ATI TEAS 7 SCIENCE PRACTICE QUESTIONS AND ANSWERS 100% CORRECT!

Define "transcription factor" - ANSWER Transcription factor is a protein that controls the rate of transcription. Which of the following is true for a sodium atom? (A) It has more neutrons than protons, (B) It has an equal number of neutrons and electrons, (C), It has a valence of 11, or (D) It has an atomic mass of 34? - ANSWER (A) It has more neutrons than protons. An atom of sodium has 12 neutrons and 11 protons. An atom of sodium has a valence of 1. Sodium has an atomic mass of 23. What is this structure and where does blood flow from it? - ANSWER The blood vessels represent the pulmonary arteries, which carry blood to the lungs where gas exchange occurs. The pulmonary veins deliver blood to the ____. - ANSWER Left ventricle The vena cava delivers blood to the ____. - ANSWER Right ventricle The carotid arteries rising from the aorta deliver blood to the ___. - ANSWER Brain 10^4 meters in kilometers is: - ANSWER 10,000 meters or 10 kilometers 10^-1 hectometers in kilometers is: - ANSWER 0.1 kilometer 10^9 micrometers in kilometers is: - ANSWER 1 kilometer 10^6 centimeters in kilometers is: - ANSWER 10 kilometers Loss of the myelin sheath surrounding neurons results in which of the following? (A) Neurons lose the ability to metabolize glucose, (B) The neurons die within a short period of time, (C) Neurons replicate more rapidly, or (D) Electrical signaling to downstream cells is disrupted. - ANSWER (D) Electrical signaling to downstream cells is disrupted. Loss of the myelin sheath results in loss of nerve insulation, leading to electrical messages to downstream cells being lost into surrounding tissue. An ionic compound is formed between a ___ and a ___. - ANSWER Metal and non-metal