Biology Sample Examination with Answer Keys

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1st Long Examination

I. Multiple Choice. Choose the best answer. Write the letter of your choice on your answer sheet.

D 1. DNA is unique among molecules in that it can
a. form multipolymer complexc. withstand very high temperatures
b. come apart and re-formd. replicate itself
B.2. Which of the following cellular organelles breaks down complex macromolecules, such as polysaccharides and proteins?
a. Golgi complexb. lysosomec. rough ERd. mitochondrion A.3. The most abundant lipid in a cell membrane
a. phospholipidsb. steroidc. cholesterold. chitin
B. 4. When the fluid outside a cell has a greater concentration of a given molecule than the fluid inside the cell, the external fluid is
a. isotonicb. hypertonicc. hypotonicd. ultratonic
A. 5. The special structures that carry materials across the cell membrane are
a. proteinsb. fatty acidsc. phosphatesd. phospholipids D. 6. Which of the following processes makes direct use of oxygen?
a. glycolysisb. fermentationc. Krebs cycled. electron transport A. 7. Biological oxidation like digestion and glycolysis (cellular respiration) are examples of
a. catabolism or bioenergeticsc. anabolic or bioenergetics
b. biosynthesis or catabolismd. biosynthesis or anabolic D. 8.The cell membrane is selectively permeable. This means that
a. is highly folded c. allows any molecules to pass through
b. allows all materials to pass through d. allows only certain materials to pass C. 9. Which of the following is not part of facilitated diffusion?
a. Solutes are moved by a change in shape in the carrier protein.
b. The solute can be moved in either direction.
c. The process requires energy input.
d. The process is passive.
A. 10.The special structures that carry materials across the cell membrane are
a. proteins b. fatty acids c. phosphates d. phospholipids D. 11. Which of the following substances does not pass across membranes by simple diffusion?
a. oxygenb. carbon dioxide c. water d. hydrogen
A. 12. Which of the following substances does not enter cells through membrane proteins or by endocytosis?
a. oxygen b. glucose c. proteinsd. amino acids
C. 13. Which of the following methods for transporting substances across a membrane does not involve a change in shape of the transport protein? a. facilitated diffusionb. active transport c. simple diffusion d. Na-K pump A. 14. Which of the following is not a form of endocytosis?

a. monocytosis b. phagocytosisc. pinocytosis d. cell-eating D. 15. The process by which a cell secretes macromolecules by fusing a transport vesicle to the plasma membrane is called
a. pinocytosis b. endocytosisc. phagocytosis d. exocytosis B. 16. The process by which a unicellular organism, such as amoeba, engulfs a food particle by first enclosing it within a pseudopodium and then packaging it in a membrane-bound vacuole is called

a. pinocytosisb. phagocytosisc. monocytosisd. none
D. 17. An input of energy is required for which one of the following?
a. diffusion b. osmosis c. facilitated diffusiond. active transport A. 18. During the complete oxidation of 1 molecule of glucose, 36 molecules of ATP are produced.
a. trueb. falsec. maybed. I don’t know

II. Modified Multiple Choice. Write your answer on the answer sheet. Write capital
A if choice a is correct but choice b is wrong
B if choice b is correct but choice a is wrong
C if both choices are correct
D if both choices are incorrect

B. 1. a. Cholesterol is a saturated fat.
b. Lysosomes contain enzymes capable of digesting part of the cell. B. 2. a. In mitosis, the number of chromosomes sets in daughter cell will be twice the number in the parent cell.
b. Nuclear envelope is not found in a prokaryotic cell.
A. 3. a. In a eukaryotic cell, the region between the nucleus and the plasma membrane is cytoplasm.
b. Proteins that are to be...
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