IB Biology Topic 2.6 Review

What are monomers of nucleic acids?

• Nitrogenous bases

• DNA

• Nucleotides

• Nucleus

Which of the following can be present in a molecule of DNA?

• Ribose

• Phosphate

• Thymine

• Guanine

• Uracil

What type of bonds are present between complementary nitrogenous bases?

• Covalent bonds

• Ionic bonds

• Hydrogen bonds

• Peptide bonds

In complementary base pairing in DNA:

• A pairs with T, C pairs with G

• A pairs with U, C pairs with G

• A pairs with C, T pairs with G

• A pairs with G, C pairs with T

• Any base can pair with any other base

Purine bases include:

• C, T

• A, G

• C, G

• A, C

• C, T, U

What is common among purine bases

• They form complementary base pairs with each other.

• They have one carbon ring.

• They have two carbon rings

• They have no nitrogen

The structure of DNA is often described as:

• parallel

• alpha-helix

• double helix

• helicase

When adenine pairs with it's complementary base, how many hydrogen bonds are formed?

• 1

• 2

• 3

• 4

When guanine pairs with it's complementary base, how many hydrogen bonds are formed?

• 1

• 2

• 3

• 4

Outline the differences between DNA and RNA.