DNA Structure & Replication Quiz

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Test your knowledge on DNA basics.

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Naomi Morales

United States

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DNA Structure & Replication Quiz


Froggy Jumps DNA Structure & Replication QuizVersion en ligne Test your knowledge on DNA basics. par Naomi Morales 1 What macromolecule carries genetic information in cells? a DNA b RNA c Protein 2 Which base pairs with Adenine in DNA? a Guanine b Uracil c Thymine 3 Which base pairs with Cytosine in DNA? a Guanine b Thymine c Adenine 4 What is the sugar backbone of DNA called? a Deoxyribose b Ribose c Glucose 5 What holds the genetic code in units? a Sugars b Amino acids c Nucleotides 6 Which structure carries genetic information in the cell? a Plasma membrane b Ribosome c Chromosome 7 What initiates DNA replication at specific sites called? a Promoter b Operator c Origin of replication 8 Which enzyme unwinds the DNA double helix? a Helicase b Ligase c Polymerase 9 Which enzyme adds RNA primers during replication? a Topoisomerase b Primase c Ligase 10 What enzyme synthesizes new DNA strands? a Ligase b RNA polymerase c DNA polymerase 11 In DNA, which strand runs 5' to 3' direction? a Okazaki fragment b Lagging strand c Leading strand 12 Which fragments are synthesized on the lagging strand? a Leading segments b Okazaki fragments c Primer fragments 13 What joins Okazaki fragments? a RNA ligase b DNA polymerase c DNA ligase 14 What is the shape of a DNA molecule? a Double helix b Alpha helix c Beta sheet 15 Which base pairs with Adenine in RNA (instead of Thymine)? a Thymine b Cytosine c Uracil 16 Which bond holds base pairs together? a Covalent bonds b Ionic bonds c Hydrogen bonds 17 What is the term for the complete set of an organism's genetic material? a Proteome b Genome c Transcriptome 18 Which process copies DNA before cell division? a Translation b Transcription c DNA replication 19 Which enzyme relieves supercoiling during replication? a Helicase b Topoisomerase c Primase 20 Which strand is synthesized discontinuously? a Template strand b Leading strand c Lagging strand 21 Which enzyme removes RNA primers in DNA replication? a DNA polymerase b Ligase c RNase H 22 What direction do DNA strands grow? a 10' to 0' b 5' to 3' c 3' to 5' 23 What is the product of replication? a Single DNA strand b Two identical DNA molecules c RNA molecule 24 Which enzyme primes DNA synthesis with RNA? a Topoisomerase b Ligase c Primase 25 Which enzyme seals nicks in the backbone? a Helicase b Primase c DNA ligase 26 Which phase of the cell cycle mostly involves DNA replication? a M phase b G1 phase c S phase 27 What stabilizes the replication fork? a Histones b Single-strand binding proteins c Topoisomerase 28 Which enzyme reduces torque during unwinding? a Topoisomerase b DNA polymerase c Helicase 29 What are two strands of DNA called when they separate? a Coding strands b Complementary strands c Template strands 30 Which direction does the leading strand grow? a Away from fork b Towards the replication fork c Perpendicular to fork 31 What ensures accuracy during replication? a Ligase activity b Primer annealing c Proofreading by DNA polymerase 32 Which molecule forms between nucleotides during synthesis? a Glycosidic bond b Hydrogen bond c Phosphodiester bond 33 Which region marks where replication starts in prokaryotes? a Origin (oriC in bacteria) b Operator c Promoter 34 What is the difference between eukaryotic and prokaryotic replication origins? a Eukaryotes have multiple origins b Prokaryotes have none c Both have identical origins 35 Which molecule carries genetic code from DNA to ribosomes? a rRNA b tRNA c mRNA 36 Which base pairs with Adenine in DNA to form A-T pair? a Thymine b Cytosine c Uracil 37 Which enzyme prevents supercoiling ahead of a replication fork? a Primase b Helicase c Topoisomerase 38 What is created on the lagging strand during replication? a Okazaki fragments b Primer loops c Leading segments 39 What structures contain DNA and proteins in the nucleus? a Chromosomes b Ribosomes c Golgi bodies 40 During replication, which molecule serves as a primer? a DNA primer b RNA primer c Protein primer 41 What is the job of DNA polymerase III in bacteria? a RNA synthesis b Main DNA synthesis c Protein folding 42 Which base pairs with Guanine in DNA? a Adenine b Cytosine c Uracil 43 What is the end product of replication in bacteria? a One copy b RNA copy c Two identical circular DNA copies 44 Which term describes the expression of genes into functional products? a Transcription/translation flow b Replication only c Mutation 45 Which enzyme lays down RNA primers on the lagging strand? a DNA polymerase b Primase c Ligase 46 Which kind of bond links nucleotides in a DNA strand? a Phosphodiester bond b Peptide bond c Glycosidic bond 47 Which component stabilizes the DNA duplex during replication? a Ionic bonds b Hydrogen bonds between bases c Covalent bonds 48 What is replication fidelity primarily due to? a Ligase activity b Primer availability c Proofreading by DNA polymerases 49 Which enzyme lays down the initial RNA primer on the leading strand? a Topoisomerase b DNA polymerase c Primase

DNA Structure & Replication Quiz

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DNA Structure & Replication QuizVersion en ligne

par Naomi Morales

What macromolecule carries genetic information in cells?

Which base pairs with Adenine in DNA?

Which base pairs with Cytosine in DNA?

What is the sugar backbone of DNA called?

What holds the genetic code in units?

Which structure carries genetic information in the cell?

What initiates DNA replication at specific sites called?

Which enzyme unwinds the DNA double helix?

Which enzyme adds RNA primers during replication?

What enzyme synthesizes new DNA strands?

In DNA, which strand runs 5' to 3' direction?

Which fragments are synthesized on the lagging strand?

What joins Okazaki fragments?

What is the shape of a DNA molecule?

Which base pairs with Adenine in RNA (instead of Thymine)?

Which bond holds base pairs together?

What is the term for the complete set of an organism's genetic material?

Which process copies DNA before cell division?

Which enzyme relieves supercoiling during replication?

Which strand is synthesized discontinuously?

Which enzyme removes RNA primers in DNA replication?

What direction do DNA strands grow?

What is the product of replication?

Which enzyme primes DNA synthesis with RNA?

Which enzyme seals nicks in the backbone?

Which phase of the cell cycle mostly involves DNA replication?

What stabilizes the replication fork?

Which enzyme reduces torque during unwinding?

What are two strands of DNA called when they separate?

Which direction does the leading strand grow?

What ensures accuracy during replication?

Which molecule forms between nucleotides during synthesis?

Which region marks where replication starts in prokaryotes?

What is the difference between eukaryotic and prokaryotic replication origins?

Which molecule carries genetic code from DNA to ribosomes?

Which base pairs with Adenine in DNA to form A-T pair?

Which enzyme prevents supercoiling ahead of a replication fork?

What is created on the lagging strand during replication?

What structures contain DNA and proteins in the nucleus?

During replication, which molecule serves as a primer?

What is the job of DNA polymerase III in bacteria?

Which base pairs with Guanine in DNA?

What is the end product of replication in bacteria?

Which term describes the expression of genes into functional products?

Which enzyme lays down RNA primers on the lagging strand?

Which kind of bond links nucleotides in a DNA strand?

Which component stabilizes the DNA duplex during replication?

What is replication fidelity primarily due to?

Which enzyme lays down the initial RNA primer on the leading strand?