- Introduction of Molecular cell biology Cell theory-test
- Culturing and visualizing cells Culturing and visualizing cells-test
- Biomembrane Structure Biomembrane Structure-test
- Transmembrane transport of Ions and small molecules
- Moving Proteins into Membranes and Organelles
- Vesicular traffic,secretion and endocytosis Vesicular traffic,secretion and endocytosis
- Cell organization and movement II： Microtubules and intermediate filament Cell organization and move
- Cell organization and movement I： Microfilaments Cell organization and movement I： Microfilament
- Cellular Energetics
- Signal transduction and G protein-coupled receptors Signal transduction
- Stem cells, cell asymmetry Ch21 Test- single answer Choice
- Signaling pathways that control gene activity Signaling pathways that control gene activity
- The Eukaryotic Cell Cycle The Eukaryotic Cell Cycle单元测验
- Cell senescence and death
1、 问题:What did Leeuwenhoek do?
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:
B: Robert Hooke
C: Zacharias Jansse
答案: 【Theodor Schwann】
3、 问题:Who was the first person to see cells under the microscope and give them a name?
答案: 【Robert Hooke】
4、 问题:Which of the following is NOT one of the main components of the cell theory?
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】
1、 问题: The most direct source of monoclonal antibodies are __ cells.
2、 问题:The fluorescent properties of dyes such as FITC can provide information on the
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、 问题:What factors necessary for growth of animal cells in culture are provided by serum?
B:precursors of DNA synthesis
答案: 【growth factors 】
4、 问题: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?
A:GFP fusions enable one to track changes in the location of the protein in living cells; staining usually requires fixed cells
B:GFP fusions enable higher resolution than staining with fluorescent probes.
C:GFP permits the position of the protein in the cell more precisely than fluorescent probes
D:GFP fusions are not subject to artifacts; fluorescent probes may introduce background artifacts.
答案: 【GFP fusions enable one to track changes in the location of the protein in living cells; staining usually requires fixed cells】
5、 问题:Which one cleaves pre-miRNA in the cytoplasm to produce miRNA?
6、 问题:A single monoclonal antibody can bind to several different sites on an antigen
7、 问题:RNAi can be mediated just by introducing the already processed miRNA/siRNA into cells
8、 问题:_______ degrades mRNAs with sequences complementary to a bound siRNA
1、 问题:All the following statements describe biomembranes except:
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
答案: 【Endoplasmic reticulum】
3、 问题:Phospholipids with short or unsaturated fatty acyl chains
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.
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
B:mitochondrial inner membrane
答案: 【plasma membrane】
6、 问题:Phosphate containing lipids include all of the following except
7、 问题:A lipid bilayer is the fundamental structural component of all cell membranes.
8、 问题:Maintenance of the lipid bilayer in the plasma membrane requires special enzymes and the hydrolysis of ATP.
9、 问题:The most abundant lipids in cell membranes are ____.
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.
1、 问题:Classes of membrane transport proteins include all of the following except
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.
答案: 【5.5-fold faster】
3、 问题:How does uniport transport compare to simple diffusion?
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.】