Posted: February 22nd, 2017

Which of the following molecules contains the fewest covalent bonds? A. Water molecule (Hp) B. Ammonia molecule (NH3) C. Methane molecule (CH4) D. Chlorine molecule (CI2)

APAtutuor 1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules

2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis

3. Lithium has an atomic number of 3 and a mass number of 7. Which of the following is the number of protons in a lithium atom? A.3 B. 4 C. 7 D. 12

4. Which of the following molecules contains the fewest covalent bonds? A. Water molecule (Hp) B. Ammonia molecule (NH3) C. Methane molecule (CH4) D. Chlorine molecule (CI2)

5. When salt (NaCI) is added to water, it disassociates into Na• and Cl-ions. Which of the following types of chemical bond is present in a salt molecule? A. Covalent bond B. Ionic bond C. Hydrogen bond D. Disulfide bond

6. An example of active immunity is the transfer of A. antibodies through the placenta. B. immunoglobulins through breastfeeding. C. antigens through vaccination. D. immune cells through a blood transfusion. 7. Which of the following classes of biological molecules include enzymes? A. Carbohydrates B. Lipids C. Proteins D. Vitamins

8. Which of the following parts of the circulatory system carries oxygenated blood? A. An artery moving blood from the heart to the lungs B. A vein moving blood to the heart from the body C. An artery moving blood from the heart to a muscle cell D. A venule moving blood to the heart from the liver

9. Which of the following genetic terms describes an observable trait of an individual? A. Heterozygous B. Genotype C. Phenotype D. Homozygous

10. Mutations during which of the following processes in animals will affect offspring of succeeding generations? A. Meiosis B. Mitosis C. Translation D. Transcription

11. Which of the following will happen if mRNA fails to be translated? A. The cell’s nucleus will produce more chromatin. B. Ribosomes will not be able to create protein. C. Mitochondria will release ATP. D. The cell will produce more mRNA