DNA structure A Level

The important information-carrying molecules found in all living cells:

• ATP

• DNA

• RNA

• H₂O

The molecule which stores genetic information.

• DNA

• RNA

• ATP

• H₂O

The molecule which transfers genetic information from DNA to ribosomes.

• tRNA

• mRNA

• rRNA

• ATP

The components of a ribosome

• tRNA

• mRNA

• rRNA

• proteins

DNA and RNA are long chains of nucleotides joined by phosphodiester bonds. What are these types of molecules called?

• Polymer

• Monomer

• Peptide

• Polynucleotide

Nucleotides are formed from a sugar, nitrogen-containing organic base and a phosphate group. What type of sugar?

• triose

• tetrose

• pentose

• hexose

Why does DNA have a negative charge?

• Deoxyribose

• Phosphate group

• Adenine

• Hydrogen bonding

Which of the following bases are found in a molecule of RNA?

• Thymine

• Guanine

• Cytosine

• Uracil

What sugar is found in an RNA nucleotide?

• glucose

• fructose

• deoxyribose

• ribose

What type of reaction forms a phosphodiester bond?

• hydrolysis

• condensation

• catabolic

• exothermic