UCHSK, Year 10, Genetics

DNA is:

• An organ

• A cell

• A molecule

• A nucleus

DNA is stored in the nucleus of a plant or animal cell.

• True

• False

DNA provides instructions for how amino acids join together to form:

• Atoms

• Molecules

• Proteins

• Cells

The double helix structure of DNA is most similar to:

• A staircase

• A twisted ladder

• A corkscrew

• A spider web

What is a base pair?

• The two twisted chains that form the backbone of the DNA molecule

• A double helix

• Two joined bases of the same type, e.g. A–A

• Two joined bases of specific types, either A–T or G–C

Adenine (A) pairs with:

• Adenine (A)

• Cytosine (C)

• Guanine (G)

• Thymine (T)

Cytosine (C) pairs with:

• Adenine (A)

• Cytosine (C)

• Guanine (G)

• Thymine (T)

Which of these are possible base pairs?

• A-T, G-C

• A-G, T-G

• A-T, G-T

• A-G, T-C

If 30% of the bases in a particular DNA molecule are guanine (G), what percentage of the bases would be thymine (T)?

• 30%

• 60%

• 70%

• 20%

A gene is:

• A DNA molecule

• The entire collection of genetic information in a given species

• A section of DNA that provides instructions for building a specific protein