IB Biology A1.2 Nucleic Acids SL

What carries the genetic code in all living organisms?

• Ribosomes

• Deoxyribonucleic acid (DNA)

• Proteins

• Lipids

What type of genetic material do certain viruses, such as SARS-CoV-2, contain?

• DNA

• RNA

• Proteins

• Lipids

What do viruses depend on for replication and survival?

• Their own cellular machinery

• Other living cells

• Inorganic materials

• Sunlight

Which diseases are caused by viruses containing RNA?

• Diabetes and hypertension

• COVID-19 and Ebola

• Tuberculosis and malaria

• Alzheimer's and Parkinson's

How are covalent bonds shown in a nucleotide diagram?

• With dashed lines

• With solid lines

• With dotted lines

• With wavy lines

Which part of the nucleotide is bonded to the C1 atom?

• Phosphate

• Nitrogenous base

• Pentose sugar

• Amino acid

What type of bond links the phosphate group of one nucleotide to the pentose sugar of the next one?

• Ionic bond

• Hydrogen bond

• Covalent bond

• Metallic bond

What is the base linked to in the sugar-phosphate backbone?

• The phosphate group

• The pentose sugar

• The ribose sugar

• The hydrogen bond

If a DNA molecule has 20% adenine, what percentage of thymine will it have?

• 20%

• 30%

• 40%

• 50%

Which base pairs with adenine in RNA?

• Thymine

• Cytosine

• Guanine

• Uracil