Passage: The Discovery and Structure of DNA

Who first identified DNA and what did he originally call it?

• Friedrich Miescher, 'nuclein'

• James Watson, 'nucleic acid'

• Phoebus Levene, 'polynucleotide'

• Erwin Chargaff, 'nucleotide'

What did Phoebus Levene contribute to the understanding of DNA?

• He discovered the double-helix structure.

• He identified the order of the three major components of a nucleotide.

• He formulated Chargaff's rule.

• He discovered DNA replication.

According to Chargaff's rule, which nucleotide pairs with adenine (A)?

• Thymine (T)

• Guanine (G)

• Cytosine (C)

• Uracil (U)

What is the primary location of DNA in a human cell?

• Nucleus

• Mitochondria

• Cytoplasm

• Ribosome

What is the structure of DNA often compared to?

• A ladder

• A spiral staircase

• A twisted rope

• A double chain

Match each base with its correct partner according to the base pair rule.

Groups:

(a) Adenine (A)

,

(b) Guanine (G)

,

(c) Thymine (T)

,

(d) Cytosine

• Thymine (T)

• Cytosine (C)

• Adenine (A)

• Guanine (G)

Identify the dexoyribose sugar in this nucleotide.

DNA is the __________ material inside the cell. (10 letters)

Where is the genetic information in DNA actually stored?

• Inside the sugar group.

• Inside the phosphate group.

• The sequence of DNA bases.

What is the purpose of DNA?