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PSB practice test- science

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PSB practice test- science what is the name for any substance that stimulates the production for antibodies? a. collagen b. hemoglobin c. lymph d. antigen - ✔✔d. antigen which of the following correctly lists the cellular hierarchy from the simplest to the most complex structure? - ✔✔cell, tissue, organ, organ system, organism if a cell is placed in a hypertonic solution what will happen to tell cell? - ✔✔it will shrink which group of major parts and organs make up the immune system? - ✔✔lymphatic system, spleen, tonsils, thymus, and bone marrow the rate of a chemical reaction depends all on the following except: a. temperature b. surface area c. presence of catalysts d. amount of mass lost - ✔✔d. amount of mass lost What is the law: For a given mass and constant temperature, an inverse relationship exists between the volume and pressure of a gas. a. Ideal gas law b. Boyle's law c. Charle's law d. Stefan-Boltzmann law - ✔✔b. Boyle's law Which of the following statements correctly compares prokaryotic and eukaryotic cells? a. prokaryotic cells have a true nucleus, eukaryotic cells do not. b. both have a membrane c. Prokaryotic cells do not contain membrane-bound organelles, eukaryotic cells do d. prokaryotic cells are more complex than eukaryotic cells - ✔✔c. Prokaryotic cells do not contain membrane-bound organelles, eukaryotic cells do What is role of ribosomes? a. make proteins b. waste removal c. transport d. storage - ✔✔a. make proteins If an organism is Aa,Bb which of the following combinations in the gametes is impossible? a. AB b. aa c. aB d. Ab - ✔✔b. aa What is the oxidation number of hydrogen in CaH2? a. +1 b. -1 c. 0 d. +2 - ✔✔b. -1 Which hormone stimulates milk production in the breasts during lactation? a. norepinephrine b. antidiuretic hormone c. prolactin d. oxytocin - ✔✔c. prolactin What is the typical result of mitosis in humans? a. two diploid cells b. two haploid cells c. four diploid cells d. four haploid cells - ✔✔a. two diploid cells Which of the following does not exist as a diatomic molecule? a. boron b. fluorine c. oxygen d. nitrogen - ✔✔a. boron Which of the following structures has the lowest blood pressure? a. arteries b. arteriole c. venule d. vein - ✔✔d. vein How does water affect the temperature of a living thing? a. Water increases temperature b. Water keeps temperature stable c. Water decreases temperature d. Water does not affect temperature - ✔✔b. water keeps temperature stable What is another name for aqueous HI? - ✔✔hydriodic acid Which of the four heart chambers is most muscular? - ✔✔left ventricle which of the following in not a product of the krebs cycle? a. carbon dioxide b. oxygen c. ATP d. energy carriers - ✔✔b. oxygen what is the name for the reactant that is entirely consumed by the reaction? - ✔✔limiting reactant which part of the brain interprets sensory information? - ✔✔cerebrum what kind of bond connects sugars and phosphates in DNA? - ✔✔covalent

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