bader22 - Free Online Quiz Maker

Q1 Score: 2.04

a- Hydrogenbond

b- Phosphodiester bonds.

c- Glycosidicbonds

d- all theabove

Q3 Score: 2.04

a- Cleavage of the phosphodiester bonds.

b- The formation of triple helix.

c- A decrease in light absorption at 260 nm.

d- Thedenaturatedtemperatureisdirectlyrelatedwiththeguanine & cytosine contents.

Q4 Score: 2.04

a- Thetwoendsarestructureequivalent

b- Themonomericunitsjoinedtogetherbyphosphodiester bonds

c- There are at least 20 different monomers that can be used.

d- Themonomericunitsarenotseparatedbyhydrolysis

Q5 Score: 2.04

a- DNA ispolydeoxynucleotide

DNAexistsasadoublehelixoftwocomplementaryanti- parallel strands

c- Thymidylate is a distinctive component of D

DNAhas3'-endsononeside,&two5'-endsontheotherside.

Q6 Score: 2.04

a- Hasfewerbasepairs/turnthanBDNA helix.

b- Is permanent conformation of DNA.

c- HasahighcontentofCGsequence

d- Right handed double helix.

Q7 Score: 2.04

a- Deoxynucleic acid.

b- Deoxyribonucleic acid.

c- Deoxyribodeoxynucleic acid

d- Dioxyribonucleic acid

Q8 Score: 2.04

a- DNAisformedoftwobranchedpolydeoxyribonucleotide chains

b- DNAissynthesizedbypolymerizationofdeoxynucleotides

c- DNAispresentinthenucleusandthemitochondria

d- BacterialDNAispresentinthesinglechromosome&the plasmids.

Q9 Score: 2.04

a- N-glycosidic linkage

b- Peptide bond

c- Phospho diester bond

d- Hydrogen bond.

Q10 Score: 2.04

a- histones Pts. (proteins)

b- non-histones Pts.

c- both a & b.

d- neither a nor b

Q11 Score: 2.04

a- ContainscovalentlylinkedRNA&DNA.

b- ContainsacoreoftwoeachofhistonesH2A,H2B,H3&H4.

c- Requireaspecificbasesequenceforformation

d- ContainacoreoftwoeachofhistonesH1,H2,&H5.

Q13 Score: 2.04

a- DNAisfoundassociatedwithproteins,formingnucleoprotein.

b- The5'-endofonestrandofDNAisbase-pairedwiththe3'-end of the other strand.

c- Phosphodiester bonds are heat resistant , but can be cleaved by nuclease enzymes.

d- DenaturationofDNAresultsfromdisruptionofphosphodiester bonds

Q14 Score: 2.04

a- DNAisdoublestrandedwhileRNAisabsolutelysingle stranded

b- DNAisresponsibleforstoringgeneticinformation&their transfer to daughter cells.

c- RNA is responsible for expressing the genetic information in the form of protein molecules.

d- DNAislocatedinthecellnuclei,whileRNAislocatedonlyin the cytoplasm

Q16 Score: 2.04

a- ThehelicalstructureofDNAhasamajor(wide)groove&a minor (narrow)groove.

b- Regulatoryproteinsbindtothemajor&minorgrooves, regulating DNA & RNA synthesis.

c- Separation of the two DNA strands from each other occurs at high temperature & is called reannealing.

d- Themeltingtemperature(Tm)isthetemperatureatwhichhalf of the helical structure of DNA is lost.

Q18 Score: 2.04

a- Deoxyuridylate

b- Deoxyguanylate

c- Deoxyadenylate

d- Deoxycytidylate

Q19 Score: 2.04

a- Appearanceofthemajor&minorgrooves.

b- Thickness of the helix

c- Polarity of the strands.

d- Numberofbasepairs/turn.

Q20 Score: 2.04

a- Ribose

b- 2'-deoxyribose

c- 5'-deoxyribose

d- Any of the above.

Q21 Score: 2.04

a- Atriple-strandstructure

b- TheDNAstrandsrunninginoppositedirections

c- BasepairingbetweenbasesA&G.

d- Covalent bonding between bases.

Q22 Score: 2.04

a- 5'GTTCCCAA-3'.

b- 5'TTGGGAAC-3'.

c- 3'TTGGGAAC-5'.

d- 3'-GTTCCCAA-5'.

Q23 Score: 2.04

a- Theindividualstrandsarenothelical

b- Hydrogenbondsformbetweenpurine&pyrimidinebaseon the samestrand.

c- Adenine on one strand is hydrogen bonded to thymine on the opposite strand

d- Phosphodiesterbondsareorientedtowardtheinteriorofthe helix

Q24 Score: 2.04

a- Adenine + guanine.

b- Cytosine+thymine.

c- Adenine +thymine.

d- Cytosine+guanine

Q25 Score: 2.04

a- Adenine equals thymine

b- Adenine equalsuracil

c- Guanine equals adenine.

d- Cytosineequalsthymine

Q26 Score: 2.04

a- Pyrimidine + pentose + phosphate.

b- Purine + pentose + phosphate.

c- Purine or pyrimidine + pentose.

d- Purine or pyrimidine + phosphate

Q27 Score: 2.04

1- The two nucleotide strands are held together by hydrogen

The number of thymidylate subunits should equal the number of deoxycytidylatesubunits

The number of deoxyadenylate subunits is essentially equal to the number of deoxyguanylate subunits

All the above is true.

Q28 Score: 2.04

a- Phosphoric acid.

b- Pentoses

c- Adenosine

d- Cytosine

Q29 Score: 2.04

a- IsregulatoryrepeatingstructureofDNA&histonesproteins.

b- HasacoreofDNAwithproteinswrappedaroundtheoutside

c- Usesonlyonetypeofhistonespernucleosome

d- Is separated from a second nucleosome by non-histone protein.

Q30 Score: 2.04

a- A=3100 , T=2600 , C=2600 , G=3100.

b- A=3000 , T=2200 , C=3400 , G=3200.

c- A=2600 , T=2600 , C=3300 , G=3300.

d- A=3300 , T=3300 , C=2600 , G=2600.

Q32 Score: 2.04

a- A nucleoside phosphate

b- Ribose diphosphate

c- A nucleoside minus phosphate

d- A hydrolytic product of nucleosides

Q33 Score: 2.04

a- dehydrated,carbon3.

b- Oxygenated,carbon2.

c- Oxygenated,carbon3.

d- Deoxygenate,carbon2

Q35 Score: 2.04

a- Poly-nucleoside

b- Poly-nucleotide

c- Either (a) or (b).

d- Neither (a) nor. (b)

Q36 Score: 2.04

a- A nitrogen base & ribose.

b- A nitrogen base , a pentose & phosphate.

c- A nitrogen base & phosphate

d- Any of the above

Q39 Score: 2.04

a- A&TrichDNAdenaturesatalowertemperaturethanG&C rich DNA

b- Denaturationcausesanincreaseinabsorbanceat260nmofa DNA solution

c- Both (a) & (b).

d- Neither(a)nor(b).

Q40 Score: 2.04

a- 2'-hydroxylofonenucleotideto3'-hydroxylofthe ABCDE 1 2 3 4 5 6 Yourscore:.../6 6- following

b- 3'-hydroxylofonenucleotideto3'-hydroxylofthefollowing.

3'-hydroxyl of one nucleotide to 5'-hydroxyl of the following.

d- 5'-hydroxylofonenucleotideto5'-hydroxylofthe following.

Q41 Score: 2.04

a- A nucleoside

b- A nucleotide

c- A purine ring.

d- A pyrimidine ring

Q43 Score: 2.04

a- Adenine & cytosine.

b- Guanine & thymine.

c- Adenine & guanine.

d- Thymine & uracil.

Q44 Score: 2.04

a- Buildingunitsofnucleicacids

b- Sources of highenergy

c- Second messengers

d- Structuralcomponentsofmembranes

Q46 Score: 2.04

a- Deoxyguanylate&deoxycytidylateareattachedtoeachother by two hydrogen bonds.

Threehydrogenbondsexistbetweendeoxyadenylate

c- The A-T attraction is about 50% stronger than the C-G attraction

d- Noneoftheaboveistrue

Q47 Score: 2.04

a- Hydrophobic interactions

b- Phosphodiester bond.

c- Vanderwaalsforce

d- Hydrogen bond.