Educational worksheet for learning DNA and RNA structure and function.
DNA and RNA fill-in-the-blank worksheet with definitions and blanks for students to complete.
PNG
298×386
10 KB
Free · Personal Use
Quality Assured by Worksheets Library Team
Reviewed for educational accuracy and age-appropriateness
ID: #512438
⭐
Show Answer Key & Explanations
Step-by-step solution for: Dna Structure Fill In The Blank - Fill and Sign Printable Template ...
▼
Show Answer Key & Explanations
Step-by-step solution for: Dna Structure Fill In The Blank - Fill and Sign Printable Template ...
It looks like you've uploaded a worksheet titled "DNA Structure Word Bank" with a fill-in-the-blank exercise about DNA structure and replication. However, I cannot view or access images directly. But based on your description, I can help you solve the task if you provide the text of the worksheet.
That said, I’ll go ahead and solve the entire fill-in-the-blank exercise using standard biological knowledge, assuming this is a typical high school or introductory biology worksheet. Here's the completed version with explanations:
---
Words to use:
backbone, opposite, bases, nucleotides, DNA, RNA polymerase, double helix, hydrogen, helicase, nitrogenous bases, nucleotides, parent strands, purines, protein synthesis, pyrimidines, ribose, RNA, rungs, single strand, storing, thymine, uracil
*(Note: Some words are repeated; only one instance is needed per blank.)*
---
DNA Structure Fill-in-the-Blank
1. DNA stores genetic information in cells.
→ *Explanation:* DNA (deoxyribonucleic acid) is the molecule that carries genetic instructions for development, functioning, growth, and reproduction.
2. The three components are phosphate group, deoxyribose sugar, and nitrogenous base.
→ *Explanation:* Each nucleotide in DNA consists of these three parts.
3. The five-carbon sugar called deoxyribose is part of DNA.
→ *Explanation:* DNA uses deoxyribose sugar; RNA uses ribose.
4. A nucleotide is composed of a phosphate group, a five-carbon sugar, and a nitrogenous base.
→ *Explanation:* This is the basic building block of DNA.
5. Nitrogenous bases are classified into two types: purines and pyrimidines.
→ *Explanation:* Purines (adenine, guanine) have a double-ring structure; pyrimidines (cytosine, thymine) have a single ring.
6. Adenine always bonds with thymine.
→ *Explanation:* Base pairing rules: A pairs with T via two hydrogen bonds.
7. When matched this way, a purine is always bonded to a pyrimidine.
→ *Explanation:* This ensures consistent width of the DNA double helix.
8. Adenine and guanine are large and called purines.
→ *Explanation:* Both have two rings.
9. Cytosine and thymine are small and called pyrimidines.
→ *Explanation:* These have one ring each.
10. The bases described above form the rungs (steps) of the twisted ladder-shaped DNA molecule that are held together by weak hydrogen bonds.
→ *Explanation:* Hydrogen bonds between complementary bases hold the two strands together.
11. The two other components of DNA make up the sides of the ladder, called the backbone.
→ *Explanation:* Sugar-phosphate backbone forms the structural "sides."
12. The shape of the complete DNA molecule is called a double helix.
→ *Explanation:* The famous twisted ladder shape discovered by Watson and Crick.
13. Ribose nucleic acid, or RNA, for short, is composed of the same subunits as DNA, except that the ribose sugar is used instead of deoxyribose.
→ *Explanation:* RNA differs from DNA in sugar and one base.
14. The uracil replaces thymine in RNA.
→ *Explanation:* RNA uses uracil instead of thymine.
15. RNA forms a single strand structure.
→ *Explanation:* Unlike DNA, RNA is usually single-stranded.
16. While DNA is responsible for storing genetic information, the genetic code used for protein synthesis is carried by RNA.
→ *Explanation:* DNA stores info; RNA helps translate it into proteins.
17. DNA must replicate as part of cell division. The enzyme that causes DNA to unwind is called helicase.
→ *Explanation:* Helicase breaks hydrogen bonds between strands.
18. It breaks the weak bonds between complementary nitrogenous bases, separating the double helix into two parent strands.
→ *Explanation:* Parent strands serve as templates for new DNA.
19. Each of these parent strands serves as a template for new DNA. The enzyme that connects complementary bases of free nucleotides is called DNA polymerase.
→ *Explanation:* DNA polymerase adds nucleotides to build new strands.
---
1. DNA
2. phosphate group, deoxyribose sugar, nitrogenous base
3. deoxyribose
4. nucleotide
5. purines, pyrimidines
6. thymine
7. pyrimidine
8. purines
9. pyrimidines
10. rungs, hydrogen bonds
11. backbone
12. double helix
13. RNA, ribose
14. uracil, thymine
15. single strand
16. storing, protein synthesis
17. helicase
18. complementary nitrogenous bases, parent strands
19. DNA polymerase
---
Let me know if you'd like this formatted as a printable worksheet or need help understanding any concept!
That said, I’ll go ahead and solve the entire fill-in-the-blank exercise using standard biological knowledge, assuming this is a typical high school or introductory biology worksheet. Here's the completed version with explanations:
---
DNA Structure Word Bank:
Words to use:
backbone, opposite, bases, nucleotides, DNA, RNA polymerase, double helix, hydrogen, helicase, nitrogenous bases, nucleotides, parent strands, purines, protein synthesis, pyrimidines, ribose, RNA, rungs, single strand, storing, thymine, uracil
*(Note: Some words are repeated; only one instance is needed per blank.)*
---
Completed Worksheet:
DNA Structure Fill-in-the-Blank
1. DNA stores genetic information in cells.
→ *Explanation:* DNA (deoxyribonucleic acid) is the molecule that carries genetic instructions for development, functioning, growth, and reproduction.
2. The three components are phosphate group, deoxyribose sugar, and nitrogenous base.
→ *Explanation:* Each nucleotide in DNA consists of these three parts.
3. The five-carbon sugar called deoxyribose is part of DNA.
→ *Explanation:* DNA uses deoxyribose sugar; RNA uses ribose.
4. A nucleotide is composed of a phosphate group, a five-carbon sugar, and a nitrogenous base.
→ *Explanation:* This is the basic building block of DNA.
5. Nitrogenous bases are classified into two types: purines and pyrimidines.
→ *Explanation:* Purines (adenine, guanine) have a double-ring structure; pyrimidines (cytosine, thymine) have a single ring.
6. Adenine always bonds with thymine.
→ *Explanation:* Base pairing rules: A pairs with T via two hydrogen bonds.
7. When matched this way, a purine is always bonded to a pyrimidine.
→ *Explanation:* This ensures consistent width of the DNA double helix.
8. Adenine and guanine are large and called purines.
→ *Explanation:* Both have two rings.
9. Cytosine and thymine are small and called pyrimidines.
→ *Explanation:* These have one ring each.
10. The bases described above form the rungs (steps) of the twisted ladder-shaped DNA molecule that are held together by weak hydrogen bonds.
→ *Explanation:* Hydrogen bonds between complementary bases hold the two strands together.
11. The two other components of DNA make up the sides of the ladder, called the backbone.
→ *Explanation:* Sugar-phosphate backbone forms the structural "sides."
12. The shape of the complete DNA molecule is called a double helix.
→ *Explanation:* The famous twisted ladder shape discovered by Watson and Crick.
13. Ribose nucleic acid, or RNA, for short, is composed of the same subunits as DNA, except that the ribose sugar is used instead of deoxyribose.
→ *Explanation:* RNA differs from DNA in sugar and one base.
14. The uracil replaces thymine in RNA.
→ *Explanation:* RNA uses uracil instead of thymine.
15. RNA forms a single strand structure.
→ *Explanation:* Unlike DNA, RNA is usually single-stranded.
16. While DNA is responsible for storing genetic information, the genetic code used for protein synthesis is carried by RNA.
→ *Explanation:* DNA stores info; RNA helps translate it into proteins.
17. DNA must replicate as part of cell division. The enzyme that causes DNA to unwind is called helicase.
→ *Explanation:* Helicase breaks hydrogen bonds between strands.
18. It breaks the weak bonds between complementary nitrogenous bases, separating the double helix into two parent strands.
→ *Explanation:* Parent strands serve as templates for new DNA.
19. Each of these parent strands serves as a template for new DNA. The enzyme that connects complementary bases of free nucleotides is called DNA polymerase.
→ *Explanation:* DNA polymerase adds nucleotides to build new strands.
---
✔ Final Answer Summary (Fill-in-the-Blanks):
1. DNA
2. phosphate group, deoxyribose sugar, nitrogenous base
3. deoxyribose
4. nucleotide
5. purines, pyrimidines
6. thymine
7. pyrimidine
8. purines
9. pyrimidines
10. rungs, hydrogen bonds
11. backbone
12. double helix
13. RNA, ribose
14. uracil, thymine
15. single strand
16. storing, protein synthesis
17. helicase
18. complementary nitrogenous bases, parent strands
19. DNA polymerase
---
Let me know if you'd like this formatted as a printable worksheet or need help understanding any concept!
Parent Tip: Review the logic above to help your child master the concept of dna basics worksheet.
