You may find a question in your biology practice book to label diagram of DNA replication. And now, you need to know the answer for that for studying. If so, you are able to check the answer key for that below according to some online sources. It is important for you to note that you are only able to use the answer key below for studying, not for cheating.
Labeling DNA Replication
According to the Quizlet, here is the answer for labelling DNA replication.
- Single Stranded Binding Protein
It binds to and stabilizes single-stranded DNA until it can be used as a template.
- Helicase
It is an enzyme that unwinds the DNA double helix during DNA replication.
- Primase
It is an enzyme that creates a short RNA primer for initiation of DNA replication.
- RNA Primer
It is short segment of RNA used to initiate synthesis of a new strand of DNA during replication
The primer synthesized by primase enzyme.
- Topoisomerase
It corrects “overwinding” ahead of replication forks by breaking, swiveling, and rejoining DNA strands.
- DNA Polymerase on Leading Strand
It synthesizes new DNA only in the 5′ to 3′ direction.
- Okazaki Fragment
It is short segment of DNA synthesized discontinuously in small segments in the 3′ to 5′ direction by DNA polymerase.
- DNA Polymerase on lagging strand
It synthesizes new DNA only in the 3’ to 5’ direction.
- Ligase
It is an enzyme that connects two fragments of DNA to make a single fragment.
- Leading Strand
It is the new continuous complementary DNA strand synthesized along the template strand in the mandatory 5′ to 3′ direction.
- Lagging Strand
It is the strand in replication that is copied 3′ to 5′ as Okazaki fragments and then joined up.
Answer Key for Worksheet – Structure of DNA and Replication
If you access this link here, you will find the answer key for Worksheet – Structure of DNA and Replication as you are able to see below.
Directions: Label the diagram below with the following choices:
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Directions: Complete each sentence.
- Guanine, cytosine, thymine, and adenine are the four bases in DNA.
- In DNA, guanine always forms hydrogen bonds with cytosine.
- The process of replication produces a new copy of an organism’s genetic information, which is passed on to a new cell.
- The double coiled, “staircase” shape of DNA is called a helix.
Directions: Answer each question, you do not need complete sentences.
- What do the letters DNA stand for?
Answer: Deoxyribonucleic Acid
- Where is DNA found?
Answer: For eukaryotes, DNA is found in the nucleus. For prokaryotes, DNA is found in the cytoplasm.
- What is the first step in the process of DNA replication?
Answer: Helicase comes in and unzips the helix by breaking hydrogen bonds.
- Which enzyme is responsible for “unzipping” the DNA double helix?
Answer: Helicase
- Which enzyme is responsible for bonding the nucleotides in a new DNA molecule?
Answer: Polymerase
- If the sentence of one single strand of DNA is C-A-A-G-T-A-G-G-C-T, what is the sequence of the complimentary strand?
Answer: G-T-T-C-A-T-C-C-G-A
- Describe the origin of each strand of the new double helices created after DNA replication.
Answer: One of the strands comes from the original strand.
The second strand is created utilizing free floating nucleotides in the cell.
- Why is DNA replication important to the growth and development of a multi-cellular organism?
Answer: when creating new cells, each cell needs DNA. DNA are the instructions for the cell – without DNA the cell would not function.
- Place the following terms in the correct order from smallest to largest: Nucleus, DNA double helix, chromosome
Answer: DNA double helix, Chromosome, Nucleus
- List the 3 basic steps of DNA replication:
Answer:
A. Helicase opens up the helix.
B. Polymerase adds complimentary bases to the original strand.
C. Polymerase proofreads the strand.
21. The model of DNA below is ready to be copied. Compared to the original double helix, evaluate the copies made during three attempts of DNA replication. List any errors with the replication if they occurred.
Original
| A | T |
| T | A |
| C | G |
| C | G |
| G | C |
| T | A |
| G | C |
Answer:
Replication #1
| A | T |
| T | A |
| C | G |
| C | G |
| G | C |
| T | A |
| G | C |
And
| A | T |
| T | A |
| C | G |
| A | G |
| G | C |
| T | A |
| G | C |
List problems if any: see highlighted
Replication #2
| A | T |
| T | A |
| C | G |
| C | G |
| G | C |
| T | A |
| G | C |
And
| A | T |
| T | A |
| C | G |
| C | G |
| G | C |
| T | A |
| G | C |
List problems if any: None
- Complete the diagram on the left. Then circle the areas in the diagram on the right that show a genetic mutation.
DNA Correctly Copied
| A | T |
| G | C |
| C | G |
| T | A |
| A | T |
| T | A |
| A | T |
| A | T |
| G | C |
| C | G |
| T | A |
| A | T |
| T | A |
| A | T |
| A | T |
| G | C |
| C | G |
| T | A |
| A | T |
| T | A |
| A | T |
DNA Incorrectly Copied
| A | T |
| G | C |
| C | G |
| T | A |
| A | T |
| T | A |
| A | T |
| A | T |
| G | C |
| C | G |
| T | A |
| A | T |
| T | G |
| A | T |
| G | T |
| G | C |
| C | G |
| T | A |
| A | T |
| C | A |
| A | T |
- Explain how the mutations might have been caused in the diagram above.
Answer: Many things may have caused the mutations above. DNA Polymerase may have missed this in its proofreading phase. Also, it could have changed after it was correctly pair due to environmental conditions.
That’s all the information that I can give to you about labelling diagram of DNA replication. Hopefully, the explanation that is given above can help you. However, it is important for you to note that you are only able to use this for studying and you have to make sure that you do not use it for cheating.
