2021 细胞生物学(刘文华-王帆)(汕头大学)1463286553 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-02-25到2021-07-01
本篇答案更新状态:已完结

Introduction of Molecular cell biology Cell theory-test

1、 问题:What did Leeuwenhoek do?
选项：
A: Looked at cork
B:Stated that plants are made of cells
C: Stated that animals are made of cells
D:Used simple light microscope and saw microorganisms
答案: 【Used simple light microscope and saw microorganisms】

2、 问题:He discovered that all animals were made of cells, which contributed to the development of the cell theory:
选项：
A:A.van Leeuwenhoek
B: Robert Hooke
C: Zacharias Jansse
D:Theodor Schwann
答案: 【Theodor Schwann】

3、 问题:Who was the first person to see cells under the microscope and give them a name?
选项：
A:A.van Leeuwenhoek
B:Robert Hooke
C:Theodor Schwann
D:Zacharias Jansse
答案: 【Robert Hooke】

4、 问题:Which of the following is NOT one of the main components of the cell theory?
选项：
A:cells must contain DNA
B: all living things are made of cells
C:cells can only come from other cells
D:cells are the basic unit of life
答案: 【cells must contain DNA】

Biomembrane Structure Biomembrane Structure-test

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

7、 问题: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、 问题: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、 问题:The most abundant lipids in cell membranes are ____.
答案: 【phospholipids】

10、 问题: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】

Transmembrane transport of Ions and small molecules

1、 问题:Classes of membrane transport proteins include all of the following except
选项：
A:ATP-powered pumps.
B:ion channels.
C:protein translocons.
D:transporters.
答案: 【protein translocons.】

2、 问题:The glucose uniporter GLUT1 has a Km of 1.5 mM for D-glucose and 30 mM for D-galactose. At a concentration of 5 mM for each, what is the rate of glucose transport relative to galactose transport? The Vmax may be assumed to be the same for both.
选项：
A:3.7-fold slower
B:equal
C:5.5-fold faster
D:20-fold faster
答案: 【5.5-fold faster】

3、 问题:How does uniport transport compare to simple diffusion?
选项：
A:Similar to simple diffusion, uniport transport is nonspecific
B:Uniport transport is slower but more specific than simple diffusion
C:Uniport transport is much faster and more specific than simple diffusion.
D:Simple diffusion is reversible but uniport transport is not.
答案: 【Uniport transport is much faster and more specific than simple diffusion.】

4、 问题:Which of the four classes of ATP-powered pumps share overall similarity: several subunits, the same general organization, and a similar function in being H+ transporters?
选项：
A:ABC superfamily and P-class pumps
B: ABC superfamily and P-class pump
C: F-class pumps and P-class pumps
D:F-class pumps and V-class pumps
答案: 【F-class pumps and V-class pumps】

5、 问题:How does inhibition of the Na+/K+ ATPase increase the force of heart muscle contraction?
选项：
A:It increases cytosolic Na+ and therefore decreases Ca2+ export
B:It increases cytosolic K+ and therefore decreases Ca2+ export.
C:It decreases cytosolic Na+ and therefore decreases Ca2+ export
D: It decreases cytosolic K+ and therefore decreases Ca2+ export.
答案: 【It increases cytosolic Na+ and therefore decreases Ca2+ export】

6、 问题:Channel proteins (such as the voltage-gated Na channel) transport ions much faster than carrier proteins (such as the Na-K pump), but they cannot be coupled to an energy source; therefore, transport mediated by channels is always passive.
选项：
A:正确
B:错误
答案: 【正确】

7、 问题:The resting membrane potential of a typical animal cell arises predominantly through the action of the Na-K pump, which in each cycle transfers 3 Na ions out of the cell and 2 K into the cell, leaving an excess of negative charges inside the cell.
选项：
A:正确
B:错误
答案: 【错误】

8、 问题: The concentration gradient for a charged solute and the membrane potential constitute the _______ gradient for that solute.
答案: 【electrochemical】

9、 问题:Over expression of the ____ in human cancer cells can make these cells simultaneously resistant to a variety of chemically unrelated cytotoxic drugs that we widely used in cancer chemotherapy.
答案: 【Multidrug-resistance transport protein】

10、 问题:In the epithelial cells of the gut Na+-linked symporters in the apical (absorptive) domain of the plasma membrane and Na+-independent transport proteins in the basolateral domain bring about the _______ of absorbed solutes.
答案: 【Transcellular transport】

Moving Proteins into Membranes and Organelles

1、 问题:Type I membrane proteins have all of the following properties except
选项：
A:internal signal-anchor sequence
B:cleavable signal sequence
C: internal stop-transfer sequence
D: N-out, C-in topology.
答案: 【internal signal-anchor sequence】

2、 问题: Many peroxisomal matrix proteins are imported as
选项：
A:folded proteins
B: nascent chains in the process of completing their elongation
C:protein fragments that are spliced together within the peroxisome.
D:unfolded proteins
答案: 【folded proteins】

3、 问题:GPI-anchoring serves a special function, especially in polarized epithelial cells because this modification serves to target proteins to the