Klíč odpovědi na pracovní list DNA a replikace

DNA And Replication Worksheet Answer Key – Easy Difficulty

Klíč odpovědi na pracovní list DNA a replikace

Název: ___________________________
Datum: _____________________________

**Instructions:** This worksheet will help you understand the basics of DNA and its replication process. Complete the exercises below by following the instructions carefully.

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**I. Fill in the Blanks**
Doplň věty tak, že do prázdných míst doplníš vhodná slova ze slova banka.

Banka slov:
nucleotide, double helix, bases, replication, RNA, thymine, adenine, cytosine, guanine

1. DNA se skládá ze stavebních bloků zvaných __________.
2. The structure of DNA is often described as a __________.
3. The four nitrogenous __________ found in DNA are adenine, thymine, cytosine, and guanine.
4. DNA __________ is the process by which a cell makes a copy of its DNA.
5. In DNA, adenine pairs with __________ and cytosine pairs with __________.

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**II. True or False**
Read each statement and write “True” or “False” next to each.

1. DNA is the genetic material in most organisms. __________
2. RNA and DNA have the same bases. __________
3. Thymine is found in RNA. __________
4. DNA replication occurs before a cell divides. __________
5. The process of replication results in one copy of DNA. __________

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**III. Multiple Choice**
U každé otázky zakroužkujte správnou odpověď.

1. Which of the following enzymes is responsible for unwinding the DNA double helix during replication?
a) DNA polymeráza
b) Helicase
c) Ligáza
d) Primární

2. What is the base that pairs with adenine in DNA?
a) Cytosin
b) Guanine
c) Thymine
d) uracil

3. During DNA replication, new nucleotides are added to which end of the growing strand?
a) 3′ end
b) 5′ end
c) Both ends
d) Žádná z výše uvedených možností

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**IV. Short Answer**
Odpovězte stručně na následující otázky.

1. What is the role of DNA in living organisms?

______________________________________________________________________

2. Why is the process of DNA replication important for cell division?

______________________________________________________________________

3. What are the differences between DNA and RNA?

______________________________________________________________________

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**V. Diagram Labeling**
Below is a diagram of a DNA molecule. Label the following parts on the diagram:
- Cukr
– Fosfátová skupina
– Dusíkaté báze
– Vodíkové vazby

(Diagram provided by teacher)

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**VI. Reflection**
Write a few sentences about what you learned about DNA and its replication. How does understanding DNA help in fields like medicine or genetics?

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________

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**Konec pracovního listu**

**Answer Key**

I. Vyplňte mezery
1. nucleotide
2. double helix
3. základy
4. replication
5. thymine; guanine

II. True or False
1. Pravda
2. Nepravdivé
3. Nepravdivé
4. Pravda
5. Nepravdivé

III. Multiple Choice
1. b) Helicase
2. c) Thymine
3. a) 3′ end

IV. Krátká odpověď
1. DNA carries genetic information essential for growth, development, and functioning of living organisms.
2. DNA replication ensures that each daughter cell receives an exact copy of the DNA during cell division.
3. DNA has thymine, is double-stranded, and stores genetic information; RNA has uracil, is single-stranded, and plays a role in protein synthesis.

V. Drawings will vary; students should correctly label the parts as instructed.

VI. Reflections will vary based on student responses