USABO OPEN EXAM PRACTICE SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
⩥ Disaccharide. Answer: A double sugar, consisting of two
monosaccharides joined by dehydration synthesis.
⩥ Monosaccharide. Answer: A single sugar molecule such as glucose or
fructose, the simplest type of sugar.
⩥ Polysaccharide. Answer: Carbohydrates that are made up of more than
two monosaccharides
⩥ Glycosidic Linkage. Answer: A covalent bond formed between two
monosaccharides by a dehydration reaction.
⩥ Starch. Answer: A storage polysaccharide in plants consisting entirely
of glucose.
⩥ Cellulose. Answer: A substance (made of sugars) that is common in
the cell walls of many organisms
, ⩥ Lipid Examples. Answer: fatty acids, fats, saturated fats, unsaturated
fats, steroids, phospholipids, cholesterol, triglycerides
⩥ Unsaturated Fat. Answer: A lipid made from fatty acids that have at
least one double bond between carbon atoms.
⩥ Saturated Fat. Answer: A lipid made from fatty acids that have no
double bonds between carbon atoms
⩥ Steroid. Answer: lipid molecule with four fused carbon rings
⩥ Phospholipid. Answer: a lipid that contains phosphorus and that is a
structural component in cell membranes
⩥ Nucleotide. Answer: monomer of nucleic acids made up of a 5-carbon
sugar, a phosphate group, and a nitrogenous base
⩥ Nucleic Acid Examples. Answer: DNA, RNA, (ATP and ADP are
modified nucleic acids)
⩥ Protein Examples. Answer: amino acids, primary, secondary, tertiary,
quaternary structures, collagen, hemoglobin, enzymes
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
⩥ Disaccharide. Answer: A double sugar, consisting of two
monosaccharides joined by dehydration synthesis.
⩥ Monosaccharide. Answer: A single sugar molecule such as glucose or
fructose, the simplest type of sugar.
⩥ Polysaccharide. Answer: Carbohydrates that are made up of more than
two monosaccharides
⩥ Glycosidic Linkage. Answer: A covalent bond formed between two
monosaccharides by a dehydration reaction.
⩥ Starch. Answer: A storage polysaccharide in plants consisting entirely
of glucose.
⩥ Cellulose. Answer: A substance (made of sugars) that is common in
the cell walls of many organisms
, ⩥ Lipid Examples. Answer: fatty acids, fats, saturated fats, unsaturated
fats, steroids, phospholipids, cholesterol, triglycerides
⩥ Unsaturated Fat. Answer: A lipid made from fatty acids that have at
least one double bond between carbon atoms.
⩥ Saturated Fat. Answer: A lipid made from fatty acids that have no
double bonds between carbon atoms
⩥ Steroid. Answer: lipid molecule with four fused carbon rings
⩥ Phospholipid. Answer: a lipid that contains phosphorus and that is a
structural component in cell membranes
⩥ Nucleotide. Answer: monomer of nucleic acids made up of a 5-carbon
sugar, a phosphate group, and a nitrogenous base
⩥ Nucleic Acid Examples. Answer: DNA, RNA, (ATP and ADP are
modified nucleic acids)
⩥ Protein Examples. Answer: amino acids, primary, secondary, tertiary,
quaternary structures, collagen, hemoglobin, enzymes
