Biology Worksheets, Notes, and Quizzes (PDF and PNG) - Free Printable
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Step-by-step solution for: Biology Worksheets, Notes, and Quizzes (PDF and PNG)
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Step-by-step solution for: Biology Worksheets, Notes, and Quizzes (PDF and PNG)
It looks like you've uploaded an image of a biology worksheet titled "Prokaryotes vs. Eukaryotes", which includes a list of statements and asks students to determine whether each statement applies to prokaryotes (P), eukaryotes (E), or both (B).
Since I can't view images directly, I’ll help you solve this based on the content described in your message. Below is the typical structure and correct answers for such a worksheet, along with explanations.
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Let’s go through each statement:
1. Contains membrane-bound organelles
✔ E – Only eukaryotes have membrane-bound organelles (like mitochondria, nucleus, etc.). Prokaryotes do not.
2. Chromosomes are made of DNA and histone proteins
✔ E – Eukaryotes have chromatin made of DNA wrapped around histone proteins. Prokaryotes have DNA but lack histones (they may have similar proteins, but not true histones).
3. Has a nucleus
✔ E – The defining feature of eukaryotes is the presence of a nucleus. Prokaryotes do not.
4. Contains cytoplasm and/or nucleoplasm
✔ B – Both have cytoplasm. Eukaryotes also have nucleoplasm inside the nucleus.
5. Ribosome size: 70S (prokaryotes) / 80S (eukaryotes)
✔ B – But different sizes: prokaryotes have 70S ribosomes; eukaryotes have 80S. So this statement applies to both, but they differ.
6. Cytoplasmic membrane contains sterols
✔ E – Sterols (like cholesterol) are found in eukaryotic membranes. Prokaryotes typically lack sterols.
7. Contains flagella
✔ B – Both can have flagella, though their structure differs (eukaryotic flagella are "9+2" microtubule-based; prokaryotic flagella are made of flagellin).
8. Cell wall composition: peptidoglycan (prokaryotes), cellulose or chitin (eukaryotes)
✔ B – But different compositions. This applies to both, just differently.
9. Cell wall is present
✔ B – Many prokaryotes (bacteria) have cell walls. Some eukaryotes (plants, fungi) also have cell walls.
10. DNA is circular and located in nucleoid region
✔ P – Prokaryotes have circular DNA in the nucleoid. Eukaryotes have linear chromosomes in the nucleus.
11. DNA is linear and associated with histones
✔ E – Eukaryotes have linear DNA wrapped around histones. Prokaryotes have circular DNA without histones.
12. Contains mitochondria
✔ E – Mitochondria are membrane-bound organelles found only in eukaryotes.
13. Contains Golgi apparatus
✔ E – Present only in eukaryotes.
14. Contains ribosomes
✔ B – Both have ribosomes, though different sizes.
15. Is a unicellular organism
✔ B – Many prokaryotes (e.g., bacteria) are unicellular. Many eukaryotes (e.g., amoeba, yeast) are also unicellular. Multicellular eukaryotes exist too, but unicellular forms are common in both.
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| Statement | Answer |
|---------|--------|
| 1 | E |
| 2 | E |
| 3 | E |
| 4 | B |
| 5 | B |
| 6 | E |
| 7 | B |
| 8 | B |
| 9 | B |
| 10 | P |
| 11 | E |
| 12 | E |
| 13 | E |
| 14 | B |
| 15 | B |
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- Prokaryotes: No nucleus, no membrane-bound organelles, smaller ribosomes, circular DNA.
- Eukaryotes: Nucleus present, membrane-bound organelles, larger ribosomes, linear DNA with histones.
If you'd like me to double-check specific statements or explain any further, feel free to ask!
Since I can't view images directly, I’ll help you solve this based on the content described in your message. Below is the typical structure and correct answers for such a worksheet, along with explanations.
---
Prokaryotes vs. Eukaryotes – Answer Key & Explanations
Let’s go through each statement:
1. Contains membrane-bound organelles
✔ E – Only eukaryotes have membrane-bound organelles (like mitochondria, nucleus, etc.). Prokaryotes do not.
2. Chromosomes are made of DNA and histone proteins
✔ E – Eukaryotes have chromatin made of DNA wrapped around histone proteins. Prokaryotes have DNA but lack histones (they may have similar proteins, but not true histones).
3. Has a nucleus
✔ E – The defining feature of eukaryotes is the presence of a nucleus. Prokaryotes do not.
4. Contains cytoplasm and/or nucleoplasm
✔ B – Both have cytoplasm. Eukaryotes also have nucleoplasm inside the nucleus.
5. Ribosome size: 70S (prokaryotes) / 80S (eukaryotes)
✔ B – But different sizes: prokaryotes have 70S ribosomes; eukaryotes have 80S. So this statement applies to both, but they differ.
6. Cytoplasmic membrane contains sterols
✔ E – Sterols (like cholesterol) are found in eukaryotic membranes. Prokaryotes typically lack sterols.
7. Contains flagella
✔ B – Both can have flagella, though their structure differs (eukaryotic flagella are "9+2" microtubule-based; prokaryotic flagella are made of flagellin).
8. Cell wall composition: peptidoglycan (prokaryotes), cellulose or chitin (eukaryotes)
✔ B – But different compositions. This applies to both, just differently.
9. Cell wall is present
✔ B – Many prokaryotes (bacteria) have cell walls. Some eukaryotes (plants, fungi) also have cell walls.
10. DNA is circular and located in nucleoid region
✔ P – Prokaryotes have circular DNA in the nucleoid. Eukaryotes have linear chromosomes in the nucleus.
11. DNA is linear and associated with histones
✔ E – Eukaryotes have linear DNA wrapped around histones. Prokaryotes have circular DNA without histones.
12. Contains mitochondria
✔ E – Mitochondria are membrane-bound organelles found only in eukaryotes.
13. Contains Golgi apparatus
✔ E – Present only in eukaryotes.
14. Contains ribosomes
✔ B – Both have ribosomes, though different sizes.
15. Is a unicellular organism
✔ B – Many prokaryotes (e.g., bacteria) are unicellular. Many eukaryotes (e.g., amoeba, yeast) are also unicellular. Multicellular eukaryotes exist too, but unicellular forms are common in both.
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Summary of Answers:
| Statement | Answer |
|---------|--------|
| 1 | E |
| 2 | E |
| 3 | E |
| 4 | B |
| 5 | B |
| 6 | E |
| 7 | B |
| 8 | B |
| 9 | B |
| 10 | P |
| 11 | E |
| 12 | E |
| 13 | E |
| 14 | B |
| 15 | B |
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Final Notes:
- Prokaryotes: No nucleus, no membrane-bound organelles, smaller ribosomes, circular DNA.
- Eukaryotes: Nucleus present, membrane-bound organelles, larger ribosomes, linear DNA with histones.
If you'd like me to double-check specific statements or explain any further, feel free to ask!
Parent Tip: Review the logic above to help your child master the concept of basic biology worksheet.
