Review of MOCT Questions

1. A scientist performs a series of experiments to confirm an idea regarding cellular metabolism. The results of the experiment support the scientist’s initial idea, and after conferring with colleagues, the scientist discovers that evidence from many experiments has supported the same idea. This idea could now be considered a(n) ___. a. theory b. hypothesis c. observation d. control

2. 5.4 km = ___________ cm a. 540 b. 5400 c. 54,000 d. 540,000

3.What topic falls under the study of biology? a. The chemicals in fuel b. The makeup of the atmosphere c. Rocks found in a riverbed d. The digestive system of an earthworm

4. Which of the following is an observation? a. You record the air temperature every day for a week b. You propose that a cold front is approaching c. You hypothesize that the temperature will increase tomorrow d. You conclude that the season is changing

5. A controlled experiment allows the scientist to isolate and test a. A conclusion b. A mass of information c. Several variables d. A single variable

6. An organism’s niche is a. The way the organism uses the range of physical & biological conditions in which it lives b. All the physical & biological factors in the organism’s environment c. The range of temperatures that the organism needs to survive d. A full description of the place an organism lives

7. The total amount of living tissue within a given trophic level is called the a. Organism mass b. Trophic mass c. Energy mass d. Biomass

8. The series of predictable changes that occurs in a community over time is called a. Population growth b. Ecological succession c. Climax community d. Climate change

9. Only 10% of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is a. Used in reproduction b. Stored as body tissue c. Stored as fat d. Eliminated as heat

10. The simplest grouping of more than one kind of organism in the biosphere is a. A population b. A community c. An ecosystem d. A species

11. In a logistic growth curve, exponential growth is the phase in which the population a. Reaches carrying capacity b. Grows quickly and few animals are dying c. Growth begins to slow down d. Growth stops

12. Which is an abiotic factor that might affect the life of a water-dwelling organism? a. Algae growing on surface of water b. Bacterial population in water c. Predator population d. Speed of water current

13. One of the greatest threats today to biological diversity is a. Old-growth forests b. Ozone depletion c. Habitat destruction d. Monoculture

14. Which is NOT a pathway by which plants obtain atmospheric nitrogen? a. Chemical fertilizers b. Lightning c. Photosynthesis d. Symbiotic bacteria

15. Isotopes are atoms of the same element with the same number of protons and a. A different number of electrons b. A different number of molecules c. A different number of neutrons d. The same number of neutrons

16. When salt is dissolved in water, water is the a. Reactant b. Solution c. Solute d. Solvent

17. A monosaccharide is a a. Carbohydrate b. Lipid c. Nucleic acid d. Protein

18. Amino acids are the building blocks of which macromolecule? a. Carbohydrate b. DNA c. Lipid d. Protein

19. Photosynthesis uses sunlight to convert water and carbon dioxide into a. Oxygen b. High energy sugars c. ATP and oxygen d. Oxygen and high-energy sugars

20. The process by which a cell divides into two daughter cells is called a. Cell division b. Metaphase c. Interphase d. Mitosis

21. Algal cells are placed in an isotonic solution 21. Algal cells are placed in an isotonic solution. Additional amounts of solutes are slowly added to the solution. What happens to the cells? a. They will begin to swell b. They will burst c. They will stay the same d. They will shrink

22. Which of the following is released during cellular respiration? a. Oxygen b. Air c. Energy d. Lactic Acid