- Study guides, Class notes & Summaries

Why does DNA copy itself before replication takes place? correct answers So that each new cell has the full amount of DNA What method is used to replicate DNA? correct answers Semi-conservative replication What is semi-conservative replication? correct answers When half of the strands in each new DNA molecule are from the original DNA molecule Describe the process of semi-conservative replication correct answers 1)The enzyme DNA helicase breaks the hydrogen bonds between the bases of th...

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2 pages

Written in 2024/2025

Grade A+

ProPerfomer

DNA Replication correct answers the process of making identical copies of DNA before cell division Helicase correct answers An enzyme that unwinds the double helix of DNA and separates the DNA strands in preparation for DNA replication. DNA Polymerase correct answers Enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule RNA Primer correct answers Sequence of RNA nucleotides bound to a region of single-stranded DNA to initiate DNA replication. ...

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2 pages

Written in 2024/2025

Grade A+

ProPerfomer

What is happening to the DNA molecule in the figure? (Explain the first step in DNA replication) The two strands of the double helix separate, or "unzip", allowing two replication forks to form. (Helicase) 2. What happens to the DNA molecule during the second Primase adds primer (set step of DNA replication? 3. What happens during the third step of DNA replica- tion? of RNA nucleotides), indi- cating where DNA repli- c

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4 pages

Written in 2025/2026

Grade A+

learndirect

DNA replication steps 2. semiconserva- tive replication 3. conservative replication 4. dispersive repli- cation 5. origin of replica- tion 1) Helicase- unwinds the parental double helix 2) DNA topoisomerase - upstream of helices alleviating torsional strain 3) Single-strand binding proteins (SSBP) stabilize unwound DNA, aided by DNA gyrase (topoisomerase). 4) Primase synthesizes a short RNA primer for DNA polymerase to bind to in the 5' to 3' direction to start replication o...

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13 pages

Written in 2025/2026

Grade A+

learndirect

DNA Replication Exam- 2025 2026[Complete Exam prep Questions with verified Answers] 100%Correct Answers

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32 pages

Written in 2025/2026

Grade A+

lewizranking

Semiconservative Replication - ANSWER -DNA replication process where each new strand is part old DNA and part new DNA. Complementary base pairing - ANSWER -The base pairing rule that says A bonds with T and C bonds with G

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1 pages

Written in 2025/2026

Grade A+

MERCYTRISHIA

DNA replication - -process by which DNA molecule splits and then duplicates itself, each old half of the DNA molecule codes for a new half, it forms two identical copies The DNA replication after its start will it occur only on one place? - -No, it occurs at hundreds of sites along the length of each DNA molecule Does DNA replication go in both directions? - - Yes it does, (a bit complicated though) 2 basic parts of DNA Replication are...? - -1. Opening the D

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6 pages

Written in 2025/2026

Grade A+

MERCYTRISHIA

AQA A-level Biology - Topic 1B - DNA replication || 100% VERIFIED QUESTIONS & ANSWERS!! Biology DNA Replication || QUESTIONS WITH COMPLETE SOLUTIONS!! Grade 12 Biology - 5.2 DNA Replication || 100% VERIFIED!! Section 10-3 Review: DNA REPLICATION || QUESTIONS & ANSWERS RATED 100% CORRECT!!

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12 items

ProPerfomer

Why are the strands of a DNA molecule said to be complementary? correct answers Each strand can be used to make the other strand What is the first step in eukaryotic DNA replication? correct answers The strands of thee double helix separate, or unzip If the base sequence on a separated DNA strand is CGTAGG, what will the base sequence on its complementary strand be? correct answers GCATCC What enzyme joins individual nucleotides to produce the new strand of DNA? correct answers DNA poly...

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1 pages

Written in 2024/2025

Grade A+

ProPerfomer

Okazaki fragments are ____. correct answers The discontinuous segments of the lagging strand Complementary base pairing enables ____. correct answers Directed replication of a double helix Short RNA molecules required to initiate DNA synthesis are produced by the enzyme ____. correct answers Primase Which enzyme extends the replication forks outward, increasing the size of the replication bubble when DNA synthesis reaches each fork? correct answers Helicase During semiconservative DN...

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2 pages

Written in 2024/2025

Grade A+

ProPerfomer

Replication fork correct answers Y-shaped region that results when two parental strands separate Helicase correct answers Enzyme that separates the strands of DNA during replication Semi-conservative replication correct answers In each new DNA double helix, one strand is from the original molecule, and one strand is new Before replication can take place, correct answers The two strands of DNA must separate Replication of the two DNA strands takes place correct answers In two differen...

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1 pages

Written in 2024/2025

Grade A+

ProPerfomer

DNA Replication correct answers The process of producing two identical DNA molecules from an original, parent DNA. Semi-Conservative Replication correct answers The mechanism of DNA replication in which each newly synthesized DNA molecule is composed of one strand from the original DNA molecule and one new strand. Origin of Replication correct answers The DNA sequence where replication begins. Helicase correct answers A group of enzymes that aid in the unwinding of DNA. DNA Polymeras...

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1 pages

Written in 2024/2025

Grade A+

ProPerfomer

What is the structure of DNA? correct answers Double Helix What is the building block of DNA? correct answers Nucleotides What is the compliment nitrogenous base to adenine? correct answers Uracil & Thymine When in the cell cycle does DNA Replication occur? correct answers Synthesis phase in Interphase How many replication forks are in the replication bubble? correct answers 2 What is responsible for adding support or stabilizing the newly opened DNA? correct answers Single strand...

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3 pages

Written in 2024/2025

Grade A+

ProPerfomer

DNA Replication correct answers the process of making identical copies of DNA before cell division Replication Origin correct answers Specific sequence of DNA where DNA synthesis begins. Semiconservative replication correct answers Each half of an original DNA molecule serves as a templete for a new strand, and the two new DNA molecules each have one old and one new strand. helicase correct answers An enzyme that unwinds the double helix of DNA and separates the DNA strands in preparati...

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3 pages

Written in 2024/2025

Grade A+

ProPerfomer

Cell Cycle correct answers The series of events that take place in a cell leading to duplication of its DNA -Interphase -Mitotic correct answers 2 main stages of Cell Cycle: Interphase correct answers The stage where cell grows, accumulating nutrients needed for mitosis, and undergoes DNA replication preparing it for cell division Mitotic correct answers The replicated chromosomes and cytoplasm separate into two new daughter cells Mitosis and Cytokinesis correct answers This means ...

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3 pages

Written in 2024/2025

Grade A+

ProPerfomer

dna polymerase reads The DNA template strand from the __ end of the DNA molecule to the __ end. correct answers 3' to 5' The newly created daughter strand is formed in the __ to __ Direction (opposite direction of template strand) correct answers 5' to 3' the ______ strand of DNA is continuous correct answers leading the _____ strand of DNA is discontinuous and formed using okazaky fragments correct answers lagging what is a replication fork correct answers The origin whe...

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3 pages

Written in 2024/2025

Grade A+

ProPerfomer

In the cell cycle, when does DNA replication occur? correct answers During S of interphase semi-conservative replication correct answers in each new DNA double helix, one strand is from the original molecule, and one strand is new centromere correct answers duplicated DNA molecules remain attached at the ..... sister chromatids correct answers after synthesis is complete, duplicated molecules are referred to as..... One Chromosome correct answers In eukaryotes, each DNA molecule corr...

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2 pages

Written in 2024/2025

Grade A+

ProPerfomer

Why does DNA need to replicate before cells divide? correct answers DNA replicates before a cell divides to give a complete set of genetic instructions to each daughter cell. Deoxyribose correct answers (6) a sugar derived from ribose by replacing a hydroxyl group with hydrogen. Nitrogenous base correct answers (6) An organic molecule that has a nitrogen atom, along with chemical properties of a base. The function of this base is to bond nucleic acids together. Hydrogen bond correct ans...

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2 pages

Written in 2024/2025

Grade A+

ProPerfomer

DNA replication - ANSWERSThe copying of a double stranded helix to form two identical helicies. When does DNA replication occur? - ANSWERSInterphase Why does DNA replicate? - ANSWERSso a cell can divide Where does DNA replication occur? - ANSWERSnucleus Enzymes involved in DNA replication - ANSWERSDNA helicase and DNA polymerase DNA helicase - ANSWERSUnzips the double helix by disrupting the hydrogen bonds between the anti-parallel strands. DNA polymerase - ANSWERSCreates compl...

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2 pages

Written in 2024/2025

Grade A+

Bestgrades2

DNA Replication - ANSWER the process of making identical copies of DNA before cell division Replication Origin - ANSWER Specific sequence of DNA where DNA synthesis begins. Semiconservative replication - ANSWER Each half of an original DNA molecule serves as a templete for a new strand, and the two new DNA molecules each have one old and one new strand. DNA helicase - ANSWER An enzyme that unwinds the double helix of DNA and separates the DNA strands in preparation for DNA replication. ...

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2 pages

Written in 2023/2024

Grade A+

shantelleG