2021 分子生物学(东北林业大学) 最新满分章节测试答案

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本课程起止时间为:2021-03-15到2021-07-26
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第二章 基因概念的演化与发展 第二章单元测试

1、 问题:A DNA nucleotide may consist of 
选项：
A:a
ribose sugar, a phosphate group, and adenine.
B: a phosphate group, deoxyribose, and cytosine.
C:uracil,
deoxyribose, and a phosphate group.
D:deoxyribose,
thymine, and a hydroxyl group.
答案: 【 a phosphate group, deoxyribose, and cytosine.】

2、 问题:Which is the most accurate representation of the organization levels of the genetic information in cells?
选项：
A:genes ž nucleotidežchromosomes žgenome. 
B:genomež genesžnucleotidesžchromosomes. 
C:chromosomesžgenes ž nucleotides žgenome. 
D:nucleotidesžgenesžchromosomesžgenome. 
答案: 【nucleotidesžgenesžchromosomesžgenome. 】

3、 问题:Eukaryotic cells differ from prokaryotic cells in that only the former contain
选项：
A: ribosomes.
B:cytoplasm.
C:DNA.
D:a nucleus. 
答案: 【a nucleus. 】

4、 问题:The prokaryotic organism that has been the subject of many genetic studies is
选项：
A:Saccharomyces cerevisiae.
B:Neurospora crassa.
C:E. coli.
D:Drosophila melanogaster. 
答案: 【E. coli.】

5、 问题:Which element is not found in a molecule of DNA?
选项：
A:carbon.
B:sulfur.
C:nitrogen.
D:oxygen. 
答案: 【sulfur.】

6、 问题:Which is found in RNA, but not DNA?
选项：
A:Phosphate.
B:Adenine.
C: Ribose.
D:Cytosine.
答案: 【 Ribose.】

7、 问题:The two polynucleotide chains in a molecule of DNA
are held together by what type of bond?
选项：
A:Phosphodiester.
B:Phosphate.
C: Peptide.
D:hydrogen.
答案: 【hydrogen.】

8、 问题:The DNA that makes up bacterial chromosomes is
选项：
A:single-stranded.
B:circular
and supercoiled.
C:complexed
with histones.
D:  all
the above.
答案: 【circular
and supercoiled.】

9、 问题:Which of the following is a DNA base pair?
选项：
A:A-T.
B:T-C.
C:A-U.
D:G-T.
答案: 【A-T.】

10、 问题: Which of the following is a RNA base pair? 
选项：
A:A-T.
B: A-C
C:U-C
D:U-A
答案: 【U-A】

11、 问题:The DNA and histone proteins in a eukaryotic chromosome are compacted into structures called
选项：
A: proteosomes.
B:nucleosomes.
C:telomeres.
D:centromeres.
答案: 【nucleosomes.】

12、 问题:In his transformation experiments, Frederick
Griffith observed that virulent strains of Streptococcus pneumoniaeproduced ___ colonies.
选项：
A:smooth,
shiny
B:rough,
dry
C:exceptionally
large
D:unusually
colored
答案: 【smooth,
shiny】

13、 问题: Viral genomes may be composed of
选项：
A:RNA
only.
B: DNA
only.
C:either
RNA or DNA.
D:both
RNA and DNA.
答案: 【either
RNA or DNA.】

14、 问题:In the Hershey-Chase blender experiments, their
major conclusion was that
选项：
A:a
single gene directed the synthesis of a single polypeptide.
B:DNA
was the genetic material.
C:DNA
was a double helix.
D:the
genetic material was located in the nucleus of cells.
答案: 【DNA
was the genetic material.】

15、 问题:The type of DNA found most commonly in living cells
is the ___ form.
选项：
A:A.
B:B.
C:C.
D:Z.
答案: 【B.】

16、 问题:Genes located in which region of a eukaryotic
chromosome are most likely to be transcribed?
选项：
A:centromere 
B:telomere
C:euchromatin 
D:heterochromatin 
答案: 【euchromatin 】

17、 问题:A nucleoside consists of a
选项：
A:pentose
sugar and a nitrogenous base.
B:phosphate
group and a nitrogenous base.
C:pentose
sugar and a phosphate group.
D:pentose
sugar, a phosphate group, and a nitrogenous base
答案: 【pentose
sugar and a nitrogenous base.】

18、 问题:Prokaryotic chromosomes consist mostly of 
选项：
A: unique
sequence DNA only.
B:repetitive
sequence DNA only.
C:either
unique sequence or repetitive sequence DNA.
D:both
unique sequence and repetitive sequence
答案: 【 unique
sequence DNA only.】

19、 问题:To create a karyotype, ___ chromosomes are spread on