Science Practice Test Flashcards
6 cards from real TEAS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Science Practice Test flashcards as text
Which of the following correctly traces the path of blood through the heart?
Answer: Right atrium → right ventricle → pulmonary artery → lungs → pulmonary veins → left atrium → left ventricle → aorta
Deoxygenated blood enters the right atrium, moves to the right ventricle, is pumped to the lungs via the pulmonary artery, returns oxygenated via pulmonary veins to the left atrium, then left ventricle, and out through the aorta.
A solution with a pH of 2 is how many times more acidic than a solution with a pH of 4?
Answer: 100 times
The pH scale is logarithmic. Each unit represents a tenfold difference, so a difference of 2 pH units means 10² = 100 times more acidic.
Which macromolecule serves as the primary long-term energy storage in humans?
Answer: Lipids (fats)
Lipids (triglycerides/fats) are the primary long-term energy storage molecules in the human body, providing 9 calories per gram compared to 4 for carbohydrates and proteins.
Which organ is primarily responsible for filtering blood, removing waste products, and maintaining fluid and electrolyte balance?
Answer: Kidneys
The kidneys filter approximately 180 liters of blood daily, removing waste products as urine while regulating fluid volume, electrolyte concentrations, and acid-base balance.
In genetics, if a trait is autosomal recessive, what must be true for an individual to express that trait?
Answer: They must have two copies of the recessive allele (be homozygous recessive)
Autosomal recessive traits are only expressed when an individual inherits two copies of the recessive allele (one from each parent), making them homozygous recessive.
A researcher observes that enzyme activity increases as temperature rises from 20°C to 37°C but drops sharply above 40°C. What best explains the decrease above 40°C?
Answer: The enzyme becomes denatured as heat disrupts its three-dimensional structure
Above optimal temperature, excessive heat breaks the hydrogen bonds and other weak interactions that maintain the enzyme's shape, denaturing it and destroying its catalytic ability.