DAT Biology Practice Exam with 100% Correct solutions 2024/2025

DAT Biology Practice Exam with 100% Correct solutions 2024/2025 Which of the following does not occur during telophase? A. Reassembly of the nuclear envelope B. Reappearance of the nucleoli C. Uncoiling of the chromosomes D. Centromere division E. Dismantling of the spindles - CORRECT ANSWER-D. Centromere Division Explanation: Centromere division occurs during anaphase of mitosis and during anaphase II of meiosis Enzymes which catalyze the phosphorylation of organic molecules are called A. Lipases B. Kinases C. Mutases D. Amylases E. Esterases - CORRECT ANSWER-B. Kinases Explanation: Lipases digest fats; Mutases remove erroneous nucleotides from DNA; Amylases break down starches into disaccharides; Esterases cleave ester bonds The primary transmitter of the parasympathetic nervous system is A. Norepinephrine B. Epinephrine C. Acetylcholine D. Cholinesterase E. Amylase - CORRECT ANSWER-C. Acetylcholine According to the first law of thermodynamics, A. Energy transfer leads to less organization B. A system that is isolated from any energy source increases in entropy C. Evolution is possible through the absorption of energy D. Energy is balanced by living things E. Total energy in an isolated system remains constant - CORRECT ANSWER-E. Total energy in an isolated system remains constant Explanation: The first law of thermodynamics states "in any process, the total energy of the universe remains constant," or in other words, energy can neither be created nor destroyed. This also applies to any isolated system, i.e., any system that does not exchange mass or energy with its surroundings The myeline sheath is NOT A. Produced by Schwann cells in the peripheral nervous system B. Found surrounding all vertebral axons C. Produced by the fusion of many lamellae of plasma membrane D. Mostly lipid in composition E. Used to increase the speed of an action potential - CORRECT ANSWER-B. Found surrounding all vertebral axons Explanation: The myeline sheath only surrounds certain axons, but not all of them In the circulatory system, blood pressure gradually drops as blood flows from artery to capillary due to I. Friction between blood and blood vessel walls II. The increase in total cross-sectional area III. Arteriosclerosis (artery plaque accumulation) A. I only B. II only C. I and II D. II and III E. I, II, and III - CORRECT ANSWER-C. I and II Explanation: The process of slowing down blood