'; answerText[15] = '
'; numberText[16] = '17.'; questionText[16] = '
a.
|
deoxyribose
|
c.
|
phosphate
|
b.
|
nitrogenous base
|
d.
|
ribose
|
'; answerText[16] = '
'; numberText[17] = '18.'; questionText[17] = '
a.
|
cytosine and guanine
|
c.
|
ribose and adenine
|
b.
|
phosphate and deoxyribose
|
d.
|
uracil and thymine
|
'; answerText[17] = '
'; numberText[18] = '19.'; questionText[18] = '
a.
|
a sequence of amino acids.
|
b.
|
special proteins found in chromosomes.
|
c.
|
a sequence of nucleotides that controls the production of a certain ' + 'protein.
|
d.
|
a sequence of ' + 'nucleotides coding for the production of starches and sugars.
|
'; answerText[18] = '
'; numberText[19] = '20.'; questionText[19] = '
a.
|
'unzip'.
|
c.
|
attract nitrogenous bases.
|
b.
|
act as a template.
|
d.
|
destroy a genetic code.
|
'; answerText[19] = '
'; numberText[20] = '21.'; questionText[20] = '
a.
|
nucleic acids
|
c.
|
nucleotides
|
b.
|
hereditary traits
|
d.
|
proteins
|
'; answerText[20] = '
'; numberText[21] = '22.'; questionText[21] = '
a.
|
fats
|
c.
|
lipids
|
b.
|
nucleotides
|
d.
|
amino acids
|
'; answerText[21] = '
'; numberText[22] = '23.'; questionText[22] = '
a.
|
converts to RNA
|
c.
|
joins mRNA
|
b.
|
joins tRNA
|
d.
|
strands separate
|
'; answerText[22] = '
'; numberText[23] = '24.'; questionText[23] = '
a.
|
They control biochemical pathways within the ' + 'cell.
|
b.
|
They direct the ' + 'synthesis of lipids.
|
c.
|
They are composed of sugars.
|
d.
|
They take responsibility for cell movement.
|
'; answerText[23] = '
'; numberText[24] = '25.'; questionText[24] = '
a.
|
amino acids.
|
c.
|
monosaccharides.
|
b.
|
fatty acids.
|
d.
|
nucleotides.
|
'; answerText[24] = '
'; numberText[25] = '26.'; questionText[25] = '
a.
|
contains phosphate groups
|
c.
|
has four nitrogen bases
|
b.
|
undergoes transcription
|
d.
|
has a double helix shape
|
'; answerText[25] = '
'; numberText[26] = '27.'; questionText[26] = '
a.
|
nitrogen bonds
|
c.
|
bases
|
b.
|
relatively weak chemical bonds
|
d.
|
nucleotides
|
'; answerText[26] = '
'; numberText[27] = '28.'; questionText[27] = '
a.
|
ribose sugar
|
c.
|
pyrimidine
|
b.
|
purine
|
d.
|
phosphate group
|
'; answerText[27] = '
'; numberText[28] = '29.'; questionText[28] = '
a.
|
are complementary.
|
c.
|
must replicate again.
|
b.
|
are identical.
|
d.
|
cannot replicate again.
|
'; answerText[28] = '
'; numberText[29] = '30.'; questionText[29] = '
a.
|
some amino acids lack codons
|
b.
|
some amino acids have more than one codon
|
c.
|
all amino acids have two codons
|
d.
|
none of the above
|
'; answerText[29] = '
'; numberText[30] = '31.'; questionText[30] = '
a.
|
DNA
|
c.
|
tRNA
|
b.
|
mRNA
|
d.
|
B and C
|
'; answerText[30] = '
'; numberText[31] = '32.'; questionText[31] = '
a.
|
synthesizing DNA.
|
c.
|
forming ribosomes.
|
b.
|
synthesizing mRNA.
|
d.
|
transferring amino acids to ribosomes.
|
'; answerText[31] = '
'; numberText[32] = '33.'; questionText[32] = '
a.
|
variable number
|
c.
|
threes
|
b.
|
twos
|
d.
|
fours
|
'; answerText[32] = '
'; numberText[33] = '34.'; questionText[33] = '
a.
|
double-stranded
|
c.
|
like a ladder
|
b.
|
single-stranded
|
d.
|
both A and C
|
'; answerText[33] = '
'; numberText[34] = '35.'; questionText[34] = '
a.
|
200
|
c.
|
600
|
b.
|
400
|
d.
|
800
|
'; answerText[34] = '
'; numberText[35] = '36.'; questionText[35] = '
a.
|
replication
|
c.
|
translation
|
b.
|
transcription
|
d.
|
both A and ' + 'B
|
'; answerText[35] = '
'; numberText[36] = '37.'; questionText[36] = '
a.
|
ATC
|
c.
|
ATG
|
b.
|
UTC
|
d.
|
AUC
|
'; answerText[36] = '
'; numberText[37] = '38.'; questionText[37] = '
a.
|
contains deoxyribose.
|
c.
|
contains thymine.
|
b.
|
is double stranded.
|
d.
|
contains uracil.
|
'; answerText[37] = '
'; numberText[38] = '39.'; questionText[38] = '
a.
|
DNA
|
c.
|
tRNA
|
b.
|
mRNA
|
d.
|
both B and C
|
'; answerText[38] = '
'; numberText[39] = '40.'; questionText[39] = '
a.
|
anticodon.
|
c.
|
enzyme.
|
b.
|
codon.
|
d.
|
nuclei acid.
|
'; answerText[39] = '
'; numberText[40] = '41.'; questionText[40] = '
a.
|
guanine
|
c.
|
thymine
|
b.
|
adenine
|
d.
|
cytosine
|
'; answerText[40] = '
'; numberText[41] = '42.'; questionText[41] = '
a.
|
becomes attached to messenger RNA.
|
b.
|
becomes attached to ribosomal RNA.
|
c.
|
is destroyed as an individual molecule.
|
d.
|
moves away to pick up another amino acid.
|
'; answerText[41] = '
'; numberText[42] = '43.'; questionText[42] = '
a.
|
cytosine, uracil, adenine, guanine, ' + 'uracil
|
c.
|
uracil, adenine, cytosine, uracil, ' + 'guanine
|
b.
|
guanine, cytosine, ' + 'uracil, adenine, uracil
|
d.
|
cytosine, guanine, uracil, uracil, ' + 'adenine
|
'; answerText[42] = '
'; numberText[43] = '44.'; questionText[43] = '
a.
|
glucose
|
c.
|
ribose
|
b.
|
sucrose
|
d.
|
deoxyribose
|
'; answerText[43] = '
'; numberText[44] = '45.'; questionText[44] = '
a.
|
is single-stranded.
|
c.
|
contains the nitrogen base uracil.
|
b.
|
contains a different sugar molecule.
|
d.
|
All of the above are correct.
|
'; answerText[44] = '
'; studentName = StripSpaces(f.student_name.value); FixMTF(f); index = 0; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf(":") > 0) { text = StripSpaces(GetResponse(index, f.elements[i])); if (text.length == 0) ++numBlank; ++index; } } if (studentName == "") { alert("Student name cannot be blank."); return(false); } if (numBlank > 0) { if (numBlank == 1) msg = "1 question"; else msg = numBlank + " questions"; if (!confirm("You have not answered " + msg + " Are you sure you want to end the test?")) return(false); } index = 0; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf(":") > 0) { text = GetResponse(index, f.elements[i]); if (ansMap[index] == "") { prefixText[index] = "
"; ++numSubjective; } else { isCorrect = ScoreAnswer(index, text); if (isCorrect) ++numCorrect; ++numPossible; prefixText[index] = BuildPrefixText(index, text, isCorrect); } responseText[index] = TranslateHtmlString(text); ++index; } } if (showNotes) { for (i=0; i < numQuestions; ++i) { if (qtypeMap.charAt(i) == "2") notesText[i] = FixMCNotes(notesText[i], responseText[i]); } } if (numPossible > 0) scorePercent = Math.round(100.0 * numCorrect / numPossible); else scorePercent = 0; studentName = TranslateHtmlString(studentName); document.writeln("n"); document.writeln("
n"); document.writeln("
"); document.writeln("Name: " + studentName + ""); document.write("Score: " + numCorrect + " / " + numPossible + " (" + scorePercent + "%)"); if (numSubjective > 0) { document.write(" [" + numSubjective + " subjective "); if (numSubjective == 1) document.write("question"); else document.write("questions"); document.write(" not graded]"); } document.writeln(" "); document.writeln("
"); document.writeln("
"); document.writeln(instructionText[currentInstruction]); document.writeln("
"); document.writeln(" |
||||||||
"); document.writeln(narrativeText[currentNarrative]); document.writeln("
"); document.writeln(" |
||||||||
" + prefixText[i] + " |
" + numberText[i] + "
|
" + questionText[i]); document.writeln("
"); document.writeln("
"); document.writeln("
|
"); document.writeln("
"); document.writeln("
|
|
"); document.writeln(" | "); document.write(""); document.writeln(""); document.writeln(" |
"); document.writeln(""); document.writeln(""); document.close(); return(false); } function GetResponse(answerIndex, answer) { var listIndex; var responseText; if (listMap.charAt(answerIndex) == "1") { listIndex = answer.selectedIndex; responseText = answer.options[listIndex].text; } else responseText = answer.value; return(responseText); } function ScoreAnswer(answerIndex, responseText) { var listIndex; var answerText; answerText = ansMap[answerIndex]; if (qtypeMap.charAt(answerIndex) == "4") return(NumericCompare(responseText, answerText)); else if (qtypeMap.charAt(answerIndex) == "5") return(MultiCompare(responseText, answerText)); else if (responseText.toUpperCase() == answerText.toUpperCase()) return(true); else return(false); } function BuildPrefixText(answerIndex, responseText, isCorrect) { var text; var listIndex; text = "
" if (isCorrect) text += "" else text += " " if (listMap.charAt(answerIndex) == "1") { if (responseText.length == 0) responseText = " "; text += " " + responseText + " "; } text += "
" return(text); } function StripSpaces(s) { var len; var i; len = s.length; for (i=len - 1; i >= 0 && s.charAt(i) == " "; --i) len = i; if (len == 0) s = ""; else if (len != s.length) s = s.substring(0, len); return(s); } function TranslateHtmlString(text) { var newText; var replaceString; var position; var length; var breakPos; var skipExtra; var i; newText = ""; position = 0; length = text.length; while (position < length) { skipExtra = 0; breakPos = -1; for (i=position; i < length && breakPos < 0; ++i) { switch(text.charAt(i)) { case '>': replaceString = ">"; breakPos = i; break; case '<': replaceString = "<"; breakPos = i; break; case '&': replaceString = "&"; breakPos = i; break; case 'r': if ((i + 1) < length && text.charAt(i + 1) == 'n') skipExtra = 1; replaceString = "
"; breakPos = i; break; case 'n': replaceString = "
"; breakPos = i; break; case ' ': if ((i + 1 < length) && text.charAt(i + 1) == ' ') { replaceString = " "; breakPos = i; } break; } } if (breakPos < 0) { newText += text.substring(position, length); position = length; } else { if (breakPos > position) newText += text.substring(position, breakPos); newText += replaceString; position = breakPos + 1 + skipExtra; } } return(newText); } function FixMCNotes(notesText, studentText) { var displayText; var searchText; var upperNotes; var charCode; var startIndex; var endIndex; displayText = ""; if (studentText.length > 0 && notesText.length > 0) { upperNotes = notesText.toUpperCase(); studentText = studentText.toUpperCase(); charCode = studentText.charCodeAt(0); searchText = "/" + String.fromCharCode(charCode) + "/"; startIndex = upperNotes.indexOf(searchText); if (startIndex >= 0) { startIndex += searchText.length; searchText = "/" + String.fromCharCode(charCode + 1) + "/"; endIndex = upperNotes.indexOf(searchText, startIndex); if (endIndex < startIndex) endIndex = notesText.length; displayText = notesText.substring(startIndex, endIndex); } else if (notesText.charAt(0) != "/") displayText = notesText; } return(displayText); } function NumericCompare(s1, s2) { var s1Sign; var s2Sign; var tempString; var decimalCount; var decimalPos; var numToDelete; var len; var ch; var i; s1.toUpperCase(); s2.toUpperCase(); if (s1 == s2) return(true); else { s1Sign = 1; s2Sign = 1; tempString = ""; for (i=0; i < s1.length; ++i) { ch = s1.charAt(i); if (ch == "-" && tempString.length == 0) s1Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s1 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s1.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s1.charAt(i) == '0') len = i; else break; } if (len < s1.length) s1 = s1.substring(0, len); if (s1.length == 0) s1 = "0"; } numToDelete = 0; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s1.length) --numToDelete; if (numToDelete > 0) s1 = s1.substring(numToDelete); } ///////////////////////////////////////////// tempString = ""; for (i=0; i < s2.length; ++i) { ch = s2.charAt(i); if (ch == "-" && tempString.length == 0) s2Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s2 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s2.length; ++i) { if (s2.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s2.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s2.charAt(i) == '0') len = i; else break; } if (len < s2.length) s2 = s2.substring(0, len); if (s2.length == 0) s2 = "0"; } numToDelete = 0; for (i=0; i < s2.length; ++i) { if (s2.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s2.length) --numToDelete; if (numToDelete > 0) s2 = s2.substring(numToDelete); } if (s1Sign == s2Sign && s1 == s2) return(true); } return(false); } function MultiCompare(responseText, answerText) { var startIndex; var endIndex; var partialText; responseText = responseText.toUpperCase(); answerText = answerText.toUpperCase(); startIndex = 0; do { endIndex = answerText.indexOf("r", startIndex); if (endIndex < 0) partialText = answerText.substring(startIndex); else partialText = answerText.substring(startIndex, endIndex); if (responseText == partialText) return(true); startIndex = endIndex + 1; } while (endIndex > 0); return(false); } function FixMTF(f) { var text; var letter; var theList; var listIndex; var number; var i; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf("MTF:") == 0) { number = parseInt(f.elements[i].name.substring(4), 10); theList = f["MTF-" + number + "-1"]; if (theList) { listIndex = theList.selectedIndex; letter = theList.options[listIndex].text; } else letter = ""; text = StripSpaces(f["MTF-" + number + "-2"].value); if (text == "") f.elements[i].value = letter; else f.elements[i].value = letter + "," + text; } } } function AllowReset() { return(window.confirm("Do you want to clear all of your answers?")); } // -->
Name:
|
True/False
Indicate whether the sentence or statement is true or false.
|
||||||||||||||||||||||
1. |
When a tRNA anticodon binds to an mRNA codon, the amino acid detaches from the tRNA molecule and attaches to the end of a growing protein chain.
|
|||||||||||||||||||||
2. |
Only ribosomal RNA plays a role in translation.
|
|||||||||||||||||||||
3. |
During DNA replication, the molecule unzips and the exposed DNA nucleotides pair with other
specific nucleotides present in the nucleus
|
|||||||||||||||||||||
4. |
Humans pass exact copies of their DNA to their offspring.
|
|||||||||||||||||||||
5. |
Watson and Crick proposed a model of DNA
|
|||||||||||||||||||||
6. |
Amino acids are linked together by hydrogen bonds.
|
|||||||||||||||||||||
7. |
During transcription, the information on a DNA molecule is “rewritten” into an mRNA molecule.
|
|||||||||||||||||||||
8. |
All codons encode amino acids.
|
|||||||||||||||||||||
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
|
||||||||||||||||||||||
9. |
Purines and pyrimidines are
|
|||||||||||||||||||||
10. |
Chargaff’s rules, or the base-pairing rules, state that in DNA
|
|||||||||||||||||||||
11. |
ATTG : TAAC ::
|
|||||||||||||||||||||
12. |
Which of the following types of RNA carries instructions for making proteins?
|
|||||||||||||||||||||
13. |
Which of the following is not found in DNA?
|
|||||||||||||||||||||
14. |
Suppose that you are given a polypeptide sequence containing the following sequence of amino acids: tyrosine, proline, aspartic acid, isoleucine, and cysteine. Use the portion of the genetic code given in the table below to determine the DNA sequence that codes for this polypeptide sequence.
|
|||||||||||||||||||||
15. |
In order for protein synthesis to occur, mRNA must migrate to the
|
|||||||||||||||||||||
16. |
After the primary structure of a protein has been completed
|
|||||||||||||||||||||
17. |
Which of the following is not part of a molecule of DNA?
|
|||||||||||||||||||||
18. |
During replication in a molecule of DNA, one separation likely to occur is between
|
|||||||||||||||||||||
19. |
A gene may be described as
|
|||||||||||||||||||||
20. |
The synthesis of a new double strand of DNA begins when the two strand of the original DNA helix
|
|||||||||||||||||||||
21. |
Genes(DNA) affect cell structure and function by directing the synthesis of
|
|||||||||||||||||||||
22. |
Protein molecules are made up of
|
|||||||||||||||||||||
23. |
During, DNA replication, DNA
|
|||||||||||||||||||||
24. |
Which is not true about proteins?
|
|||||||||||||||||||||
25. |
Molecules of DNA are composed of long chains of
|
|||||||||||||||||||||
26. |
Watson and Crick were the first scientists to state that DNA
|
|||||||||||||||||||||
27. |
The two chains of a DNA molecule are connected by
|
|||||||||||||||||||||
28. |
All nucleotide molecules contain the same kind of
|
|||||||||||||||||||||
29. |
After DNA replication, the two DNA molecules that are made
|
|||||||||||||||||||||
30. |
Sixty-four codons for 20 amino acids requires that
|
|||||||||||||||||||||
31. |
Which of the following combines with amino acids
|
|||||||||||||||||||||
32. |
rRNA has a function in
|
|||||||||||||||||||||
33. |
The DNA code consists of sequences of nucleotides arranged in groups of
|
|||||||||||||||||||||
34. |
Unlike mRNA, the DNA molecule is
|
|||||||||||||||||||||
35. |
The number of bases in a row in a gene that codes a protein composed of 200 amino acids is
|
|||||||||||||||||||||
36. |
A DNA molecule unzips during
|
|||||||||||||||||||||
37. |
A DNA chain has the following sequence of bases, TAG. The corresponding messenger RNA
chain should have the sequence
|
|||||||||||||||||||||
38. |
Unlike DNA, RNA
|
|||||||||||||||||||||
39. |
Which molecule contains deoxyribose
|
|||||||||||||||||||||
40. |
Each combination of three nitrogenous bases on messenger RNA forms a (an)
|
|||||||||||||||||||||
41. |
In RNA, uracil is complementary to:
|
|||||||||||||||||||||
42. |
Once a molecule of transfer RNA has released its amino acid, the tRNA
|
|||||||||||||||||||||
43. |
If the sequence of bases in a segment of a DNA strand were cytosine, guanine, adenine, thymine, adenine, then the sequence in a complimentary strand of newly-made mRNA would be
|
|||||||||||||||||||||
44. |
Which sugar is present in RNA
|
|||||||||||||||||||||
45. |
RNA differs from DNA, in that RNA
|