2022 Medical cell biology（医学细胞生物学）(西南医科大学) 最新满分章节测试答案

文章目录[隐藏]

1. Introduction to Cells and Cell Biology 第一章单元测验
2. membrane structure and function 第二章单元测验
3.Endomembrane system 第三章单元测验
4.mitochondria 第四章单元测验
5. Cytoskeleton 第五章单元测验
6. Nucleus 第六章单元测验
7. cell proliferation 第七章单元测验
8. Cell Senescence and cell death 第八章单元测验
9.stem cell 第九章单元测验

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2022-03-28到2022-06-30

1. Introduction to Cells and Cell Biology 第一章单元测验

1、问题:Eukaryotic cells usually contain
选项：
A:a nucleus
B:mitochondria
C:ribosomes
D:microtubules
E:all of the above
答案: 【all of the above】

2、问题:1,000,000 nm is equal to
选项：
A:1 μm
B:10 μm
C:1 mm
D:10 mm
E:1 m
答案: 【1 mm】

3、问题:Unlike eukaryotes, prokaryotes lack
选项：
A:a plasma membrane
B:DNA
C: ribosomes
D:nuclei
E:molecular motors
答案: 【nuclei】

4、问题:Which of the following statements is NOT part of the cell theory?
选项：
A: All cells replicate their DNA at least once every 24 hours.
B:Cells can arise only by division from a pre-existing cell.
C:All cells contain a plasma membrane, a nucleus delimited by a nuclear membrane, mitochondria, lysosomes, Golgi, plus other organelles.
D:The cell is the structural unit of life.
E:Two of the above.
答案: 【Two of the above.】

5、问题:Which base is not found in the DNA of most organisms?
选项：
A: Adenine
B:Guanine
C:Cytosine
D:Uracil
E:Thymine
答案: 【Thymine】

6、问题:The bonds that join the nucleotides to form a single strand of DNA are
选项：
A:peptide bonds.
B: hydrogen bonds.
C:phosphodiester links.
D:van der Waals bonds.
E:disulfide bonds.
答案: 【phosphodiester links.】

7、问题:Which following material does not belong to the intracellular biological macromolecules ( )
选项：
A:nucleic acid
B: nucleotide
C:protein
D:Polysaccharides
E:None of above
答案: 【 nucleotide】

8、问题:Which of the following is not a function of the DNA molecule?
选项：
A:specification of amino acid sequence
B: assembly of amino acids into proteins
C:transcription of chemical coding onto RNA
D:self replication
E:storage of genetic information in most organisms.
答案: 【 assembly of amino acids into proteins】

9、问题:Peptide bonds result from
选项：
A:the reaction of amino groups with water.
B: the reaction of two carboxyl groups and removal of water.
C:the reaction of an amino group with a carboxyl group and loss of water.
D: reactions between amino acid side chains.
E: transfer of a phosphate group from ATP to the amino acid.
答案: 【the reaction of an amino group with a carboxyl group and loss of water.】

10、问题:The amino acids found in proteins are called
选项：
A:α amino acids.
B:ß amino acids.
C:γ amino acids.
D:δ amino acids.
E:π amino acids.
答案: 【α amino acids. 】

11、问题:The side chains of the amino acids serine, asparagine, and glutamine are all
选项：
A: normally negatively charged at pH 7.
B: normally positively charged at pH 7.
C: able to interact with water.
D:hydrophobic.
E:indifferent to their environment.
答案: 【 able to interact with water. 】

12、问题:The amino acids making up an α helix
选项：
A:have side chains that point outward—away from the center of the helix.
B: have side chains that point inward—making up a hydrophobic core for the helix.
C:have side chains that do not interact with amino acids elsewhere in the protein.
D:have side chains that are always hydrophobic.
E:include proline.
答案: 【have side chains that point outward—away from the center of the helix.】

13、问题: Disulfide bonds
选项：
A:form between two methionine residues.
B:form between two cystine residues.
C:form between two cysteine residues.
D:are found in cytoplasmic proteins.
E:attach microtubules to organelles.
答案: 【form between two cysteine residues. 】

14、问题:When a DNA strand with the sequence 3_ GACTAACGATGC 5_ is used as a template on which a daughter DNA sequence is formed, the daughter strand has the sequence
选项：
A: 3_ CTGATTGCTACG 5_
B:5_ GCATCGTTAGTC 3_
C:5_ CTGATTGCTACG 3_
D:3_ CGTAGCAATCAG 5_
E: 3_ CGUAGCAAUCAG 5_
答案: 【5_ CTGATTGCTACG 3_ 】

15、问题: Okazaki fragments are
选项：
A:short peptide sequences.
B:RNA primers.
C: newly synthesized stretches of DNA produced during replication of the lagging template strand.
D:degraded fragments of DNA.
E:the lengths of DNA between origins of replication.
答案: 【 newly synthesized stretches of DNA produced during replication of the lagging template strand.】

16、问题:The ribosome is involved in all of the following EXCEPT:
选项：
A:peptide bond formation
B: aminoacylation of tRNA
C:binding of protein factors during elongation
D:binding of aminoacyl tRNA to mRNA
E: binding of mRNA at an initiation codon
答案: 【 aminoacylation of tRNA】

17、问题:Which of the following do not play a role in replication?
选项：
A: RNA primers
B:Deoxynucleotides
C: Helicase
D:Stop codons
E:DNA polymerase
答案: 【Stop codons 】

18、问题: During DNA replication, the new DNA is formed on the lagging strand in a series of independent short sections because
选项：
A:DNA polymerase III can synthesize DNA in both the 3_ to 5_ and 5_ to 3_ directions but makes more mistakes when working in the 5_ to 3_ direction.
B:DNA polymerase III can only operate in the 5_ to 3_ direction.
C:Thymine dimers are excised from the growing strand, leaving it cut into short fragments.
D:The hydrogen bonding between adenine and thymine is relatively weak.
E:DnaA causes the DNA strands to melt.
答案: 【DNA polymerase III can only operate in the 5_ to 3_ direction.】

19、问题:The following options () carry genetic information derived from DNA and bind to the ribosome.
选项：
A: mRNA
B:tRNA
C:ttRNA
D:SnRNA
E: rRNA
答案: 【 mRNA】

20、问题: Prokaryotic cells only have the following organelles ( )
选项：
A: ribosome
B:endoplasmic reticulum
C:mitochondria
D:nuclear membrane
E:Nucleus
答案: 【 ribosome】

21、问题:A major difference between prokaryotic and eukaryotic cells is ( ).
选项：
A:Prokaryotic cells use RNA as their genetic material, while eukaryotic cells use DNA.
B:Eukaryotic cells respond to external stimuli, while prokaryotic cells do not.