
12. The NaCl concentration inside an animal cell is about 0.7%. When you put this cell into a beaker with 5 % NaCl solution, what will happen to the cell? A. Swollen B. Turgor pressure increases C. Shrink D. Plasmolysis E. No charge
A
C: Shrink
13
Q
13. What substance joins proteoglycans together into gigantic complexes called proteoglycan aggregates? These complexes can occupy very large volumes. A. Hyaluronidase B. Hyaluronic acid C. Proteoglycase D. Fibronectin E. Laminin
A
B: Hyaluronic acid
14
Q
14. For some cell types, there is a protecting cover outside of the plasma membrane formed by carbohydrate chains of glycoproteins and glycolipids projecting out of the plasma membrane, what is the name for this protecting cover? A. Glycoprotein B. Glycocalyx C. Proteoglycan D. Basement membrane E. Extracellular matrix
A
B: Glycocalyx
15
Q
15. All of the following proteins are components for extracellular matrix, except for \_\_\_\_\_\_. A. Collagen B. Proteoglycan C. Fibronectin D. Selectin E. Laminin
A
D: Selectin
