DNA Structure and Replication

Multiple Choice

Which of the following bases are found in DNA?

• Adenine, Thymine, Guanine, Cytosine

• Adenine, Uracil, Guanine, Cytosine

• Adenine, Thymine, Guanine, Uracil

• Adenine, Thymine, Guanine, Lysine

Multiple Select

Which of the following are components of a nucleotide in DNA?

• Phosphate group

• Deoxyribose sugar

• Nitrogenous base

• Amino acid

Multiple Choice

Which pair of bases are always found in equal amounts in a DNA sample according to Chargaff's rules?

• Adenine and Thymine

• Adenine and Guanine

• Guanine and Thymine

• Cytosine and Thymine

Open Ended

Explain the significance of hydrogen bonds in the base pairing of DNA and how they contribute to the stability of the DNA double helix.

Labelling

label the following parts of the DNA Molecule.

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Hydrogen Bonds

Phosphate

nitrogen bases

Nucleotide

sugars

Multiple Choice

According to Chargaff's rules, the number of guanine nucleotides must equal the number of:

• Cytosine nucleotides

• Adenine nucleotides

• Thymine nucleotides

• Thymine plus adenine nucleotides

Multiple Choice

Which of the following base pairs occur in DNA?

• A with T, and C with G

• A with C, and G with T

• A with G, and C with T

• A with T, and C with T

Multiple Choice

Where is eukaryotic DNA located within the cell?

• In the cytoplasm

• In the mitochondria

• In the nucleus

• In the ribosome

Labelling

Label the following terms: Cell, DNA, Chromosome, Nucleus, Gene

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gene

DNA

chromosome

nucleus

cell

Multiple Select

Which of the following are components or structures involved in the packaging of DNA in eukaryotic chromosomes?

• Histones

• Nucleosomes

• Ribosomes

• Chromatin

Multiple Choice

What is the function of replication forks during DNA replication?

• They synthesize new proteins

• They are the sites where separation and replication occur

• They destroy old DNA strands

• They package DNA into chromosomes

Multiple Choice

What is the main purpose of DNA replication before a cell divides?

• To ensure each resulting cell has a complete set of DNA molecules

• To produce energy for the cell

• To create proteins for the cell

• To remove mutations from DNA

Multiple Choice

During DNA replication, which enzyme is responsible for constructing a new complementary strand?

• Helicase

• Ligase

• DNA polymerase

• Primase

Multiple Select

Which of the following statements about DNA strands are correct?

• They are antiparallel

• They have a 5' and a 3' end

• They are identical in direction

• They are held together by hydrogen bonds

Multiple Choice

order of replication

• 3, 2, 1, 4
• 2, 1, 4, 3
• 2, 3, 1, 4
• 3, 4, 1, 2

Open Ended

What is one question you still have about how DNA affects traits or genetic information?