DNA and RNA molecular structure

DNA and RNA are both examples of which type of organic molecule?

• protein

• carbohydrate

• lipid

• nucleic acid

What is the building block of the nucleic acids DNA and RNA?

• amino acids

• monosaccharides

• fatty acids

• nucleotide

The three components of a DNA nucleotide are

• deoxyribose sugar, a phosphate group and a nitrogen base (A, T, C, or G)

• ribose sugar, a phosphate group and a nitrogen base (A, U, C or G)

• the amino acids leucine, phenylalanine and valine

• the sugars lactose, glucose and maltose

Characteristics of a DNA molecule include it being

• a double helix

• a single helix

• made of proteins

• made of fats

The three components of an RNA nucleotide are

• deoxyribose sugar, a phosphate group and a nitrogen base (A, T, C, or G)

• ribose sugar, a phosphate group and a nitrogen base (A, U, C, or G)

• the amino acids isoleucine, serine and cysteine

• the sugars fructose, galactose and glucose

A small section of DNA is called a

• protein

• gene

• amino acid

• fat

Create base pairs by matching the correct letters together.

• T

• T

• A

• A

• C

• G

• G

• C

The three types of RNA include all the following except

• tRNA

• mRNA

• xRNA

• rRNA

The "backbone" of the DNA or RNA molecule consists of

• a sugar and the phosphate group

• the nitrogen bases

• amino acids of the same size

• proteins

The "rungs" of the DNA or RNA molecule consist of

• amino acids of varying sizes

• proteins

• the nitrogen bases

• sugars