MDCAT Preparation MCQs
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in MDCAT
Answer: Temperature is a non-living (abiotic) component of an ecosystem.
Answer: Fungi are heterotrophic organisms that absorb nutrients, including mushrooms, yeasts, and molds.
Answer: Human blood pH is tightly regulated between 7.35 and 7.45 by buffer systems.
Answer: Glycolysis takes place in the cytoplasm, breaking glucose into two molecules of pyruvate.
Answer: Mushrooms are fungi that break down dead organic matter, recycling nutrients back into the ecosystem.
Answer: CO2 traps heat in the atmosphere, preventing infrared radiation from escaping to space.
Answer: ATP (Adenosine triphosphate) is the primary energy currency of the cell.
Answer: Fructose is a monosaccharide, a simple sugar that cannot be hydrolyzed further.
Answer: Energy pyramids show the decrease in available energy at each trophic level.
Answer: Enzymes are substrate-specific due to the complementary shape of their active site.
Answer: Natural disasters affect populations regardless of their density.
Answer: Enzymes are proteins that speed up biochemical reactions without being consumed.
Answer: Peptide bonds form between the amino group of one amino acid and the carboxyl group of another.
Answer: Tropical rainforests have the highest species diversity due to warm temperatures and abundant rainfall.
Answer: Lipids are hydrophobic molecules that are insoluble in water but soluble in organic solvents.
Answer: Biological organization progresses from cells to tissues to organs to organ systems.
Answer: Primary consumers (herbivores) feed directly on producers (plants).
Answer: Competitive inhibitors compete with the substrate for binding at the enzyme\'s active site.
Answer: Biodiversity is the variety of all living organisms including species, genetic, and ecosystem diversity.
Answer: Fossils are preserved remains or traces of organisms from past geological ages.