Question

dna: the code of life (8th grade worksheet)

1. fill in the blank

word bank: double helix, nucleus, nucleotides, separate, thymine, replication
fill in the blank with the correct word from the word bank.

1. the unique shape of the dna molecule, like a twisted ladder, is called a ________.
2. dna is found inside a part of the cell called the ________.
3. the small units that make up the dna molecule are called ________.
4. in dna, the base adenine (a) always pairs with ________.
5. during dna replication, the two strands of dna ________ from each other.
6. the process of making an exact copy of dna before a cell divides is called ________.
7. multiple choice questions

choose the one correct answer for each question.

1. what are the building blocks that link together to form dna?

a) proteins
b) nucleotides
c) sugars
d) lipids

Explanation:

1. DNA's shape is a double helix.
2. DNA is located in the nucleus.
3. Nucleotides make up DNA.
4. Adenine pairs with thymine.
5. DNA strands separate during replication.
6. Making a copy of DNA is replication.

For the multiple - choice question:

• Proteins are made from amino acids.
• Sugars are part of nucleotides but not the building blocks of DNA alone.
• Lipids are for energy storage and cell membranes.
• Nucleotides are the building blocks of DNA.

Answer:

1. double helix
2. nucleus
3. nucleotides
4. thymine
5. separate
6. replication

Multiple - choice: B. Nucleotides