ATI TEAS 7
ATI TEAS 7 Version 1 Science Questions
Extract:
Question 1 of 5
Which of the following organic molecules contains both an amine and a carboxyl group?
Correct Answer: D
Rationale: Proteins are composed of amino acids, which contain both an amine (NH2) and a carboxyl (COOH) functional group. The amine group is found at one end of the amino acid molecule, while the carboxyl group is located at the other end. When amino acids join together through peptide bonds, the amine of one amino acid reacts with the carboxyl group of another, forming a protein chain. Therefore, the correct answer is proteins.
Extract:
Question 2 of 5
Lithium has an atomic number of 3 and a mass number of 7. What is the number of protons in a lithium atom?
Correct Answer: D
Rationale: The number of protons in an atom is equal to its atomic number. In this case, lithium has an atomic number of 3, so it contains 3 protons. The mass number (7) includes both protons and neutrons, with the difference between the mass number and atomic number representing the number of neutrons. Therefore, the correct answer is 3 protons in a lithium atom.
Question 3 of 5
What is the primary outcome of using a catalyst in a chemical reaction?
Correct Answer: C
Rationale: The primary outcome of using a catalyst in a chemical reaction is to accelerate the reaction and complete it in a shorter timeframe. A catalyst functions by lowering the activation energy required for the reaction to occur, thereby speeding up the process without altering the amount of heat energy released, the yield of the product, or the nature of the final product. This acceleration makes the reaction more efficient by facilitating the conversion of reactants to products in a more rapid manner.
Question 4 of 5
Which of the following macromolecules forms the cytoskeleton of a cell?
Correct Answer: A
Rationale: The correct answer is Proteins (Choice A). The cytoskeleton of a cell is primarily composed of proteins. Proteins such as actin, tubulin, and intermediate filaments form the structural framework of the cytoskeleton, providing support, shape, and aiding in cellular movement. Carbohydrates, nucleic acids, and lipids do not constitute the cytoskeleton; instead, they serve various functions within the cell. Therefore, understanding the composition of the cytoskeleton is crucial for comprehending cellular structure and function.
Question 5 of 5
Which of the following substances is excreted by the sweat glands in response to the breakdown of proteins and the formation of ammonia?
Correct Answer: C
Rationale: The correct answer is Urea. Sweat glands excrete urea in response to the breakdown of proteins and the formation of ammonia. Urea is a waste product formed in the liver by the breakdown of amino acids. It is then excreted by the kidneys in urine and by sweat glands through perspiration. Urea plays a vital role in the excretory process by helping eliminate nitrogenous wastes from the body and maintaining proper physiological balance.