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习题练习:Continuity and Change D.2 Protein Synthesis



 作者: admin   总分: 30分  得分: _____________

答题人: 匿名未登录  开始时间: 24年01月10日 21:44  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which row in the table correcttlrhc0wfrk :52n5 f3tly describes the shape and function of a named prot2n3k:ffhlr5 0rw ctt5 ein?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which nucleic acid carries genetic material coding f80wmp j4q 2qhx2sd go* bbc,i45ada+g or proteins?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of these does .dh7 jwf+d 7v- njo1fonot cause mutations?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The diagram below shows the genetic codduv (i ,0p7opve table.


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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following statements i9y )3zgs n1,npkiad0a s false regarding translation?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following contain/yw5s/ upj sa nr,)/: sep,odd peptide bonds?
I. Amino Acids
II. Dipeptides
III. Proteins

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The table gives the genetic z i5:*kg ;5okc8gunqv code.

Which polypeptide is produced by the mRNA sequence AUG GCU AAA UAG CGA?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the followi8eh;fcvow+rdog ;tgq 1* 6q6w ng contain peptide bonds?
I. Polypeptides
II. Amino acids
III. Proteins

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The diagram below shows the genetic codjy vprnirdh 3 qnz6/3h7*v28i e.


Which of the following features can be deduced from the genetic code?
I. Codons consisting of different bases can code for the same amino acid
II. Codon AUG does not code for an amino acid
III. mRNA strands coding for a protein will always contain codons that do not code for amino acids

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Ribosomes have three bindia kj 8hwdj34mu2ye+sfq; 1 ny5ng sites. Which statements are correct for the functions of td3a e2qh+yf;5k jw 4j1n uy8mshese sites?


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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What does the phrase ‘the genetic code is unives qw .b52 gzx;.r86m dvafh0osrsal’ mean?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following reactions results ps h)k09(t a wxi lbb-/usdd-(in the formation of a dipeptide from two amino acids?(d- kt s/w -l9b0xaisd (hubp)

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13#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The diagram below represents the process of transla ilckbk0wf6u/p*5 )yxtion.

1.1.Identify structures Q and R on the diagram.

1.2.Outline the roles of the binding sites within structure R.

1.3.State the name of the entire structure which has formed in the diagram.

2.Describe how the named structure a(iii) works.

3.Describe the secondary structure of a protein.
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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The diagram shows how RNA is transcribed from DNA. What structures af)t ) /*ilvxpr:o k4)th shfs/re indicated by the labi xhh)r l fs)*pt:vtks4)fo/ /els X, Y, and Z?


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15#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The diagram below shows the66rkp-;1f +vto wg efa(3wwp. jmppu- genetic code.


1.Identify the amino acid sequence of a peptide produced from the following mRNA codon sequence using the genetic code.
5’– AUG GGG AAG GGU CGA AGC UAA – 3’

2.Codons need to consist of a sequence of three bases to code for one amino acid. State one reason why codons need to consist of three bases.

3.Calculate the number of nucleotides present in the mRNA strand if the polypeptide synthesised has a length of 120 amino acids.
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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which statements about translation are nos2tgsm8 8o48,r k0pmah- nuvft true?
I. Mature mRNA binds to the large subunit of the ribosome before the small subunit.
II. The A site is the first site that the initiation tRNA binds to.
III. The polypeptide chain is released when release factors bind to the E site.

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following shows the correct sequence of mRNA synipc+ s y;vbd2+)z) yuethesis?
I. RNA polymerase matches free nucleotides to the DNA strand.
II. Transcription continues until it reaches a terminator sequence.
III. RNA polymerase binds to the promoter region.

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The diagram below shows a prol i9ttao,j iv+: z5xrm.k9b:c tein composed of three polypeptide chains, each chain conta c.+k moit9t rabz: ,59xlvji:ins 20 amino acids.

How many water molecules would be released in the synthesis of one of these chains?

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A non-coding (antisense) strand of DNA consists of the following nusn1ej8u*u b2cay e,pgn4q0i3cleotides:
GGCACATTAG
Which of the following represents the RNA transcript produced by this DNA strand?

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The diagram shows a mruqn: cg 0qa9a(f:5k z(,, vcd3c gcboolecule that plays an important role in protein synthesis. c0q ko :93ua qbag(z,g5vdc(:ncrc ,f

Which is found at X?
I. Uncoiled DNA
II. Amino acid binding site
III. RNA nucleotides

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A single base substitution mutation occurs and a stop zug s7e 0b:,:ttn1mc qcodon is not produced. Which of the following is not a possible consequence of this type of mutation? ,b0ztu eg:n7:1tc sqm

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the DNA in a somatic cell is changed in an animal as a result of a mutation,km- .yoj/t hsmw1s 1*d which of the followi1./d sykj*wso-t mh1m ng could most significantly affect other tissues in the animal?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which statement about ktumf(6dan,s8hu/ 3m..w khjtranslation only applies to prokaryotes?

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The diagram shows a tRNA molecule. Which of the folpt gg5:h(;cx4cb9 7xwms.s xe:a)yjblowing would bind to the position label4 smep:a 5y;j)gwb g 9x. ct:hsxc7(xbled R?


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25#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The diagram below shows the replica u / j-vysno27,h8kkkntion of DNA.


1.Describe the characteristics of the enzyme Taq polymerase.

2.Suggest what the consequences for a cell would be if transcription were to stop.

3.Outline the roles of all enzymes involved in the replication of DNA and in the synthesis of mRNA through transcription.
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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
1.Distinguish between eukaryotic and prokaryotic tralfpcx5 0) w q:ks,qw n/wn5qb(nscription.

2.Describe the roles of non-coding DNA sequences.

3.Describe the role of DNA-binding proteins in gene expression.
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27#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Different species of living organisms have different numbers of genes chajxbq+ to 5z)4kracteristic to them. Tzx45 t )+okqbjhe table shows the estimated number of genes for five species.
Species Estimated number of genes
Escherichia coli (bacteria species) 4,000
Drosophila melanogaster (fruit fly) 13,000
Canis lupis familiaris (dog) 20,000
Homo sapiens (humans) 30,000
Oryza sativa (rice) 40,000

1.Using the information in the table deduce the estimated number of loci in a human genome.

2.Explain how a mutation can affect a characteristic.
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28#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
1.Describe the characteristics of sq4w)b9 u7tfrzmf/ z9the genetic code.

2.Outline, with examples, the importance of complementary base pairing.

3.Explain the roles of RNA and ribosomes in the formation of a polypeptide chain once mRNA has exited the nucleus.
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29#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The image below shows a short frag+rv ur4ol*. wrment of the DNA molecule.


1.Suggest one possible outcome if DNA consisted of two parallel strands instead of two antiparallel strands.

2.The structure of DNA is described as being a 'double helix'. Explain how this structure is related to the DNA function.

3.Compare and contrast the nitrogenous bases thymine and uracil.
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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Why can a eukaryote produce a larger number of mRNA transcripts s6 l** bfpytzbc- z4nai+oh-9 than the number of genes in its 9 f6p-b zs *iyaob 4nh*-c+zltgenome?

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