MOOC 细胞生物学(刘文华王帆)(汕头大学)1451567222 最新慕课完整章节测试答案

Biomembrane Structure-test

1、单选题：
All the following statements describe biomembranes except:‌‌‌
选项：
A: Different biomembranes may contain different proportions of the same phospholipids.
B:  The two leaflets of a biomembrane may contain different phospholipids.
C:  Some biomembranes have free edges.
D: Some phospholipids and cholesterol may cluster to form lipid rafts.  
答案: 【  Some biomembranes have free edges.】

2、单选题：
​ The major site of lipid synthesis in eukaryotic cells is the‎
选项：
A: Nucleus
B: Endoplasmic reticulum
C: Mitochondria
D: Cell membrane
答案: 【 Endoplasmic reticulum】

3、单选题：
Phospholipids with short or unsaturated fatty acyl chains‍‍
选项：
A: decrease membrane fluidity.
B: increase membrane fluidity.
C:  cause biomembranes to become thicker
D: allow hydrophilic molecules to diffuse across the lipid bilayer.
答案: 【 increase membrane fluidity.】

4、单选题：
 The _______ are transmembrane proteins.‌‌
选项：
A: lipid-anchored membrane proteins
B: integral membrane proteins
C: peripheral membrane proteins
D: extracellular matrix proteins
答案: 【 integral membrane proteins】

5、单选题：
Glycolipids and glycoproteins are especially abundant in the​
选项：
A:  nucleus.
B: mitochondrial inner membrane
C: cytosol
D: plasma membrane
答案: 【 plasma membrane】

6、单选题：
Phosphate containing lipids include all of the following except ‌
选项：
A:  phospholipids.
B: sphingolipid
C: triglyceride
D: phosphatidylinositol
答案: 【 triglyceride】

7、判断题：
‍A lipid bilayer is the fundamental structural component of all cell membranes.‌‍‌
选项：
A: 正确
B: 错误
答案: 【 正确】

8、判断题：
‌Maintenance of the lipid bilayer in the plasma membrane requires special enzymes and the hydrolysis of ATP.‌‌‌
选项：
A: 正确
B: 错误
答案: 【 错误】

9、填空题：
‏The most abundant lipids in cell membranes are ________________.‏‏‏
答案: 【 phospholipids】

10、填空题：
​Sugar-containing lipids called ____________ are found only in the outer half of the bilayer and their sugar groups are exposed ac the cell surface.‍​‍
答案: 【 glycolipids】

Culturing and visualizing cells-test

1、单选题：
 The most direct source of monoclonal antibodies are ________ cells.‎​‎
选项：
A: B lymphocytes
B: T lymphocytes
C: myeloma
D: Hybridoma
答案: 【 Hybridoma】

2、单选题：
The fluorescent properties of dyes such as FITC can provide information on the‏‏‏‍‏
选项：
A: location of specific proteins.
B: concentration of  ions in specific regions of the cell.
C: the amount of  DNA in a cell.
D: volume of a cell.
答案: 【 location of specific proteins.】

3、单选题：
What factors necessary for growth of animal cells in culture are provided by serum? ‏
选项：
A: amino acids
B: precursors of DNA synthesis
C: growth factors
D: vitamins
答案: 【 growth factors 】

4、单选题：
What is the advantage of using GFP-tag to visualize specific proteins, instead of staining cells with fluorescent dyes that bind to the target protein?​​